{"id":103216,"date":"2024-03-14T21:16:43","date_gmt":"2024-03-15T04:16:43","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=103216"},"modified":"2024-10-24T11:41:35","modified_gmt":"2024-10-24T18:41:35","slug":"how-long-should-you-let-a-diesel-engine-warm-up","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/how-long-should-you-let-a-diesel-engine-warm-up\/","title":{"rendered":"How Long Should You Let a Diesel Engine Warm Up?"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column103216_b6869a-39 > .kt-inside-inner-col,.kadence-column103216_b6869a-39 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column103216_b6869a-39 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column103216_b6869a-39 > .kt-inside-inner-col{flex-direction:column;}.kadence-column103216_b6869a-39 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column103216_b6869a-39 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column103216_b6869a-39{position:relative;}@media all and (max-width: 1024px){.kadence-column103216_b6869a-39 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column103216_b6869a-39 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column103216_b6869a-39 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-9730cf  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-f8c45c\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading103216_beeaf6-9a, .wp-block-kadence-advancedheading.kt-adv-heading103216_beeaf6-9a[data-kb-block=\"kb-adv-heading103216_beeaf6-9a\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading103216_beeaf6-9a mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading103216_beeaf6-9a[data-kb-block=\"kb-adv-heading103216_beeaf6-9a\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading103216_beeaf6-9a img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading103216_beeaf6-9a[data-kb-block=\"kb-adv-heading103216_beeaf6-9a\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading103216_beeaf6-9a summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading103216_beeaf6-9a\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You should warm up your diesel engine before driving if it&rsquo;s cold. Engine fluids get thicker when temperatures drop, which means they&rsquo;ll flow through your engine at a slower rate.<\/li>\n\n\n\n<li>It&rsquo;s always best to follow your manufacturer&rsquo;s recommended warm-up time, so that you don&rsquo;t end up preheating your engine for too long. However, it typically only takes 1 to 2 minutes for modern diesel engines to warm up when the temperature is over 50 degrees Fahrenheit.<\/li>\n\n\n\n<li>Some of the benefits of warming up your diesel engine include smoother combustion, less engine stress, and decreased emission levels.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/diesel-engines-how-do-they-work-and-why-do-they-last-so-long\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Diesel engines\">Diesel engines<\/a> are known to be much <a href=\"https:\/\/www.carparts.com\/blog\/7-key-differences-between-diesel-and-gas-engines\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"more fuel-efficient than gas engines\">more fuel-efficient than gas engines<\/a>. They compress air at a much higher ratio and produce more energy per gallon of diesel fuel. Unfortunately, diesel engines don&rsquo;t always perform well when the temperature drops. Cold weather can slow down the combustion process, which is why many vehicle owners recommend warming up your diesel engine before you start driving.<\/p>\n\n\n\n<p>Note that most people don&rsquo;t allow for a warm up unless the weather is really cold; they just let the glow plug &ldquo;wait&rdquo; light go out, fire it up, and drive away, because the engine will warm up anyway once it&rsquo;s started. A diesel doesn&rsquo;t typically warm up as quickly as a gasoline engine and it may take longer to get the coolant flowing through the heater core warm enough for cabin heat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does Preheating Your Engine Mean?<\/h2>\n\n\n\n<p>Preheating your engine is exactly what it sounds like. Before driving away, you warm up your engine for a few minutes. This typically involves activating built-in preheating systems in your vehicle, such as block heaters and coolant heaters.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Should You Warm Up a Diesel Engine Before Driving?<\/h2>\n\n\n\n<p>If it&rsquo;s cold, then yes, you should warm up your diesel engine before driving. Engine oil gets thicker when temperatures drop, which increases the viscosity of the oil (makes it thicker, like cold honey) until it warms up. Coolant and windshield washer fluid can also freeze after a particularly cold night.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Long Should You Let a Diesel Engine Warm Up?<\/h2>\n\n\n\n<p>Your diesel engine&rsquo;s <a href=\"https:\/\/www.carparts.com\/blog\/is-warming-up-the-car-before-driving-necessary-advantages-disadvantages-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"warm-up time\">warm-up time<\/a> will depend on several factors, such as your vehicle&rsquo;s year, make, and model. One of the biggest factors to consider is how cold it is. It typically only takes 1 to 2 minutes for modern diesel engines to warm up when the temperature is over 50 degrees Fahrenheit. If the temperature drops to below zero degrees Fahrenheit, you&rsquo;ll probably need to wait a bit longer.<\/p>\n\n\n\n<p>It&rsquo;s always best to follow your manufacturer&rsquo;s recommended warm-up time, so you don&rsquo;t end up <a href=\"https:\/\/www.carparts.com\/blog\/warming-up-your-car-faster-tips-advantages-and-disadvantages\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"preheating your engine for too long\">preheating your engine for too long<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Are the Downsides of Idle-Warming Diesel Engines?<\/h2>\n\n\n\n<p>Warming up your diesel engine after it&rsquo;s first started is a good idea when the weather turns cold. However, you&rsquo;ll have to be careful of its downsides too. Here are some negative effects that might happen when you your diesel engine by letting it idle:&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Increased Risk of Excessive Idling<\/h3>\n\n\n\n<p>Warming up your engine for too long can lead to excessive idling, which causes your engine to burn more fuel than necessary. To avoid this, it&rsquo;s best to follow the warm-up time recommended by your manufacturer.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dirty Intake Manifold<\/h3>\n\n\n\n<p>Excessive idling can also cause soot to build up faster on your engine&rsquo;s <a href=\"https:\/\/www.carparts.com\/intake-manifold\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"intake manifold\">intake manifold<\/a>, which can interfere with your engine&rsquo;s performance and efficiency.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clogged Diesel Particulate Filter<\/h3>\n\n\n\n<p>Diesel engines come with a <a href=\"https:\/\/www.carparts.com\/diesel-particulate-filter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"diesel particulate filter (DPF)\">diesel particulate filter (DPF)<\/a>, a filter that captures exhaust soot and reduces emission levels. This filter typically has to be emptied to clear soot buildup every now and then, but excessive idling can cause it to clog up faster.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Are the Benefits of Preheating Diesel Engines?<\/h2>\n\n\n\n<p>When done correctly, warming up your diesel engine with a preheater before starting the engine comes with some benefits. Here are a few:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Smoother Combustion<\/h3>\n\n\n\n<p>Warming up your diesel engine before starting it allows the air and fuel mixture in the combustion chamber to heat up first. This ensures that the combustion process starts properly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Less Engine Stress<\/h3>\n\n\n\n<p>Those few minutes you spend waiting for your engine to warm up with a preheater make a big difference when it comes to protecting your engine. By warming up your diesel car before firing it up, you&rsquo;re actually putting less stress on the engine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Decreased Emission Levels<\/h3>\n\n\n\n<p>A cold engine block with a low coolant temperature tends to produce uncombusted hydrocarbons, carbon monoxide, and other major air pollutants. In contrast, a warmed-up engine block has a smoother combustion process that produces less emissions.<\/p>\n\n\n\n<p>A preheater (whatever kind you use) will help the engine start as if the weather was a lot warmer so that it burns cleaner from the first moment of run time.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens if You Start a Diesel Engine Without Preheating?<\/h2>\n\n\n\n<p>Here are a few examples of what happens when you try to start your engine when it&rsquo;s cold:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Increased Wear<\/h3>\n\n\n\n<p>While the oil pump is designed to pick up and move the oil quickly to pressurize the oil gallery, it tends to do this a bit more slowly when the oil is very thick.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Burning More Fuel<\/h3>\n\n\n\n<p>During colder months, fuel efficiency tends to drop during the first few moments of engine operation. One of the reasons for this is that engine fluids get thicker when it&rsquo;s cold, and thicker fluid takes longer to reach the optimum temperature for fuel efficiency.&nbsp;<\/p>\n\n\n\n<p>Of course, allowing the engine to warm up first means the engine is running and using fuel, so running the engine to warm it up doesn&rsquo;t really do much for fuel economy overall, but a warm engine means not burning as much fuel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How To Start a Diesel Engine in the Cold<\/h2>\n\n\n\n<p>Aside from preheating your engine, there are plenty of other ways to help your vehicle warm up. Here are a few tips to help you avoid cold starting your diesel engine:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Make Sure Your Glow Plugs Are in Good Condition if Equipped<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/glow-plug\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Glow plugs\">Glow plugs<\/a> and manifold heaters heat up incoming air to improve fuel combustion in a diesel engine. Unless a diesel has a manifold heater (like Cummins engines), it&rsquo;ll typically have one glow plug for each cylinder. Make sure your vehicle&rsquo;s glow plugs are in good condition, so your fuel combustion can run smoothly.<\/p>\n\n\n<style>.kadence-column103216_c4fb32-0d > .kt-inside-inner-col,.kadence-column103216_c4fb32-0d > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column103216_c4fb32-0d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column103216_c4fb32-0d > .kt-inside-inner-col{flex-direction:column;}.kadence-column103216_c4fb32-0d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column103216_c4fb32-0d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column103216_c4fb32-0d{position:relative;}@media all and (max-width: 1024px){.kadence-column103216_c4fb32-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column103216_c4fb32-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column103216_c4fb32-0d kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id103216_6109a6-99 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id103216_6109a6-99 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id103216_6109a6-99 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id103216_6109a6-99 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id103216_6109a6-99 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id103216_6109a6-99 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id103216_6109a6-99 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id103216_6109a6-99 > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id103216_6109a6-99 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id103216_6109a6-99 alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column103216_63db13-32 > .kt-inside-inner-col{display:flex;}.kadence-column103216_63db13-32 > .kt-inside-inner-col{min-height:45px;}.kadence-column103216_63db13-32 > .kt-inside-inner-col,.kadence-column103216_63db13-32 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column103216_63db13-32 > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column103216_63db13-32 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column103216_63db13-32 > .kt-inside-inner-col > *, .kadence-column103216_63db13-32 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column103216_63db13-32 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column103216_63db13-32 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column103216_63db13-32 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column103216_63db13-32{position:relative;}@media all and (max-width: 1024px){.kadence-column103216_63db13-32 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column103216_63db13-32 > .kt-inside-inner-col > *, .kadence-column103216_63db13-32 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column103216_63db13-32 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column103216_63db13-32 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column103216_63db13-32 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column103216_63db13-32 > .kt-inside-inner-col > *, .kadence-column103216_63db13-32 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column103216_63db13-32 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column103216_63db13-32 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column103216_63db13-32 kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image103216_a280f4-72.kb-image-is-ratio-size, .kb-image103216_a280f4-72 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image103216_a280f4-72.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image103216_a280f4-72 .kb-image-is-ratio-size{align-self:unset;}.kb-image103216_a280f4-72 figure{max-width:45px;}.kb-image103216_a280f4-72 .image-is-svg, .kb-image103216_a280f4-72 .image-is-svg img{width:100%;}.kb-image103216_a280f4-72 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image103216_a280f4-72\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column103216_1ed852-a6 > .kt-inside-inner-col,.kadence-column103216_1ed852-a6 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column103216_1ed852-a6 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column103216_1ed852-a6 > .kt-inside-inner-col{flex-direction:column;}.kadence-column103216_1ed852-a6 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column103216_1ed852-a6 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column103216_1ed852-a6{position:relative;}@media all and (max-width: 1024px){.kadence-column103216_1ed852-a6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column103216_1ed852-a6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column103216_1ed852-a6 inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\n            Newer diesels monitor the glow plugs and will throw a DTC when one or more glow plugs have failed.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Activate Your Vehicle&rsquo;s Block Heaters<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/a-helpful-guide-to-engine-block-heaters\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Block heaters\">Block heaters<\/a> are great if you need additional help in warming up your diesel engine. They&rsquo;re electrical devices that warm the engine and motor oil when the vehicle isn&rsquo;t in use. Most diesel trucks come with built-in block heaters that are easy to use. For most block heaters, you just have to plug the heater cord into an extension cord and then plug the extension cord into a socket with the appropriate voltage. But don&rsquo;t drive off with the cord still connected, or you might ruin something.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use a Diesel Fired Coolant Heater<\/h3>\n\n\n\n<p>Similar to a block heater, a coolant heater can also warm up your diesel engine. It circulates the engine coolant over a heat exchanger, which helps heat the engine, fluids, batteries, and hydraulic tank.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Get New Glow Plugs to Help Your Engine Warm Up Faster<\/h2>\n\n\n\n<p>Warming up your diesel engine is important because it allows the oil to heat up, which lets the engine run more efficiently with less stress. The glow plug is a key part that allows diesel engines to heat up during startup. Without them, starting your vehicle in cold weather can be difficult. Need new glow plugs? CarParts.com is here to help.<\/p>\n\n\n\n<p>Whether you have a truck or SUV, finding a replacement won&rsquo;t be a problem. <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a> offers a wide range of glow plugs that are sure to fit your vehicle perfectly. Take your pick from parts made by only the best aftermarket manufacturers.<\/p>\n\n\n\n<p>It&rsquo;ll only take a few minutes to find the glow plug you need. Simply enter your vehicle&rsquo;s specifications into our vehicle selector to start browsing products for your ride.<\/p>\n\n\n\n<p>Order now, and we&rsquo;ll deliver the <a href=\"https:\/\/www.carparts.com\/glow-plug\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"glow plugs\">glow plugs<\/a> you need straight to your doorstep in as fast as two business days. Don&rsquo;t miss out on the best glow plug deals on our website. Shop now!<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Diesel engines are known to be much more fuel-efficient than gas engines. They compress air at a much higher ratio&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/how-long-should-you-let-a-diesel-engine-warm-up\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":103285,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3767],"tags":[],"ppma_author":[2607,2985],"class_list":{"0":"post-103216","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-driving","8":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Long Should You Let a Diesel Engine Warm Up? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Wondering how long you should warm up your diesel engine? Learn about the benefits and downsides of preheating a diesel engine here.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/how-long-should-you-let-a-diesel-engine-warm-up\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Long Should You Let a Diesel Engine Warm Up? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Wondering how long you should warm up your diesel engine? Learn about the benefits and downsides of preheating a diesel engine here.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/how-long-should-you-let-a-diesel-engine-warm-up\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T04:16:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-10-24T18:41:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/03\/car-engine-shot.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/how-long-should-you-let-a-diesel-engine-warm-up\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/how-long-should-you-let-a-diesel-engine-warm-up\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust."},{"term_id":2985,"user_id":1646,"is_guest":0,"slug":"richardmccuistian","display_name":"Richard McCuistian, ASE Certified Master Automobile Technician","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png"},"author_category":"","user_url":"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/","last_name":"McCuistian","first_name":"Richard","job_title":"ASE Certified Master Automobile Technician","description":"<div class=\"auth-social-links\"><a href=\"https:\/\/www.linkedin.com\/in\/richard-mccuistian-2681891b\/\" class=\"btn\" rel=\"nofollow noopener\" target=\"_blank\" aria-label=\"linkedin\" aria-labelledby=\"linkedin\">LinkedIn<\/a><a href=\"https:\/\/www.youtube.com\/user\/McCuistian\" class=\"btn\" rel=\"nofollow noopener\" target=\"_blank\" aria-label=\"instagram\" aria-labelledby=\"instagram\">Youtube<\/a><\/div>\r\n\r\nRichard McCuistian grew up in Alabama learning from his father who ran an automotive repair shop. Richard has worked for nearly 50 years in the automotive field as a professional technician, an instructor, a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others (published every year since May 2000). He has developed training courses and written or edited training material for companies in the U.S. Canada, and the Netherlands, and even Bulgaria. He maintained an \u201cask a mechanic\u201d website for 10 years answering questions emailed to him from all over the world.\r\n\r\nRichard has an instructional automotive YouTube channel \u201cMcCuistian\u201d with 13,500 subscribers and over 1,300 videos. Much of his professional work requires photography and videography in shop environments, but Richard also enjoys taking pictures of landscapes, skyscapes, old barns and houses, small towns. He has produced a coffee table book of digital watercolors called \u201cMemories of South Alabama\u201d created from his personal photos, along with a dozen Christian fiction short original novels and a collection of short stories, all available in Kindle or softcover format. Richard has written a 2,500-word Bible study every week for the past 20 years and uses it to teach a small group at his church every Sunday morning.\r\n\r\n<strong>Credentials:<\/strong>\r\n\r\n<ul class=\"author-list\">\r\n<li><p>ASE Certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.<\/p><\/li>\r\n<li><p>Professional Mechanic\/Technician for 25 years with experience on diesel and gasoline engines, vehicles and equipment (including hydraulics).<\/p><\/li>\r\n<li><p>Spent 5 years in fleet maintenance, 20 years in independent shops and dealerships (VW, Mazda, Renault, Jeep, Ford, Lincoln), specializing in driveability and electronics for the last 14 years of his career at the same dealership.<\/p><\/li>\r\n<li><p>Senior Contributing Editor at Motor Age Magazine, first published in Motor Age in May of 2000 and every year since. He has won two International Automotive Media Awards for technical articles published in trade magazines.<\/p><\/li>\r\n<li><p>Has attended hundreds of hours of automotive training from OEMs including GM, Volkswagen, Mazda, Renault, Jeep, Chrysler, as well as additional training at events like KC Vision and MACS (Mobile Air Climate Systems Association).<\/p><\/li>\r\n<li><p>Taught college level auto mechanics for 19 years.<\/p><\/li>\r\n<li><p>Has written for automotive training companies (including course development work for training companies in Canada and the Netherlands) and has been hired to teach professional trade show technician courses at multiple training events in Texas and Alabama.<\/p><\/li>\r\n<li><p>While still teaching at the college level, Richard launched a new automotive program in Geneva, Alabama, setting up a dual enrollment department in a new building, organizing the shop and classroom, teaching morning classes to high school students for 2 years while still teaching at the college in the afternoon.<\/p><\/li>\r\n<li><p>Richard\u2019s college program at Lurleen B. Wallace Community College worked at professional shop speed during his tenure to prepare graduates for production level work in the real world.<\/p><\/li>\r\n<\/ul>"}],"_links":{"self":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/103216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/comments?post=103216"}],"version-history":[{"count":0,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/103216\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media\/103285"}],"wp:attachment":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media?parent=103216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/categories?post=103216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/tags?post=103216"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=103216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}