{"id":105057,"date":"2024-04-22T19:20:25","date_gmt":"2024-04-23T02:20:25","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=105057"},"modified":"2024-05-24T04:57:56","modified_gmt":"2024-05-24T11:57:56","slug":"what-is-the-redline-of-an-engine-and-why-is-it-bad-for-your-vehicle","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-is-the-redline-of-an-engine-and-why-is-it-bad-for-your-vehicle\/","title":{"rendered":"What Is the Redline of an Engine and Why Is It Bad for Your Vehicle?"},"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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_52c132-4f > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_52c132-4f > .kt-inside-inner-col,.kadence-column_52c132-4f > .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-column_52c132-4f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_52c132-4f > .kt-inside-inner-col{flex-direction:column;}.kadence-column_52c132-4f > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_52c132-4f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_52c132-4f{position:relative;}@media all and (max-width: 1024px){.kadence-column_52c132-4f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_52c132-4f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_52c132-4f qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-f16c03  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-ddaeaf\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_12f58e-03, .wp-block-kadence-advancedheading.kt-adv-heading_12f58e-03[data-kb-block=\"kb-adv-heading_12f58e-03\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_12f58e-03 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_12f58e-03[data-kb-block=\"kb-adv-heading_12f58e-03\"] 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-heading_12f58e-03 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_12f58e-03[data-kb-block=\"kb-adv-heading_12f58e-03\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_12f58e-03 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_12f58e-03\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>A redline refers to the maximum revolutions per minute (RPM) that&rsquo;s safe for an engine. It&rsquo;s usually displayed as red bars on the tachometer to remind drivers to stay below the redline.<\/li><li>The type of fuel and engine parts are some factors that can determine a vehicle&rsquo;s redline.<\/li><li>Accidentally redlining your engine for a few seconds shouldn&rsquo;t be a problem, but excessively hitting the redline can cause premature engine wear and valve float.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Have you ever had someone ever recommend an Italian tune-up? This means driving your car hard until you redline the engine. Some people believe it flushes carbon deposits and gunk buildup from the engine. However, many more think that redlining an engine does more harm than good.<\/p>\n\n\n<style>.kadence-column_72d7a9-a5 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_72d7a9-a5 > .kt-inside-inner-col,.kadence-column_72d7a9-a5 > .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-column_72d7a9-a5 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_72d7a9-a5 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_72d7a9-a5 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_72d7a9-a5 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_72d7a9-a5{position:relative;}@media all and (max-width: 1024px){.kadence-column_72d7a9-a5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_72d7a9-a5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_72d7a9-a5 kb-section-dir-vertical kb-section-sm-dir-vertical pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>#kt-layout-id_97cf0c-da > .kt-row-column-wrap{align-content:start;}:where(#kt-layout-id_97cf0c-da > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}#kt-layout-id_97cf0c-da > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:var( --global-kb-row-default-top, 25px );padding-bottom:var( --global-kb-row-default-bottom, 25px );padding-top:20px;padding-bottom:20px;padding-left:16px;padding-right:32px;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)));}#kt-layout-id_97cf0c-da > .kt-row-layout-overlay{opacity:0.00;}#kt-layout-id_97cf0c-da .kt-row-layout-bottom-sep{height:100px;}#kt-layout-id_97cf0c-da .kt-row-layout-bottom-sep svg{width:100%;}#kt-layout-id_97cf0c-da .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}#kt-layout-id_97cf0c-da .kt-row-layout-top-sep{height:100px;}#kt-layout-id_97cf0c-da .kt-row-layout-top-sep svg{width:100%;}#kt-layout-id_97cf0c-da .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){#kt-layout-id_97cf0c-da > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){#kt-layout-id_97cf0c-da .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){#kt-layout-id_97cf0c-da .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){#kt-layout-id_97cf0c-da > .kt-row-column-wrap{padding-top:28px;padding-bottom:25px;padding-left:16px;padding-right:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}#kt-layout-id_97cf0c-da .kt-row-layout-bottom-sep{height:px;}#kt-layout-id_97cf0c-da .kt-row-layout-bottom-sep svg{width:%;}}<\/style>\n<div class=\"wp-block-kadence-rowlayout alignnone pro-tip-wrap\"><div id=\"kt-layout-id_97cf0c-da\" class=\"kt-row-layout-inner kt-layout-id_97cf0c-da\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-gutter-none kt-v-gutter-default kt-row-valign-top kt-row-layout-right-golden kt-tab-layout-right-golden kt-m-colapse-left-to-right kt-mobile-layout-right-golden  kt-custom-first-width-10  kt-custom-second-width-90\"><style>.kadence-column_9a14e0-d0 > .kt-inside-inner-col{display:flex;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col{min-height:45px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col,.kadence-column_9a14e0-d0 > .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-column_9a14e0-d0 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col > *, .kadence-column_9a14e0-d0 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_9a14e0-d0 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_9a14e0-d0{position:relative;}@media all and (max-width: 1024px){.kadence-column_9a14e0-d0 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column_9a14e0-d0 > .kt-inside-inner-col > *, .kadence-column_9a14e0-d0 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_9a14e0-d0 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column_9a14e0-d0 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col > *, .kadence-column_9a14e0-d0 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_9a14e0-d0 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_9a14e0-d0 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_9a14e0-d0 kb-section-dir-horizontal kb-section-md-dir-horizontal pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image_c37e74-d4.kb-image-is-ratio-size, .kb-image_c37e74-d4 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image_c37e74-d4.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image_c37e74-d4 .kb-image-is-ratio-size{align-self:unset;}.kb-image_c37e74-d4 figure{max-width:45px;}.kb-image_c37e74-d4 .image-is-svg, .kb-image_c37e74-d4 .image-is-svg img{width:100%;}.kb-image_c37e74-d4 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image_c37e74-d4\"><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-column_72da3f-3b > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_72da3f-3b > .kt-inside-inner-col,.kadence-column_72da3f-3b > .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-column_72da3f-3b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_72da3f-3b > .kt-inside-inner-col{flex-direction:column;}.kadence-column_72da3f-3b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_72da3f-3b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_72da3f-3b{position:relative;}@media all and (max-width: 1024px){.kadence-column_72da3f-3b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_72da3f-3b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-2 kadence-column_72da3f-3b 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            Modern fuel injected engines have a rev limiter built into the ECM\/PCM, meaning, they&rsquo;ll shut the injectors off cyclically if the engine or the vehicle reaches a dangerous speed. That being said, any engine can be destroyed by redlining it too much.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What Is the Redline of an Engine?<\/h2>\n\n\n\n<p>If there&rsquo;s one thing engines have in common, it&rsquo;s that they all have a redline. A redline refers to the maximum RPM that&rsquo;s safe for an engine. It&rsquo;s usually displayed as red bars on the <a href=\"https:\/\/www.carparts.com\/tachometer\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"tachometer\">tachometer<\/a> to remind drivers to stay below the redline.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Factors Determine an Engine&rsquo;s Redline?<\/h2>\n\n\n\n<p>Not every vehicle has the same redline. It can vary depending on your car&rsquo;s year, make, and model, but it can also depend on these factors:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Type of Fuel<\/h3>\n\n\n\n<p>Unlike petrol engines, diesel engines aren&rsquo;t designed for high RPM. Diesel engines don&rsquo;t use spark plugs, which results in a slower combustion process than petrol engines. Although this helps them achieve higher torque at a lower speed, this also causes them to operate at a lower RPM and have a lower redline. Diesel engines usually have a redline of around 4,500 RPM, while petrol engines redline at 7,000 to 8,000 RPM.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Engine Parts<\/h3>\n\n\n\n<p>The mass, composition, and interrelated balance of your engine parts can also affect your vehicle&rsquo;s redline. Large, heavy, engines in trains and generators usually have a redline of a few hundred RPM. Meanwhile, the redline of smaller, high-performance engines in sports cars is usually around 5,500 to 7,000 RPM. Some motorcycles can even reach 19,000 RPM, thanks to their lower reciprocating mass.<\/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\">Can Redlining Harm Your Engine?<\/h2>\n\n\n\n<p>You don&rsquo;t have to panic if you briefly redlined your car. To determine a vehicle&rsquo;s redline, manufacturers test the highest engine RPM that still allows the engine to safely operate. As long as you only redline for a few seconds, it shouldn&rsquo;t be a problem. Of course, this doesn&rsquo;t mean you can just redline your car whenever you want. Here are a few ways constantly hitting the redline can damage your vehicle:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Premature Engine Wear<\/h3>\n\n\n\n<p>Redlining for hours can cause your engine to overheat, which can negatively affect engine performance and cause premature wear. Unless you want to deal with an overheating engine, you&rsquo;ll have to keep a close eye on the redline on your tachometer.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Valve Float<\/h3>\n\n\n\n<p>Redlining an engine can cause valve float, which can permanently damage the valvetrain and pistons.<\/p>\n\n\n\n<p>A valve float can either happen when the lifter is thrown off the nose of the cam lobe or when the valve bounces off its seat before it settles. This can lead to compression loss, engine misfires, and damaged valves and pistons.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/05\/car-pushrod-1024x768.jpg\" alt=\"car pushrod image\" class=\"wp-image-107091\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/05\/car-pushrod-1024x768.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/05\/car-pushrod-300x225.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/05\/car-pushrod-768x576.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/05\/car-pushrod-150x113.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/05\/car-pushrod.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>This pushrod and some others on this engine punched through the rocker arm while redlining. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How To Prevent Redlining<\/h2>\n\n\n\n<p>While accidentally redlining your engine for a couple of seconds is okay, it never hurts to be more careful. Here are a few tips on how to prevent redlining:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Use a Rev Limiter<\/h3>\n\n\n\n<p>Again, most modern cars come equipped with a rev limiter that prevents the engine from redlining. Once the rev limiter detects that the engine&rsquo;s RPM is redlining, it cuts off the fuel flow or disables the ignition system until the RPM drops to a safer speed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Shift Gears<\/h3>\n\n\n\n<p>Accidentally redlining a manual vehicle is a lot more common than you think, but there are ways to prevent this. You can make sure your engine stays below the redline by shifting gears. A manual transmission&rsquo;s input shaft spins at the same RPM as the engine. In a five-speed transmission, there are five gear ratios that yield different RPM values for the output shaft. By shifting gears, you stay within that range while maximizing your engine&rsquo;s performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Switch to a CVT<\/h3>\n\n\n\n<p>Unlike other types of mechanical transmissions, continuously variable transmissions (CVT) seamlessly change through an unending range of gear ratios while you drive. When the CVT switches gears, the engine keeps running at a set RPM. This allows you to stay below the redline while staying close to your engine&rsquo;s optimal performance range. Note that switching to a CT is easier said than done.<\/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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Have you ever had someone ever recommend an Italian tune-up? This means driving your car hard until you redline the&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-is-the-redline-of-an-engine-and-why-is-it-bad-for-your-vehicle\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":105173,"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":[52,3747],"tags":[],"ppma_author":[2607,2985],"class_list":{"0":"post-105057","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-engine","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is the Redline of an Engine and Why Is It Bad for Your Vehicle? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Worried about redlining your engine? Learn what redline means in an engine, what factors determine it, and how to avoid it 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\/what-is-the-redline-of-an-engine-and-why-is-it-bad-for-your-vehicle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is the Redline of an Engine and Why Is It Bad for Your Vehicle? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Worried about redlining your engine? 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