{"id":86640,"date":"2023-07-05T03:19:11","date_gmt":"2023-07-05T10:19:11","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=86640"},"modified":"2024-05-30T16:03:26","modified_gmt":"2024-05-30T23:03:26","slug":"bad-oil-cooler-symptoms","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/bad-oil-cooler-symptoms\/","title":{"rendered":"Bad Oil Cooler Symptoms"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<!-- Added by Post\/Page Specific Custom Code plugin, thank you for using! --><html><head><style>#article-search-widget {display: none;}<\/style>\n<\/head><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-column_263910-d6 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_263910-d6 > .kt-inside-inner-col,.kadence-column_263910-d6 > .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_263910-d6 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_263910-d6 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_263910-d6 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_263910-d6 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_263910-d6{position:relative;}@media all and (max-width: 1024px){.kadence-column_263910-d6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_263910-d6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_263910-d6 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-126015  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-991c66\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_92aaac-e1, .wp-block-kadence-advancedheading.kt-adv-heading_92aaac-e1[data-kb-block=\"kb-adv-heading_92aaac-e1\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_92aaac-e1 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_92aaac-e1[data-kb-block=\"kb-adv-heading_92aaac-e1\"] 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_92aaac-e1 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_92aaac-e1[data-kb-block=\"kb-adv-heading_92aaac-e1\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_92aaac-e1 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_92aaac-e1\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The oil cooler is responsible for keeping the oil within its ideal operating temperature, which is around 230 to 260 degrees Fahrenheit.<\/li><li>There are oil-to-water oil coolers and oil-to-air oil coolers. Oil-to-water oil coolers transfer heat to coolant, which is dissipating through the radiator. Oil-to-air oil coolers have dedicated heat exchangers dedicated to oil.<\/li><li>A faulty oil cooler will leak oil, have coolant leaks, cause oil to mix with coolant, illuminate your vehicle&rsquo;s warning lights, and create strange noises.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>What is an oil cooler? <a href=\"https:\/\/www.carparts.com\/oil-cooler\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Oil coolers\">Oil coolers<\/a> function as an extra cooling device for the engine since they create a tremendous amount of heat. Vehicle engines have cooling systems that send water or <a href=\"https:\/\/www.carparts.com\/coolant-antifreeze\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"coolant\">coolant<\/a> through coolant channels in the engine to dissipate heat. However, engine oil also needs to be cooled because it flows around the pistons, crankshaft, and valves, which can get extremely hot because of their proximity to the combustion chamber. If engine oil heats up too much, it will lose its lubricating and cooling ability. High oil temperatures also accelerate oil breakdown, causing engine oil to turn into sludge and deposits and cause a wide range of engine issues.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does an Oil Cooler Do?<\/h2>\n\n\n\n<p>The oil cooler is responsible for keeping the oil within its ideal operating temperature, which is around 230 to 260 degrees Fahrenheit. Oil coolers are essentially heat exchangers, which are components that function similarly to a vehicle&rsquo;s <a href=\"https:\/\/www.carparts.com\/radiator\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"radiator\">radiator<\/a>. These components are designed to have a lot of surface area, so that they can radiate as much heat as possible to the surrounding air or coolant, depending on the type of oil cooler. Oil-to-air oil coolers are typically located behind the vehicle&rsquo;s grilles, near its radiator. This location provides the maximum amount of airflow, which is necessary for heat to dissipate effectively.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Does an Oil Cooler Work?<\/h2>\n\n\n\n<p>There are two types of oil coolers. There are oil-to-water oil coolers and oil-to-air oil coolers.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Oil-to-Water Oil Coolers&nbsp;<\/h3>\n\n\n\n<p>Hot oil that comes from the engine block is fed through the oil cooler&rsquo;s tubes. Engine coolant or water from the vehicle&rsquo;s cooling system flows around these tubes. The oil heats up the tubes and this heat is absorbed by the surrounding coolant or water. This coolant is then directed to the vehicle&rsquo;s radiator, which dissipates the heat using air.<\/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\/2023\/08\/dodge-durango-oil-to-water-oil-cooler-1024x890.jpg\" alt=\"dodge durango oil to water oil cooler\" class=\"wp-image-89539\" width=\"1024\" height=\"890\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/dodge-durango-oil-to-water-oil-cooler-1024x890.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/dodge-durango-oil-to-water-oil-cooler-300x261.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/dodge-durango-oil-to-water-oil-cooler-768x668.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/dodge-durango-oil-to-water-oil-cooler-150x130.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/dodge-durango-oil-to-water-oil-cooler.jpg 1323w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A Dodge Durango oil-to-water oil cooler | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Oil-to-Air Oil Coolers<\/h3>\n\n\n\n<p>These oil coolers work similarly to the vehicle&rsquo;s radiator. The oil is sent to the heat exchanger, which is a set of thin tubes that have many thin metal fins connected to them. The thin tubes and metal fins allow heat to quickly dissipate through the surrounding air. These oil coolers will leak oil onto the ground but won&rsquo;t leak oil into the coolant.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-to-air-oil-cooler.jpg\" alt=\"oil to air oil cooler\" class=\"wp-image-89540\" width=\"978\" height=\"426\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-to-air-oil-cooler.jpg 978w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-to-air-oil-cooler-300x131.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-to-air-oil-cooler-768x335.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-to-air-oil-cooler-150x65.jpg 150w\" sizes=\"(max-width: 978px) 100vw, 978px\"><figcaption>An oil-to-air oil cooler | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Faulty Oil Cooler Symptoms<\/h2>\n\n\n\n<p>Oil coolers in cars wear out over time and can eventually fail. When this happens, your vehicle will show several possible symptoms such as the following:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Oil Leaks<\/h3>\n\n\n\n<p>An oil cooler adapter connects the engine&rsquo;s oil lines to the oil cooler. If the oil cooler adapter or the o-ring that connects the oil cooler to the adapter is damaged, then oil can leak out of the engine and create puddles under your vehicle. The oil cooler can also leak oil.<\/p>\n\n\n\n<p>Having an oil cooler that leaks is a serious issue because it can cause low oil levels, which will deprive your engine of oil&rsquo;s lubricating and cooling properties. Eventually, low oil levels can cause your engine to overheat or even seize. If you notice oil leaking from your vehicle, we recommend that you reach out to a trusted mechanic so that they find where the leak is coming from and seal it off immediately.<\/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<!-- Error, Advert is not available at this time due to schedule\/geolocation restrictions! -->\n\n\n<h3 class=\"wp-block-heading\">Coolant Leaks<\/h3>\n\n\n\n<p>Since oil-to-water oil coolants use oil or water, a damaged oil cooler can <a href=\"https:\/\/www.carparts.com\/blog\/coolant-leak-symptoms-plus-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"leak coolant\">leak coolant<\/a>. When this happens, your vehicle&rsquo;s coolant reserves can get low. This can cause your vehicle to overheat.<\/p>\n\n\n\n<p>An overheating engine will cause pistons to warp, gaskets to leak, and can even crack the engine block. The engine might also make horrible knocking and grinding noises. If kept running, the engine can get severely damaged or seize.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Oil Mixing With Coolant<\/h3>\n\n\n\n<p>The oil cooler is designed to contain both oil and coolant in separate compartments. A damaged&nbsp;oil cooler can develop small internal cracks that can cause oil and coolant to mix.<\/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\/2023\/08\/oil-tends-to-make-its-way-into-the-coolant-if-oil-cooler-is-the-issue-1024x414.jpg\" alt=\"oil tends to make its way into the coolant if oil cooler is the issue\" class=\"wp-image-89541\" width=\"1024\" height=\"414\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-tends-to-make-its-way-into-the-coolant-if-oil-cooler-is-the-issue-1024x414.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-tends-to-make-its-way-into-the-coolant-if-oil-cooler-is-the-issue-300x121.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-tends-to-make-its-way-into-the-coolant-if-oil-cooler-is-the-issue-768x310.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-tends-to-make-its-way-into-the-coolant-if-oil-cooler-is-the-issue-150x61.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/oil-tends-to-make-its-way-into-the-coolant-if-oil-cooler-is-the-issue.jpg 1398w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Since pressure in the oil cooler is always higher than cooling system pressure, and the cooler is pressurized with the oil that is flowing through it, the oil tends to make its way into the coolant rather than vice versa if the oil cooler is the issue. | Image Source: Richard McCuistian<\/figcaption><\/figure>\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\/2023\/08\/coolant-in-the-oil-caused-by-a-blown-intake-gasket-1024x768.jpg\" alt=\"coolant in the oil caused by a blown intake gasket\" class=\"wp-image-89542\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/coolant-in-the-oil-caused-by-a-blown-intake-gasket-1024x768.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/coolant-in-the-oil-caused-by-a-blown-intake-gasket-300x225.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/coolant-in-the-oil-caused-by-a-blown-intake-gasket-768x576.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/coolant-in-the-oil-caused-by-a-blown-intake-gasket-1536x1152.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/coolant-in-the-oil-caused-by-a-blown-intake-gasket-150x113.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/coolant-in-the-oil-caused-by-a-blown-intake-gasket.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>If there is coolant in the oil, this will typically be the result of a blown intake gasket. The location of the contamination is a good indicator of whether the oil cooler has failed as opposed to something like an intake gasket. Check the dipstick and under the oil filler cap for large amounts of this. Small amounts might just be a cold-running engine, so be careful when diagnosing the issue. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>The coolant in your reservoir will turn into a thick, discolored fluid that resembles gravy if it&rsquo;s mixed with oil. Similarly, your engine&rsquo;s oil will also change its color and consistency.<\/p>\n\n\n<style>.kadence-column_949244-c8 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_949244-c8 > .kt-inside-inner-col,.kadence-column_949244-c8 > .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_949244-c8 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_949244-c8 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_949244-c8 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_949244-c8 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_949244-c8{position:relative;}@media all and (max-width: 1024px){.kadence-column_949244-c8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_949244-c8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_949244-c8 kb-section-dir-vertical kb-section-sm-dir-vertical pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>#kt-layout-id_5c2e0d-0a > .kt-row-column-wrap{align-content:start;}:where(#kt-layout-id_5c2e0d-0a > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}#kt-layout-id_5c2e0d-0a > .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_5c2e0d-0a > .kt-row-layout-overlay{opacity:0.00;}#kt-layout-id_5c2e0d-0a .kt-row-layout-bottom-sep{height:100px;}#kt-layout-id_5c2e0d-0a .kt-row-layout-bottom-sep svg{width:100%;}#kt-layout-id_5c2e0d-0a .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}#kt-layout-id_5c2e0d-0a .kt-row-layout-top-sep{height:100px;}#kt-layout-id_5c2e0d-0a .kt-row-layout-top-sep svg{width:100%;}#kt-layout-id_5c2e0d-0a .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){#kt-layout-id_5c2e0d-0a > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){#kt-layout-id_5c2e0d-0a .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){#kt-layout-id_5c2e0d-0a .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){#kt-layout-id_5c2e0d-0a > .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_5c2e0d-0a .kt-row-layout-bottom-sep{height:px;}#kt-layout-id_5c2e0d-0a .kt-row-layout-bottom-sep svg{width:%;}}<\/style>\n<div class=\"wp-block-kadence-rowlayout alignnone pro-tip-wrap\"><div id=\"kt-layout-id_5c2e0d-0a\" class=\"kt-row-layout-inner kt-layout-id_5c2e0d-0a\"><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_cd89f7-2b > .kt-inside-inner-col{display:flex;}.kadence-column_cd89f7-2b > .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_cd89f7-2b > .kt-inside-inner-col,.kadence-column_cd89f7-2b > .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_cd89f7-2b > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column_cd89f7-2b > .kt-inside-inner-col > *, .kadence-column_cd89f7-2b > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_cd89f7-2b > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_cd89f7-2b > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column_cd89f7-2b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_cd89f7-2b{position:relative;}@media all and (max-width: 1024px){.kadence-column_cd89f7-2b > .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_cd89f7-2b > .kt-inside-inner-col > *, .kadence-column_cd89f7-2b > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_cd89f7-2b > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_cd89f7-2b > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column_cd89f7-2b > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column_cd89f7-2b > .kt-inside-inner-col > *, .kadence-column_cd89f7-2b > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_cd89f7-2b > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_cd89f7-2b > .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_cd89f7-2b kb-section-dir-horizontal kb-section-md-dir-horizontal pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image_9817c2-e4.kb-image-is-ratio-size, .kb-image_9817c2-e4 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image_9817c2-e4.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image_9817c2-e4 .kb-image-is-ratio-size{align-self:unset;}.kb-image_9817c2-e4 figure{max-width:45px;}.kb-image_9817c2-e4 .image-is-svg, .kb-image_9817c2-e4 .image-is-svg img{width:100%;}.kb-image_9817c2-e4 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image_9817c2-e4\"><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_c5c196-bb > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_c5c196-bb > .kt-inside-inner-col,.kadence-column_c5c196-bb > .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_c5c196-bb > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_c5c196-bb > .kt-inside-inner-col{flex-direction:column;}.kadence-column_c5c196-bb > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_c5c196-bb > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_c5c196-bb{position:relative;}@media all and (max-width: 1024px){.kadence-column_c5c196-bb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_c5c196-bb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-2 kadence-column_c5c196-bb 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            The more oil there is in the coolant, the thicker and uglier it will get.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/what-is-the-normal-temperature-of-engine-oil\/\" target=\"_self\" rel=\"dofollow\" class=\"ue5bc9056a884af9c125a3b6b9acfaee1\"><style> .ue5bc9056a884af9c125a3b6b9acfaee1 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .ue5bc9056a884af9c125a3b6b9acfaee1:active, .ue5bc9056a884af9c125a3b6b9acfaee1:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .ue5bc9056a884af9c125a3b6b9acfaee1 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .ue5bc9056a884af9c125a3b6b9acfaee1 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .ue5bc9056a884af9c125a3b6b9acfaee1 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .ue5bc9056a884af9c125a3b6b9acfaee1:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">What is the Normal Temperature of Engine Oil?<\/span><\/div><\/a><\/div><\/div>\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\/2023\/08\/flushing-after-oil-cooler-failed-and-contaminated-the-coolant-1024x620.jpg\" alt=\"flushing after oil cooler failed and contaminated the coolant\" class=\"wp-image-89543\" width=\"1024\" height=\"620\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/flushing-after-oil-cooler-failed-and-contaminated-the-coolant-1024x620.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/flushing-after-oil-cooler-failed-and-contaminated-the-coolant-300x182.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/flushing-after-oil-cooler-failed-and-contaminated-the-coolant-768x465.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/flushing-after-oil-cooler-failed-and-contaminated-the-coolant-150x91.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/08\/flushing-after-oil-cooler-failed-and-contaminated-the-coolant.jpg 1189w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>This Saturn oil cooler failed and contaminated the coolant. It took a lot of flushing and dishwashing liquid to take care of this issue. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Illuminated Warning Lights<\/h3>\n\n\n\n<p>Most modern vehicles come with sensors that can detect engine oil and cooling system problems. If the oil cooler fails, it can cause warning lights to illuminate on the dashboard. These can include the <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check engine light\">check engine light<\/a>, the <a href=\"https:\/\/www.carparts.com\/blog\/what-does-the-oil-light-mean-and-can-i-drive-if-its-on\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oil pressure warning light\">oil pressure warning light<\/a>, and the <a href=\"https:\/\/www.carparts.com\/blog\/coolant-temperature-warning-light-meaning-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine temperature warning light\">engine temperature warning light<\/a>. If you see any warning lights on your dashboard, you ask an experienced mechanic to inspect your car.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Strange Noises<\/h3>\n\n\n\n<p>A faulty oil cooler can also cause strange noises like knocking, ticking, or rattling. These noises could suggest severe engine damage as a result of low oil or coolant levels. You might also feel excess vibrations from your vehicle.<\/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>What is an oil cooler? Oil coolers function as an extra cooling device for the engine since they create a&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/bad-oil-cooler-symptoms\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":86743,"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":[3753,52],"tags":[3680],"ppma_author":[2607,2985],"class_list":{"0":"post-86640","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-cooling-system","8":"category-diy","9":"tag-oil-cooler","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"468","adrotate_specific_desktop_ad":"467"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bad Oil Cooler Symptoms - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Oil coolers are critical in keeping your car\u2019s engine oil cool. 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