{"id":107638,"date":"2024-06-05T04:11:59","date_gmt":"2024-06-05T11:11:59","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=107638"},"modified":"2026-04-22T23:13:57","modified_gmt":"2026-04-23T06:13:57","slug":"how-to-inspect-car-coolant-hoses","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/how-to-inspect-car-coolant-hoses\/","title":{"rendered":"How To Inspect Car Coolant Hoses"},"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-column107638_f70228-f0 > .kt-inside-inner-col,.kadence-column107638_f70228-f0 > .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-column107638_f70228-f0 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column107638_f70228-f0 > .kt-inside-inner-col{flex-direction:column;}.kadence-column107638_f70228-f0 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column107638_f70228-f0 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column107638_f70228-f0{position:relative;}@media all and (max-width: 1024px){.kadence-column107638_f70228-f0 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column107638_f70228-f0 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column107638_f70228-f0 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-9b4974  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-85a0d7\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading107638_3a64d0-98, .wp-block-kadence-advancedheading.kt-adv-heading107638_3a64d0-98[data-kb-block=\"kb-adv-heading107638_3a64d0-98\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading107638_3a64d0-98 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading107638_3a64d0-98[data-kb-block=\"kb-adv-heading107638_3a64d0-98\"] 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-heading107638_3a64d0-98 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading107638_3a64d0-98[data-kb-block=\"kb-adv-heading107638_3a64d0-98\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading107638_3a64d0-98 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading107638_3a64d0-98\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>To inspect your coolant hoses, let your engine warm first. Then, you can perform a squeeze test and visually inspect the hoses for any cracks.<\/li>\n\n\n\n<li>When inspecting your coolant hoses, don&rsquo;t forget to check on the clamps too.<\/li>\n\n\n\n<li>Electrochemical degradation (EGD), leakage, and ozone damage are some of the common types of hose failure.<\/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\/coolant-reservoir-hose\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Coolant hoses\">Coolant hoses<\/a> are built to last. Typically made from durable rubber, coolant hoses can last for several years before they show signs of wear. However, constant exposure to high temperatures inside the engine can speed up the deterioration process for some. To prevent coolant leaks and other major issues in the cooling system, it&rsquo;s best to inspect your car&rsquo;s coolant hoses every 3,000 miles or so.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How To Inspect Your Coolant Hoses<\/h2>\n\n\n\n<p>Here are some helpful tips on how to inspect your coolant hoses:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Let Your Engine Warm<\/h3>\n\n\n\n<p>It&rsquo;s best to inspect your hoses when your engine is still warm. That way, you can easily find any swollen or ballooning parts on the hose. You can also look for small, damp spots at the hose ends, where coolant might have leaked.<\/p>\n\n\n\n<p>Dealing with a hot engine is dangerous, so be extra careful. Wear protective gear like safety goggles and gloves, and wear thick clothing that covers your arms.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Perform a Visual Inspection<\/h3>\n\n\n\n<p>The photos below show one hose that is about to burst and one that already has.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/swollen-engine-coolant-hose-1024x768.jpg\" alt=\"image of a swollen engine coolant hose\" class=\"wp-image-109806\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/swollen-engine-coolant-hose-1024x768.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/swollen-engine-coolant-hose-300x225.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/swollen-engine-coolant-hose-768x576.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/swollen-engine-coolant-hose-150x113.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/swollen-engine-coolant-hose.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The swollen hose in this photo is very dangerous. If you see this, back away, circle around, and switch off the engine. Wait until the engine cools down before you replace the hose. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"566\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/old-engine-coolant-hose-1024x566.jpg\" alt=\"an image of a broken and engine coolant hose\" class=\"wp-image-109807\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/old-engine-coolant-hose-1024x566.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/old-engine-coolant-hose-300x166.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/old-engine-coolant-hose-768x424.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/old-engine-coolant-hose-150x83.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/old-engine-coolant-hose.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">This photo shows a very old hose that burst due to dry rotting. This kind of failure can destroy the engine before you know it if you don&rsquo;t see the steam and pull over first. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"662\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/engine-coolant-hose-with-leak-1024x662.jpg\" alt=\"engine coolant hose with coolant leak\" class=\"wp-image-109808\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/engine-coolant-hose-with-leak-1024x662.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/engine-coolant-hose-with-leak-300x194.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/engine-coolant-hose-with-leak-768x497.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/engine-coolant-hose-with-leak-150x97.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/engine-coolant-hose-with-leak.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">This isn&rsquo;t a faulty hose, but there is a coolant leak where the hose connects to the thermostat housing that needs to be addressed with a good cleaning, a fresh clamp, and\/or a possible housing replacement. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Perform a Squeeze Test<\/h3>\n\n\n\n<p>Gently squeeze the radiator hoses and check for any hard parts. A coolant hose that&rsquo;s in good condition should feel firm but not too hard or too soft. It should retain its shape and spring back to its original form after squeezing. If it feels hard, soft, or spongy at any point, the entire hose should be replaced.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Look for Cracks<\/h3>\n\n\n\n<p>Visually inspect each hose for any cracks or fraying. Even the tiniest crack can lead to a big leak, so be sure to replace the hose if you find any damage. You can also check if any hoses are touching sharp edges or hot engine parts, which can cause them to wear faster.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Check the Clamps<\/h3>\n\n\n\n<p>Clamps secure coolant hoses to the radiator and engine. Over time, however, they can fail and lead to coolant leaks. When inspecting your hoses, take the time to also check their clamps for any signs of damage.<\/p>\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">What Are the Common Types of Hose Failure?<\/h2>\n\n\n\n<p>To say that your vehicle&rsquo;s coolant hoses go through a lot might be an understatement. They&rsquo;re constantly exposed to high temperatures and harsh chemicals, so it&rsquo;s only natural that they&rsquo;ll wear over time. Here are the common types of hose failure:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Electrochemical Degradation<\/h3>\n\n\n\n<p>Electrochemical degradation, or ECD for short, isn&rsquo;t easy to detect. It attacks the coolant line from the inside, causing tiny cracks that can eventually cause the hose to rupture.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Happens to the Hose?<\/h4>\n\n\n\n<p>Check the first two inches from the hose ends, where ECD damage can usually be found. Hoses weakened by ECD also have softer ends and will feel as if they have gaps inside when squeezed.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Is the Cause?<\/h4>\n\n\n\n<p>Your cooling system consists of parts that are all made from different kinds of metal. These various metals generate an electrical charge that is then carried by the coolant. This electric charge can cause small cracks in the hose.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How Do I Fix It?<\/h4>\n\n\n\n<p>You&rsquo;ll have to replace the damaged hose with a new one.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Leakage<\/h3>\n\n\n\n<p>If you find a pool of coolant under your parked car, there&rsquo;s a big chance you&rsquo;re dealing with a leaking coolant hose. This can lead to an <a href=\"https:\/\/www.carparts.com\/blog\/what-type-of-damage-to-expect-from-an-overheating-car\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"overheating engine\">overheating engine<\/a> and drips of coolant leaking into the engine bay.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Happens to the Hose?<\/h4>\n\n\n\n<p>You&rsquo;ll find coolant marks on or around the clamps, connectors, or on the hose itself.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Is the Cause?<\/h4>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/coolant-leak-symptoms-plus-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Coolant leakage\">Coolant leakage<\/a> is typically caused by worn hoses, deteriorated connectors, and insufficient clamp torque.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How Do I Fix It?<\/h4>\n\n\n\n<p>You can try retightening the clamps or switching to constant-tension clamps. If you&rsquo;re dealing with worn hoses, you&rsquo;ll have to replace them.<\/p>\n\n\n\n<div class=\"rsi-card\">\n  <div class=\"rsi-thumb\">\n    <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/d_noimage.jpg\/b_white\/e_sharpen,e_auto_brightness,e_auto_contrast\/f_auto\/q_auto:eco,dpr_auto\/w_873,h_873,c_pad\/images\/prmaprh0351_9\">\n  <\/div>\n  <div class=\"rsi-info\">\n    <span class=\"rsi-title\">Radiator Hose Shopping: A One-Job Order Sheet for an Easy Fix<\/span>\n    <span class=\"rsi-desc\">Check out this practical radiator hose guide that'll help you build the right cart for the job, avoid fitment mistakes, and finish the repair once.<\/span>\n    <a href=\"https:\/\/www.carparts.com\/blog\/radiator-hose-shopping-a-one-job-order-sheet-for-an-easy-fix-quickref\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Discover Your Options\">Discover Your Options<\/a>\n  <\/div>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Heat Damage<\/h3>\n\n\n\n<p>Coolant hoses are specifically designed to hold up against high temperatures, but they don&rsquo;t last forever. They can still wear over time and suffer from heat damage.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Happens to the Hose?<\/h4>\n\n\n\n<p>Hoses damaged by extreme heat will feel hard and look glossy with a cracked outer surface. If the hose is damaged inside, it will also look swollen.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Is the Cause?<\/h4>\n\n\n\n<p>Constant exposure to engine heat, sudden temperature spikes, and low coolant levels can lead to heat damage.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How Do I Fix It?<\/h4>\n\n\n\n<p>You&rsquo;ll have to replace the entire hose.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ozone Damage<\/h3>\n\n\n\n<p>Over the years, pollution has gradually gotten worse, causing ozone levels to rise. This can damage your vehicle just as much as it hurts the environment.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Happens to the Hose?<\/h4>\n\n\n\n<p>Coolant hoses suffering from ozone damage will have tiny, parallel cracks on their outer surface.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Is the Cause?<\/h4>\n\n\n\n<p>Higher ozone levels damage the bonds in certain rubber compounds, causing the hose to deteriorate and crack. This allows dirt and other debris to enter the system.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How Do I Fix It?<\/h4>\n\n\n\n<p>Replace your cracked hose with a new one made from ethylene propylene diene monomer (EPDM). It&rsquo;s a type of synthetic rubber that can withstand extreme conditions and last longer than natural rubber.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Abrasion Damage<\/h3>\n\n\n\n<p>Some engines have gotten smaller. They&rsquo;ve become so compact that coolant hoses sometimes rub against other hot and moving engine parts.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Happens to the Hose?<\/h4>\n\n\n\n<p>You&rsquo;ll find rub marks, holes, and cracks on the hose&rsquo;s outer surface.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Is the Cause?<\/h4>\n\n\n\n<p>Abrasion damage is caused by constant friction between parts of the engine and the coolant hose.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How Do I Fix It?<\/h4>\n\n\n\n<p>You can try rerouting the hose or installing a protective hose cover, sleep, or wrap. If the hose is badly damaged, however, you&rsquo;ll have to replace it first.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Oil Contamination<\/h3>\n\n\n\n<p>Coolant hoses are typically made of rubber, which can react negatively when exposed to oil and other petroleum-based products. This is why oil contamination is another common type of hose failure.<\/p>\n\n\n<style>.kadence-column107638_b05d27-35 > .kt-inside-inner-col,.kadence-column107638_b05d27-35 > .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-column107638_b05d27-35 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column107638_b05d27-35 > .kt-inside-inner-col{flex-direction:column;}.kadence-column107638_b05d27-35 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column107638_b05d27-35 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column107638_b05d27-35{position:relative;}@media all and (max-width: 1024px){.kadence-column107638_b05d27-35 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column107638_b05d27-35 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column107638_b05d27-35 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-id107638_bc7ec3-56 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id107638_bc7ec3-56 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id107638_bc7ec3-56 > .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-id107638_bc7ec3-56 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id107638_bc7ec3-56 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id107638_bc7ec3-56 > .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-id107638_bc7ec3-56 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id107638_bc7ec3-56 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id107638_bc7ec3-56 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-column107638_7f5213-25 > .kt-inside-inner-col{display:flex;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col{min-height:45px;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col,.kadence-column107638_7f5213-25 > .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-column107638_7f5213-25 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column107638_7f5213-25 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col > *, .kadence-column107638_7f5213-25 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column107638_7f5213-25 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column107638_7f5213-25{position:relative;}@media all and (max-width: 1024px){.kadence-column107638_7f5213-25 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column107638_7f5213-25 > .kt-inside-inner-col > *, .kadence-column107638_7f5213-25 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column107638_7f5213-25 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column107638_7f5213-25 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col > *, .kadence-column107638_7f5213-25 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column107638_7f5213-25 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column107638_7f5213-25 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column107638_7f5213-25 kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image107638_b3479a-2c.kb-image-is-ratio-size, .kb-image107638_b3479a-2c .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image107638_b3479a-2c.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image107638_b3479a-2c .kb-image-is-ratio-size{align-self:unset;}.kb-image107638_b3479a-2c figure{max-width:45px;}.kb-image107638_b3479a-2c .image-is-svg, .kb-image107638_b3479a-2c .image-is-svg img{width:100%;}.kb-image107638_b3479a-2c .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image107638_b3479a-2c\"><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-column107638_67a52e-05 > .kt-inside-inner-col,.kadence-column107638_67a52e-05 > .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-column107638_67a52e-05 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column107638_67a52e-05 > .kt-inside-inner-col{flex-direction:column;}.kadence-column107638_67a52e-05 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column107638_67a52e-05 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column107638_67a52e-05{position:relative;}@media all and (max-width: 1024px){.kadence-column107638_67a52e-05 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column107638_67a52e-05 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column107638_67a52e-05 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            An oil leak that keeps a hose damp with engine oil will cause it to swell and eventually burst.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">What Happens to the Hose?<\/h4>\n\n\n\n<p>Coolant hoses will feel soft or spongy when squeezed. Oil can also cause coolant hoses to bulge and swell.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">What Is the Cause?<\/h4>\n\n\n\n<p>Oil and other petroleum-based products attack and weaken rubber compounds, causing the coolant hose to soften. Internal damage can happen when the coolant is contaminated with oil, while external damage can occur when a failed head gasket causes oil to leak into the cooling system.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How Do I Fix It?<\/h4>\n\n\n\n<p>Replace the degraded hose and address the source of the oil leak.<\/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>Coolant hoses are built to last. Typically made from durable rubber, coolant hoses can last for several years before they&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/how-to-inspect-car-coolant-hoses\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":107825,"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":[3412],"ppma_author":[2607,2985],"class_list":{"0":"post-107638","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-cooling-system","8":"category-diy","9":"tag-coolant-reservoir-hose","10":"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 To Inspect Car Coolant Hoses - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn the best tips on how to inspect your car\u2019s coolant hoses as well as how to spot and fix the common types of hose failure.\" \/>\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-to-inspect-car-coolant-hoses\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How To Inspect Car Coolant Hoses - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn the best tips on how to inspect your car\u2019s coolant hoses as well as how to spot and fix the common types of hose failure.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/how-to-inspect-car-coolant-hoses\/\" \/>\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:author\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2024-06-05T11:11:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-23T06:13:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/06\/car-coolant-hoses-and-components.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=\"author\" content=\"CarParts.com Research Team, Richard McCuistian, ASE Certified Master Automobile Technician\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/CarPartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"CarParts.com Research Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 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-to-inspect-car-coolant-hoses\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/how-to-inspect-car-coolant-hoses\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"1651\",\"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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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. 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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\/107638","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\/1651"}],"replies":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/comments?post=107638"}],"version-history":[{"count":0,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/107638\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media\/107825"}],"wp:attachment":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media?parent=107638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/categories?post=107638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/tags?post=107638"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=107638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}