{"id":17063,"date":"2026-07-10T20:50:55","date_gmt":"2026-07-10T20:50:55","guid":{"rendered":"https:\/\/sellatease.com\/public-blog\/?p=17063"},"modified":"2026-07-13T09:09:19","modified_gmt":"2026-07-13T09:09:19","slug":"car-oil-pump-working-principle-function-symptoms-and-maintenance","status":"publish","type":"post","link":"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/","title":{"rendered":"Car oil pump: working principle, function, symptoms, and maintenance"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">An oil pump is the heart of your engine\u2019s lubrication system. Without it, there will be no lubrication of the moving parts, resulting in excessive wear and overheating. If not fixed on time, a total engine breakdown will occur. Often, the oil pump is overlooked during maintenance. A healthy oil pump is very important, and it extends the lifespan of your engine as well as saves you money. In this article, we will be covering everything about the car oil pump, including its working principle and common signs of failure.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a7819c66b309\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a7819c66b309\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#What_is_a_car_oil_pump\" >What is a car oil pump?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Working_principle_of_the_oil_pump\" >Working principle of the oil pump<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Functions_of_an_engine_oil_pump\" >Functions of an engine oil pump<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Common_types_of_car_oil_pumps\" >Common types of car oil pumps<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Gear_oil_pump\" >Gear oil pump<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Rotor_oil_pump\" >Rotor oil pump<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Vane_oil_pump\" >Vane oil pump<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Symptoms_of_a_bad_oil_pump\" >Symptoms of a bad oil pump<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Common_causes_of_oil_pump_failure\" >Common causes of oil pump failure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/#Summary\" >Summary<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"What_is_a_car_oil_pump\"><\/span><strong>What is a car oil pump?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/sellatease.com\/public-blog\/category\/cars\/\">car<\/a> oil pump is a mechanical device that circulates engine oil throughout the engine. The device draws oil from the sump, sends it to the oil filter before distributing it to the moving engine components. Without it, moving parts like the crankshaft, camshafts, pistons, bearings, and valve trains won\u2019t function properly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It ensures that every moving part receives adequate lubrication to reduce friction, reduce wear, and regulate engine temperature for maximum performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Working_principle_of_the_oil_pump\"><\/span><strong>Working principle of the oil pump<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Its major function is making sure every moving part is lubricated properly at all times. It&#8217;s usually driven by the crankshaft, timing chain, or timing belt. The pump rotates as the engine is running, creates suction that pulls oil from the pan through the pick tube, pressurizes it, and sends it to the oil filter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Contaminants such as debris are removed by the oil filter before the clean oil reaches the engine\u2019s internal components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After lubrication, the oil drains back into the oil pan, and the cycle repeats continuously while the engine is running.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Functions_of_an_engine_oil_pump\"><\/span><strong>Functions of an engine oil pump<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The oil pump performs a variety of critical functions, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Circulates engine oil throughout the engine<\/li>\n\n\n\n<li>Lubricates the moving parts to reduce friction<\/li>\n\n\n\n<li>Cools down the engine by carrying away heat as the oil flows<\/li>\n\n\n\n<li>Maintains required oil pressure<\/li>\n\n\n\n<li>Improves engine longevity and performance<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Common_types_of_car_oil_pumps\"><\/span><strong>Common types of car oil pumps<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There are three main types of car oil pumps, they include:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Gear Oil Pump<\/li>\n\n\n\n<li>Rotor (Gerotor) oil pump<\/li>\n\n\n\n<li>Vane Oil Pump<\/li>\n<\/ol>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"560\" height=\"330\" src=\"https:\/\/sellatease.com\/public-blog\/wp-content\/uploads\/2026\/07\/engine-oil-pump1-560x330-1.jpg\" alt=\"Common types of car oil pumps\" class=\"wp-image-17065\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Gear_oil_pump\"><\/span><strong>Gear oil pump<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This particular type of oil pump is the most common type, mostly found in passenger vehicles. It utilizes two interlocking gears to create oil pressure and deliver oil throughout the engine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Rotor_oil_pump\"><\/span><strong>Rotor oil pump<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This type makes use of an inner and outer rotor to move oil efficiently. It&#8217;s known for its reliability, mostly found in modern vehicles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Vane_oil_pump\"><\/span><strong>Vane oil pump<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Just as the name implies, this type uses a vane to move oil. It&#8217;s not too popular in new passenger cars.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Symptoms_of_a_bad_oil_pump\"><\/span><strong>Symptoms of a bad oil pump<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A bad oil pump can lead to serious engine damage if not replaced on time with an original one.&nbsp; Always be on the lookout for these warning signs to avoid engine replacement.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Low oil pressure warning light:<\/strong> Once there is a drop in oil pressure, the light will come on on your dashboard. It&#8217;s advisable to find a safe location and park. Then call your mechanic to fix it to avoid catastrophic engine failure. You can also browse the web for <strong>oil pumps for sale<\/strong> around you.<\/li>\n\n\n\n<li><strong>Unusual engine noise:<\/strong> When there is low or insufficient lubrication on the engine, it will lead to knocking, ticking, or grinding noises due to increased friction between engine components.<\/li>\n\n\n\n<li><strong>Overheating:<\/strong> once there is insufficient lubrication, friction between engine parts will increase, thereby leading to excessive heat generation.<\/li>\n\n\n\n<li><strong>Hydraulic lifter noise:<\/strong> Poor oil circulation will always cause the lifters to make ticking or tapping sounds.<\/li>\n\n\n\n<li><strong>Reduced engine performance:<\/strong> reduced lubrication leads to increased friction, making the engine less efficient.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Common_causes_of_oil_pump_failure\"><\/span><strong>Common causes of oil pump failure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Several factors can lead to oil pump failure or damage it completely. They include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dirty engine oil<\/li>\n\n\n\n<li>Low engine oil level<\/li>\n\n\n\n<li>Worn internal pump gears<\/li>\n\n\n\n<li>Clogged oil pickup screen<\/li>\n\n\n\n<li>Poor maintenance<\/li>\n\n\n\n<li>Using the wrong engine oil<\/li>\n\n\n\n<li>Poor maintenance<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Summary\"><\/span><strong>Summary<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In conclusion, driving with a faulty oil pump is extremely risky; the engine might be destroyed within minutes. If your oil pressure light comes on and stays on, stop driving immediately and carry out a thorough inspection of your vehicle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Failure to do so, you might be buying a new engine, and that will set you back by a couple of Dollars.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An oil pump is the heart of your engine\u2019s lubrication system. Without it, there will be no lubrication of the moving parts, resulting in excessive wear and overheating. If not fixed on time, a total engine breakdown will occur. Often, the oil pump is overlooked during maintenance. A healthy oil pump is very important, and &hellip;<\/p>\n","protected":false},"author":1,"featured_media":17066,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[351],"class_list":["post-17063","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cars","tag-cars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Car oil pump: working principle, function, symptoms, and maintenance &#8902; Sellatease Blog<\/title>\n<meta name=\"description\" content=\"In this article, we will be covering everything about the car oil pump, including its working principle and common signs of 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:\/\/sellatease.com\/public-blog\/car-oil-pump-working-principle-function-symptoms-and-maintenance\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Car oil pump: working principle, function, symptoms, and maintenance &#8902; 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