{"id":184997,"date":"2025-10-28T21:03:04","date_gmt":"2025-10-29T04:03:04","guid":{"rendered":"https:\/\/www.carparts.com\/blog\/?p=184997"},"modified":"2025-10-28T21:03:10","modified_gmt":"2025-10-29T04:03:10","slug":"where-is-the-antifreeze-located","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/where-is-the-antifreeze-located\/","title":{"rendered":"Where is the Antifreeze Located?"},"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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<div class=\"summary-widget\">\n    <h3>Summary<\/h3>\n    <ul class=\"summary-grid\">\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        Antifreeze is kept in the coolant reservoir near the radiator. It&rsquo;s usually mixed with water to create engine coolant.                    <\/p>\n                \n            <\/div>\n        <\/li>\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        It helps control engine temperature by lowering the freezing point and raising the boiling point of the liquid. Corrosion inhibitors keep the coolant alkaline and protect metal parts from rust and deposits.                    <\/p>\n                \n            <\/div>\n        <\/li>\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        Only check or add coolant when the engine is cool. Radiator-cap systems can appear full even when the radiator is low, while capless systems rely on the surge tank. Fully drained systems must be bled of air as the engine warms, though surge-tank-only designs usually release trapped air automatically.                    <\/p>\n                \n            <\/div>\n        <\/li>\n        <\/ul>\n<\/div>\n\n\n\n\n\n<p><strong><a href=\"https:\/\/www.carparts.com\/coolant-antifreeze\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Antifreeze\">Antifreeze<\/a> is stored in the <a href=\"https:\/\/www.carparts.com\/coolant-reservoir\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"coolant reservoir\">coolant reservoir<\/a> near the <a href=\"https:\/\/www.carparts.com\/radiator\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"radiator\">radiator<\/a>. It&rsquo;s usually mixed with water in the container, creating what&rsquo;s commonly known as engine <a href=\"https:\/\/www.carparts.com\/blog\/is-coolant-the-same-as-antifreeze-plus-other-related-questions-answered\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"coolant\">coolant<\/a>.<\/strong><\/p>\n\n\n\n<p>Antifreeze is more commonly called &ldquo;coolant&rdquo; by professionals. This is a <a href=\"https:\/\/www.carparts.com\/blog\/what-kinds-of-antifreeze-and-coolant-are-there\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"glycol-based fluid\">glycol-based fluid<\/a> that helps regulate the engine&rsquo;s temperature. When combined with water, it lowers the liquid&rsquo;s freezing point, enabling coolant to keep flowing at extremely low temperatures instead of turning into solid ice.&nbsp;<\/p>\n\n\n\n<p>Furthermore, antifreeze raises the water&rsquo;s boiling point, keeping the liquid from evaporating into steam at very high temperatures.<\/p>\n\n\n\n<p>Antifreeze also helps prevent corrosion. It contains additives called corrosion inhibitors that stops rust and other corrosive deposits from forming in the engine. These inhibitors maintain the coolant&rsquo;s alkaline pH, preventing acidity that can corrode metal.<\/p>\n\n\n\n<p><strong><em>Warning:<\/em><\/strong><em> To prevent serious burns, never open a hot cooling system under any circumstances. Always feel the <a href=\"https:\/\/www.carparts.com\/radiator-hose\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"radiator hose\">radiator hose<\/a> to see if it has pressure. It&rsquo;s best to let the engine cool for at least 30 minutes, then check for system pressure by feeling the hose.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tips on How to Access the Antifreeze<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"575\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/open-radiator-filler-neck-with-green-antifreeze-1024x575.jpg\" alt=\"open radiator filler neck with green antifreeze\" class=\"wp-image-184998\"><figcaption class=\"wp-element-caption\">Some systems have no cap on the radiator, but if they do, you can let the engine cool and remove the <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-radiator-cap-functions-symptoms-replacement-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"cap\">cap<\/a> to check the coolant level (see photo). | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>Systems with a thin de-gas bottle may have coolant in the reservoir but have very little coolant in the radiator itself, so you can&rsquo;t just look at the coolant level in that plastic reservoir to determine coolant level on a system with a cap on the radiator.<\/p>\n\n\n\n<p>If yours doesn&rsquo;t have a radiator cap, then looking at the coolant level in the heavy surge tank is the only choice you have, and that&rsquo;s where you&rsquo;ll add all the coolant to the system.<\/p>\n\n\n\n<p>On systems with a radiator cap and surge tank, you need to understand that if all the coolant has been drained from the system, refilling the engine with coolant isn&rsquo;t like pouring water in a bucket. Air will be trapped in the system and it needs to be systematically allowed to escape as the <a href=\"https:\/\/www.carparts.com\/thermostat\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"thermostat\">thermostat<\/a> opens when the engine warms up.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"431\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/coolant-reservoir-surge-degass-tank-1024x431.jpg\" alt=\"coolant reservoir surge degass tank\" class=\"wp-image-184999\"><figcaption class=\"wp-element-caption\">The ones with the only fill point being on the surge tank (see photo) are slightly different in that they tend to burp air out automatically, but make sure the system is full before you close the hood and call it done. | Image Source: Richard McCuistian<\/figcaption><\/figure>\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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Antifreeze is stored in the coolant reservoir near the radiator. It&rsquo;s usually mixed with water in the container, creating what&rsquo;s&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/where-is-the-antifreeze-located\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":184998,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[1034,3753,52],"tags":[1669,1247],"ppma_author":[2607,2985],"class_list":{"0":"post-184997","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-auto-repair","8":"category-cooling-system","9":"category-diy","10":"tag-coolant-antifreeze-2","11":"tag-coolant-reservoir","12":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Where is the Antifreeze Located? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Knowing where the antifreeze is kept in your car will help you replenish this fluid. 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