{"id":122269,"date":"2024-11-13T14:48:58","date_gmt":"2024-11-13T22:48:58","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=122269"},"modified":"2025-02-06T07:16:00","modified_gmt":"2025-02-06T15:16:00","slug":"how-to-compress-a-brake-caliper","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/how-to-compress-a-brake-caliper\/","title":{"rendered":"How to Compress a Brake Caliper"},"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-column122269_f5c044-86 > .kt-inside-inner-col,.kadence-column122269_f5c044-86 > .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-column122269_f5c044-86 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column122269_f5c044-86 > .kt-inside-inner-col{flex-direction:column;}.kadence-column122269_f5c044-86 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column122269_f5c044-86 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column122269_f5c044-86{position:relative;}@media all and (max-width: 1024px){.kadence-column122269_f5c044-86 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column122269_f5c044-86 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column122269_f5c044-86 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-98ae22  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-a85496\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading122269_8d8cef-2f, .wp-block-kadence-advancedheading.kt-adv-heading122269_8d8cef-2f[data-kb-block=\"kb-adv-heading122269_8d8cef-2f\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading122269_8d8cef-2f mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading122269_8d8cef-2f[data-kb-block=\"kb-adv-heading122269_8d8cef-2f\"] 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-heading122269_8d8cef-2f img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading122269_8d8cef-2f[data-kb-block=\"kb-adv-heading122269_8d8cef-2f\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading122269_8d8cef-2f summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading122269_8d8cef-2f\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Corrosion is the main reason why a brake caliper could get stuck.<\/li>\n\n\n\n<li>There are different ways to compress a brake caliper, depending on whether it&rsquo;s a front or rear caliper.<\/li>\n\n\n\n<li>Brake caliper pistons can be compressed in several ways. While using compression tools like a C-clamp or channel lock is the easiest way to do the job, you can get around the task without it.<\/li>\n\n\n\n<li>An old brake pad or a screwdriver can also be used to compress a brake caliper.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Compressing a brake caliper is always necessary when replacing the disc pads, because as the pads wear, the piston extends. It&rsquo;s an automatic self-adjusting system by default.<\/p>\n\n\n\n<p>If when you&rsquo;re replacing the brakes you find that one caliper won&rsquo;t compress (this doesn&rsquo;t usually happen to both of the calipers at once), you need to replace the caliper anyway. Note that rear brake calipers that have integrated park brakes take special tools. We&rsquo;ll talk more about that later.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Main Reason Why Your Brake Caliper Might Stick or Won&rsquo;t Compress<\/h2>\n\n\n\n<p>Dealing with a <a href=\"https:\/\/www.carparts.com\/brake-caliper\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"brake caliper\">brake caliper<\/a> that won&rsquo;t compress can be quite troublesome. It&rsquo;s the one thing that drivers hope will never happen to them, especially when driving fast on a freeway.<\/p>\n\n\n\n<p>So why does this happen?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Corrosion<\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"924\" height=\"768\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/brake-caliper-fail-to-compress-because-of-corrosion.jpg\" alt=\"brake caliper fail to compress because of corrosion\" class=\"wp-image-124961\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/brake-caliper-fail-to-compress-because-of-corrosion.jpg 924w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/brake-caliper-fail-to-compress-because-of-corrosion-300x249.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/brake-caliper-fail-to-compress-because-of-corrosion-768x638.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/brake-caliper-fail-to-compress-because-of-corrosion-150x125.jpg 150w\" sizes=\"(max-width: 924px) 100vw, 924px\"><figcaption class=\"wp-element-caption\">Corrosion is the most probable reason why a brake caliper will fail to compress (see photo). This happens when there is a lot of moisture in the fluid or when the caliper&rsquo;s protective boot has been compromised. Some brake caliper pistons are made out of metal, which can accumulate rust over time. Others are made of composite material, which may swell enough to cause them to stick. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Compress a Front Brake Caliper (With and Without Piston Tools)<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/brake-caliper-piston\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Brake caliper pistons\">Brake caliper pistons<\/a> can be compressed in several ways. While using compression tools like a C-clamp or channel lock is the easiest way to do the job, you can get around the task without it.<\/p>\n\n\n\n<p>Before anything else, make sure that you&rsquo;re wearing <a href=\"https:\/\/www.carparts.com\/gloves\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"gloves\">gloves<\/a> and other safety equipment to prevent any injuries.<\/p>\n\n\n\n<p>Proceed with loosening the wheel bolts or nuts and raising the vehicle using <a href=\"https:\/\/www.carparts.com\/jack-stand\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"jack stands\">jack stands<\/a>.<\/p>\n\n\n\n<p>Next, remove the wheel and unbolt the caliper. Make sure the caliper isn&rsquo;t hanging freely to avoid damaging the brake lines. Use wire ties or wire to support the weight of the caliper.<\/p>\n\n\n\n<p>Once that&rsquo;s out of the way, you can open the cap on the brake fluid reservoir.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"558\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/caliper-retraction-tool.jpg\" alt=\"caliper retraction tool\" class=\"wp-image-124962\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/caliper-retraction-tool.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/caliper-retraction-tool-300x279.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/caliper-retraction-tool-150x140.jpg 150w\" sizes=\"(max-width: 600px) 100vw, 600px\"><figcaption class=\"wp-element-caption\">Use a caliper retraction tool (there are several types; one shown in the photo) or a C-clamp to compress the caliper. If you haven&rsquo;t drawn some fluid out of the master cylinder, it will overflow as you compress the piston and you&rsquo;ll see fluid dripping. It doesn&rsquo;t hurt anything but makes a mess. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Alternative Way to Compress a Front Brake Caliper<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Using an Old Brake Pad Next to the Piston<\/h4>\n\n\n\n<p>Use one of your old brake pads between the tool tip and the pistons since some calipers have dual pistons. This will enable the tool to press the pistons back into the caliper evenly.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Using a Large Screwdriver<\/h4>\n\n\n\n<p>Use a large flathead <a href=\"https:\/\/www.carparts.com\/screwdriver\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"screwdriver\">screwdriver<\/a> or a pry bar and before you unbolt the caliper, slowly apply force between the pad and the rotor (you&rsquo;ll need start at the edge where the pad ears are) and hold steady pressure so that the caliper piston retracts. If you are able to fully compress the piston this way, you probably won&rsquo;t need to use the tool, but have one ready anyway or a C-clamp.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Compress a Rear Brake Caliper Using the Special Tool<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"445\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/rear-caliper-tool-and-caliper-integrated-park-brake-1024x445.jpg\" alt=\"rear caliper tool and caliper integrated park brake\" class=\"wp-image-124963\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/rear-caliper-tool-and-caliper-integrated-park-brake-1024x445.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/rear-caliper-tool-and-caliper-integrated-park-brake-300x131.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/rear-caliper-tool-and-caliper-integrated-park-brake-768x334.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/rear-caliper-tool-and-caliper-integrated-park-brake-1536x668.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/rear-caliper-tool-and-caliper-integrated-park-brake-150x65.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/rear-caliper-tool-and-caliper-integrated-park-brake.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">When the rear calipers include the park brakes, the piston must be screwed in rather than pressed in and a special tool is required. You cannot do this job without the special tool. It takes practice and patience to use this tool. Read the instructions carefully. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p><strong>Note:<\/strong> Most rear parking brakes now are either electric or have a small set of brake shoes that work inside a &ldquo;hat&rdquo; type disc rotor, so this tool won&rsquo;t be used on those.<\/p>\n\n\n\n<p>When using a brake caliper wind back tool on an integrated park brake caliper, choose a circular plate that interfaces with the caliper&rsquo;s piston grooves. Read the instructions that come with the tool to learn how to use it properly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Brake Caliper Designs<\/h2>\n\n\n\n<p>There are generally three types of brake caliper designs&#19968;fixed, floating, and sliding.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fixed Brake Caliper<\/h3>\n\n\n\n<p>A fixed brake caliper is mounted to the suspension, hence its name. This type uses two, four, or six pistons to apply the brake pads.<\/p>\n\n\n\n<p>One advantage a fixed brake caliper has over other designs is its size and weight. A large and heavy caliper like this is great at absorbing and dissipating great amounts of heat and lets the rotor and pads run cooler.<\/p>\n\n\n\n<p>However, a fixed brake caliper has multiple pistons and split bodies, which means servicing one can be quite complicated.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Floating Brake Caliper<\/h3>\n\n\n\n<p>A floating caliper design isn&rsquo;t mounted to the suspension. For this design, the caliper can move within a limited range on an anchor plate that&rsquo;s mounted to the suspension.<\/p>\n\n\n\n<p>Compared to a fixed caliper, a floating brake caliper has a simpler construction, lower cost, and compact size. However, the flexibility of a floating caliper can contribute to a spongy brake pedal.<\/p>\n\n\n\n<p>The flex also causes the caliper body to twist slightly when the brakes are applied, resulting in tapered wear of the brake pad lining material.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Sliding Brake Caliper<\/h3>\n\n\n\n<p>The body of a sliding brake caliper is directly mounted to the anchor plate. Instead of using pins and bushings, a sliding caliper moves on ways cast and is machined into the caliper and anchor plate.<\/p>\n\n\n\n<p>A sliding caliper has the same advantages and disadvantages as a floating caliper.<\/p>\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Brake Caliper Maintenance<\/h2>\n\n\n\n<p>Maintaining and cleaning your brake calipers are key if you want to reduce the risk of your caliper pistons getting stuck.<\/p>\n\n\n\n<p>Cleaning the brake caliper can also extend its lifespan and maximize your vehicle&rsquo;s braking efficiency.<\/p>\n\n\n\n<p>When cleaning your brake calipers, make sure to use a cleaner that&rsquo;s intended for brake parts. This will help break down the dust and grime without damaging the hardware.<\/p>\n\n\n\n<p>Once you&rsquo;re done cleaning and wiping the brake caliper dry, it&rsquo;s also a good idea to apply a protective coating or caliper paint. This enhances the caliper&rsquo;s appearance and forms a layer that protects it from dirt and grime.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Enjoy Fast Delivery of Your New Brake Caliper Piston<\/h2>\n\n\n\n<p>It&rsquo;s best to leave your vehicle in the garage until you&rsquo;ve installed new brake caliper pistons. Otherwise, you might aggravate the problem or create new issues, increasing the repair cost. Fortunately, CarParts.com delivers replacement brake caliper pistons to your doorstep, removing the need to drive your car to get new parts.<\/p>\n\n\n\n<p><a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a> operates distribution centers in key locations throughout the US. The nearest center will process your order for a new brake caliper piston and ship on-hand products quickly. If you live in the continental US and order before noon ET, your new part will arrive in several business days. We also streamlined the process of searching for the right brake caliper piston in our catalog. Plug your vehicle&rsquo;s year, make, model, and engine into our website&rsquo;s vehicle selector. It will bring up the most suitable products, exclusively sourced from veterans of the automotive parts industry.<\/p>\n\n\n\n<p>Enjoy affordable brake caliper pistons at CarParts.com. Order a new <a href=\"https:\/\/www.carparts.com\/brake-caliper-piston\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"brake caliper piston\">brake caliper piston<\/a> today and enjoy big savings on high-quality brake parts.<\/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>Compressing a brake caliper is always necessary when replacing the disc pads, because as the pads wear, the piston extends&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/how-to-compress-a-brake-caliper\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":122272,"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":[3749,52],"tags":[841],"ppma_author":[2607,2985],"class_list":{"0":"post-122269","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-braking-system","8":"category-diy","9":"tag-brake-caliper","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Compress a Brake Caliper - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"A brake caliper that won\u2019t compress can be troublesome. Read on to learn all about the different ways to compress a brake caliper.\" \/>\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-compress-a-brake-caliper\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Compress a Brake Caliper - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"A brake caliper that won\u2019t compress can be troublesome. Read on to learn all about the different ways to compress a brake caliper.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/how-to-compress-a-brake-caliper\/\" \/>\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:published_time\" content=\"2024-11-13T22:48:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-02-06T15:16:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/how-to-compress-a-brake-caliper.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1333\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 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-compress-a-brake-caliper\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/how-to-compress-a-brake-caliper\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"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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