{"id":121059,"date":"2024-11-06T23:26:17","date_gmt":"2024-11-07T07:26:17","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=121059"},"modified":"2025-02-03T17:08:24","modified_gmt":"2025-02-04T01:08:24","slug":"what-are-boots-for-spark-plugs","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-are-boots-for-spark-plugs\/","title":{"rendered":"What Are Boots for Spark Plugs?"},"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-column121059_cd4eaf-80 > .kt-inside-inner-col,.kadence-column121059_cd4eaf-80 > .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-column121059_cd4eaf-80 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column121059_cd4eaf-80 > .kt-inside-inner-col{flex-direction:column;}.kadence-column121059_cd4eaf-80 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column121059_cd4eaf-80 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column121059_cd4eaf-80{position:relative;}@media all and (max-width: 1024px){.kadence-column121059_cd4eaf-80 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column121059_cd4eaf-80 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column121059_cd4eaf-80 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-591ae7  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-d21cd4\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading121059_6678c1-4b, .wp-block-kadence-advancedheading.kt-adv-heading121059_6678c1-4b[data-kb-block=\"kb-adv-heading121059_6678c1-4b\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading121059_6678c1-4b mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading121059_6678c1-4b[data-kb-block=\"kb-adv-heading121059_6678c1-4b\"] 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-heading121059_6678c1-4b img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading121059_6678c1-4b[data-kb-block=\"kb-adv-heading121059_6678c1-4b\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading121059_6678c1-4b summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading121059_6678c1-4b\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spark plug boots insulate the connection where the ignition cable connects to the spark plug.<\/li>\n\n\n\n<li>Coil-on-plug boots are the modern version of spark plug boots.<\/li>\n\n\n\n<li>Replace the COP coil boots whenever you replace your vehicle&rsquo;s spark plugs, and replace the spark plug wires with some really good ones if you notice the boots are torn, hard, leaking spark, or if you notice carbon tracking on the spark plugs.<\/li>\n\n\n\n<li>When replacing spark plug boots, use the right tools, remove the engine cover to reach them, and pay attention to resistors or connecting springs&rsquo; positions when installing the new boot.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>When you replace your vehicle&rsquo;s <a href=\"https:\/\/www.carparts.com\/spark-plug\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark plugs\">spark plugs<\/a>, do you also need to replace the <a href=\"https:\/\/www.carparts.com\/spark-plug-boot\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark plug boots\">spark plug boots<\/a>, and what do these boots even do?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is a Spark Plug Boot?<\/h2>\n\n\n\n<p>Spark plug boots insulate the coil or spark plug wire connection. They are often made of rubber or silicone, which wears down and breaks over time.<\/p>\n\n\n\n<p>If the voltage arcs due to a bad spark plug boot, the arcing voltage can cause engine misfires because the voltage isn&rsquo;t going to the spark plugs as it should. Rough idling and stalling are also symptoms of a bad spark plug boot. Preventing voltage arcing is the main reason spark plug boots are necessary.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"648\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/misfire-bite-648x1024.jpg\" alt=\"image of a misfire bite\" class=\"wp-image-124520\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/misfire-bite-648x1024.jpg 648w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/misfire-bite-190x300.jpg 190w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/misfire-bite-768x1214.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/misfire-bite-150x237.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/misfire-bite.jpg 949w\" sizes=\"(max-width: 648px) 100vw, 648px\"><figcaption class=\"wp-element-caption\">If you have a misfire &ldquo;bite&rdquo; under load, spray a bit of mildly soapy water on the spark plug boots with the engine running. If you see lightning pop out of the plug boot and a misfire happens at the same instant you see it, that boot is done for (see photo). | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"907\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-well-907x1024.jpg\" alt=\"spark plug well image\" class=\"wp-image-124521\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-well-907x1024.jpg 907w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-well-266x300.jpg 266w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-well-768x867.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-well-150x169.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-well.jpg 1328w\" sizes=\"(max-width: 907px) 100vw, 907px\"><figcaption class=\"wp-element-caption\">If the spark plugs are in wells, you can unseat the wire and hold it up a bit to see if the spark pops out the side of the boot down in the well (see photo). Wear leather gloves while doing this. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>Modern vehicles have coil-on-plug (COP) insulator boots, which are part of COP ignition systems. COP boots are the modern version of spark plug boots. They serve the same purpose, but they&rsquo;re part of a system where the ignition coil is mounted directly to the spark plug. A good spark plug replacement will include replacing the COP coil boots as well.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>If you have a misfire &ldquo;bite&rdquo; under load, spray a bit of mildly soapy water on the spark plug boots with the engine running. If you see lightning pop out of the plug boot and a misfire happens at the same instant you see it, that boot is done for.<\/p>\n<cite><em>&ndash;&nbsp;<\/em><a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">When To Replace Spark Plug Boots<\/h2>\n\n\n\n<p>It&rsquo;s typically a good idea to replace the spark plug boots whenever you replace your vehicle&rsquo;s spark plugs if you have COP coils.<\/p>\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\/dielectric-grease-what-it-is-what-its-for-and-how-to-use-it\/\" target=\"_self\" rel=\"dofollow\" class=\"u7426e37d23e899ee6685a9e99f287bd8\"><style> .u7426e37d23e899ee6685a9e99f287bd8 { 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; } .u7426e37d23e899ee6685a9e99f287bd8:active, .u7426e37d23e899ee6685a9e99f287bd8:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u7426e37d23e899ee6685a9e99f287bd8 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u7426e37d23e899ee6685a9e99f287bd8 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u7426e37d23e899ee6685a9e99f287bd8 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u7426e37d23e899ee6685a9e99f287bd8: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\">Dielectric Grease: What It Is, What It&rsquo;s For, and How to Use It<\/span><\/div><\/a><\/div><\/div>\n\n\n<style>.kadence-column121059_585da3-a4 > .kt-inside-inner-col,.kadence-column121059_585da3-a4 > .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-column121059_585da3-a4 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column121059_585da3-a4 > .kt-inside-inner-col{flex-direction:column;}.kadence-column121059_585da3-a4 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column121059_585da3-a4 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column121059_585da3-a4{position:relative;}@media all and (max-width: 1024px){.kadence-column121059_585da3-a4 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column121059_585da3-a4 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column121059_585da3-a4 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-id121059_34e2ac-a6 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id121059_34e2ac-a6 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id121059_34e2ac-a6 > .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-id121059_34e2ac-a6 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id121059_34e2ac-a6 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id121059_34e2ac-a6 > .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-id121059_34e2ac-a6 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id121059_34e2ac-a6 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id121059_34e2ac-a6 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-column121059_0c1492-b4 > .kt-inside-inner-col{display:flex;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col{min-height:45px;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col,.kadence-column121059_0c1492-b4 > .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-column121059_0c1492-b4 > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col > *, .kadence-column121059_0c1492-b4 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column121059_0c1492-b4 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column121059_0c1492-b4{position:relative;}@media all and (max-width: 1024px){.kadence-column121059_0c1492-b4 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column121059_0c1492-b4 > .kt-inside-inner-col > *, .kadence-column121059_0c1492-b4 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column121059_0c1492-b4 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column121059_0c1492-b4 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col > *, .kadence-column121059_0c1492-b4 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column121059_0c1492-b4 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column121059_0c1492-b4 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column121059_0c1492-b4 kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image121059_ed9b40-30.kb-image-is-ratio-size, .kb-image121059_ed9b40-30 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image121059_ed9b40-30.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image121059_ed9b40-30 .kb-image-is-ratio-size{align-self:unset;}.kb-image121059_ed9b40-30 figure{max-width:45px;}.kb-image121059_ed9b40-30 .image-is-svg, .kb-image121059_ed9b40-30 .image-is-svg img{width:100%;}.kb-image121059_ed9b40-30 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image121059_ed9b40-30\"><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-column121059_c58846-b1 > .kt-inside-inner-col,.kadence-column121059_c58846-b1 > .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-column121059_c58846-b1 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column121059_c58846-b1 > .kt-inside-inner-col{flex-direction:column;}.kadence-column121059_c58846-b1 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column121059_c58846-b1 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column121059_c58846-b1{position:relative;}@media all and (max-width: 1024px){.kadence-column121059_c58846-b1 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column121059_c58846-b1 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column121059_c58846-b1 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            If your vehicle has spark plug wires, the boots will come with new wires. Simply replacing the boot on an existing wire is not recommended, and spark plug wire boots aren&rsquo;t typically available without buying the wires anyway.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"853\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/dielectric-grease-853x1024.jpg\" alt=\"image of a dielectric grease\" class=\"wp-image-124522\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/dielectric-grease-853x1024.jpg 853w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/dielectric-grease-250x300.jpg 250w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/dielectric-grease-768x922.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/dielectric-grease-150x180.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/dielectric-grease.jpg 1249w\" sizes=\"(max-width: 853px) 100vw, 853px\"><figcaption class=\"wp-element-caption\">Whether you replace the spark plugs or not, put a bit of dielectric grease inside the boot to help prevent RFI and to help prevent the boot from vulcanizing itself to the spark plug ceramic, which is very annoying and happens all the time on high mileage vehicles. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"464\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-carbon-tracking-1024x464.jpg\" alt=\"spark plug with carbon trace\" class=\"wp-image-124523\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-carbon-tracking-1024x464.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-carbon-tracking-300x136.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-carbon-tracking-768x348.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-carbon-tracking-150x68.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/11\/spark-plug-carbon-tracking.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Carbon tracking is another common sign that you need to replace a spark plug boot (see photo). | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>If you see a streak of carbon on your spark plug, it&rsquo;s likely from a bad spark plug boot. If you <a href=\"https:\/\/www.carparts.com\/blog\/how-to-change-spark-plugs\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"replace the spark plug\">replace the spark plug<\/a> but not the boot, the boot can cause more carbon tracking on the new spark plug.<\/p>\n\n\n\n<p>Oil-soaked boots also need to be replaced, but you&rsquo;ll need to locate and eliminate the oil leak source as well.<\/p>\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Tips for How To Change Spark Plug Boots<\/h2>\n\n\n\n<p>Replacing COP boots can be pretty simple, but a lot depends on your vehicle&rsquo;s exact year, make, and model. We&rsquo;ve compiled some good tips for changing spark plug boots on a COP system, but keep in mind that these tips might not be applicable for every vehicle.<\/p>\n\n\n\n<p>To prevent bad burns, remember to wait for the engine to cool down completely and disconnect the battery before starting this project.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Recommended Tools<\/h3>\n\n\n\n<p>You&rsquo;ll need a screwdriver or wrench to remove the coils or coil block when working with COP boots. If you also plan to replace the spark plugs, you&rsquo;ll need a plug wrench and gapping tool. If you can, pick up a set of spark plug wire boot pliers as well.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Reaching the Boots<\/h3>\n\n\n\n<p>Before you examine the spark plug boots, you&rsquo;ll need to reach them. Remove the engine cover to reach the spark plugs and coils. In a COP system, the boot is integrated into the spark plug and ignition coil design. You can remove the whole thing from the spark plug well and inspect it for damage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Spark Plug Boot Removal and Replacement<\/h3>\n\n\n\n<p>Once you&rsquo;ve removed the COP unit from the spark plug well, place it on a flat surface before twisting the boot off the coil. Examine the boot and the coils for any damage. Check the coils and take note of any resistors or connecting springs. Their position and orientation will need to align again when you install a new spark plug boot.<\/p>\n\n\n\n<p>Compare the new spark plug boot with the old one, and check to make sure the designs match. Slight variations should be ok, but don&rsquo;t proceed if there are major differences. Reassemble everything, making sure all the resistors and connecting springs are in the correct position. Lubricate the boot on the spark plug end using a bit of dielectric grease before reinstalling it. <a href=\"https:\/\/www.carparts.com\/blog\/how-tight-should-spark-plugs-be-see-torque-chart\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Avoid over tightening\">Avoid over tightening<\/a> any fasteners in the system when reassembling everything.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Additional Steps<\/h3>\n\n\n\n<p>If your COP unit has a gasket, you might want to replace it as well. It&rsquo;s only a matter of sliding it off the coil and sliding a new one on. While the COP unit is disassembled, you might also want to check the ignition coils and spark plugs for damage.<\/p>\n\n\n\n<p>Boots for spark plugs are essential for keeping your vehicle&rsquo;s spark plugs firing correctly. Whenever you change your spark plugs, you can also change the spark plug boots. It doesn&rsquo;t take much extra effort, and doing so will help your brand new spark plug last as long as possible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get Spark Plug Boots Parts for Your Car<\/h2>\n\n\n\n<p>To get the most out of your <a href=\"https:\/\/www.carparts.com\/spark-plug-boot\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark plug boot\">spark plug boot<\/a>, you&rsquo;ll need a high-quality replacement. Thankfully, <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a> has an array of products from different brands at different price points for you to choose from.<\/p>\n\n\n\n<p>One thing we can guarantee is the speed and efficiency with which we deliver orders. All our spark plug boots are on hand and ready to ship from a warehouse near you, so you can expect your order in as fast as two business days.<\/p>\n\n\n\n<p>You also don&rsquo;t need to go over budget to get top-notch spark plug boots. We offer them at competitive prices to give you the best value for your money.<\/p>\n\n\n\n<p>Check out our catalog, and order your spark plug boots now!<\/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>When you replace your vehicle&rsquo;s spark plugs, do you also need to replace the spark plug boots, and what do&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-are-boots-for-spark-plugs\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":121373,"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":[3767],"tags":[3260],"ppma_author":[2607,2985],"class_list":{"0":"post-121059","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-driving","8":"tag-spark-plug-boot","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Are Boots for Spark Plugs? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Spark plug boots are responsible for keeping voltage from the ignition from arcing through the engine. 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