{"id":1439,"date":"2017-07-26T00:00:00","date_gmt":"2017-07-25T23:00:00","guid":{"rendered":"https:\/\/www.stoneacre.co.uk\/blog\/2017\/07\/26\/holy-smoke-what-does-your-exhaust-smoke-mean\/"},"modified":"2025-01-16T15:14:28","modified_gmt":"2025-01-16T15:14:28","slug":"holy-smoke-what-does-your-exhaust-smoke-mean","status":"publish","type":"post","link":"https:\/\/www.stoneacre.co.uk\/blog\/holy-smoke-what-does-your-exhaust-smoke-mean","title":{"rendered":"Holy smoke! What does your exhaust smoke mean?"},"content":{"rendered":"\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img decoding=\"async\" src=\"https:\/\/www.stoneacre.co.uk\/blog\/wp-content\/uploads\/2023\/03\/exhaust.jpg\" alt=\"exhaust smoke\" class=\"wp-image-13129 size-full\"\/><\/figure><div class=\"wp-block-media-text__content\">\n<p>So, you\u2019re driving along and suddenly you notice smoke coming out of your exhaust.<\/p>\n\n\n\n<p>Not what you want to see, right? <\/p>\n\n\n\n<p>You\u2019re probably thinking of a trip to your nearest garage and costly <u><strong><a href=\"https:\/\/www.stoneacre.co.uk\/body-repair-shop\">car repairs<\/a><\/strong><\/u>, but that\u2019s not necessarily the case. <\/p>\n\n\n\n<p>We\u2019ve all been there and it\u2019s a worry, especially if you\u2019ve kept your <u><strong><a aria-label=\" (opens in a new tab)\" href=\"https:\/\/www.stoneacre.co.uk\/car-service\" target=\"_blank\" rel=\"noreferrer noopener\">car regularly serviced<\/a><\/strong><\/u>.<\/p>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><span style=\"text-decoration: underline;\">But what does it mean?<\/span><\/strong><\/h2>\n\n\n\n<p>Smoke coming from your exhaust can mean that something isn\u2019t working properly, or that there\u2019s some damage to your car\u2019s engine or exhaust system. <\/p>\n\n\n\n<p>The colour of the smoke can give you some idea of what could be wrong. <\/p>\n\n\n\n<p>So, what does the colour of the smoke mean? <\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\" style=\"padding-top:10px;padding-bottom:10px\">\n<div class=\"wp-block-button aligncenter has-icon__arrow-right\"><a class=\"wp-block-button__link has-base-color has-green-1-background-color has-text-color has-background has-link-color no-border-radius wp-element-button\" href=\"https:\/\/www.stoneacre.co.uk\/car-service\">Book a service<span class=\"wp-block-button__link-icon\" aria-hidden=\"true\"><svg viewBox='0 0 16 11' xmlns='http:\/\/www.w3.org\/2000\/svg'><polygon points='0 4.7 13.1180124 4.7 9.44099379 1 10.4347826 0 16 5.5 10.4347826 11 9.44099379 10 13.1180124 6.3 0 6.3'><\/polygon><\/svg><\/span><\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><span style=\"text-decoration: underline\">White smoke from your exhaust <\/span><\/strong><\/h2>\n\n\n\n<p>If you\u2019re seeing white exhaust smoke, it could mean two things, depending on how thick it is. <\/p>\n\n\n\n<p>If the smoke is thin, it\u2019s most likely to be steam rather than actual smoke and is caused by condensation in the exhaust system. <\/p>\n\n\n\n<p>When you start your car, the warming engine turns the condensation into steam and the white smoke you see should disappear. <\/p>\n\n\n\n<p>Nothing to worry about.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.stoneacre.co.uk\/blog\/wp-content\/uploads\/2019\/11\/car-with-white-smoke.jpeg\" alt=\"exhaust smoke\" class=\"wp-image-2279\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>But what if the white smoke is thick?  <\/strong> <\/h3>\n\n\n\n<p>Thick white smoke from your exhaust could be a sign of coolant in your car\u2019s combustion chamber. This could be caused by a cracked cylinder head, a blown gasket, or it may just be a cracked seal. <\/p>\n\n\n\n<p> <u><strong><a href=\"https:\/\/www.stoneacre.co.uk\/car-service\/service-treatments\/coolant-change\">Check your coolant level<\/a><\/strong><\/u> \u2013 is it low? If so, you probably have a leak. <\/p>\n\n\n\n<p> You should have your car checked immediately at your nearest garage to have this problem fixed. <\/p>\n\n\n\n<p> <strong>But you\u2019re seeing black smoke, surely that can\u2019t be good?  <\/strong> <\/p>\n\n\n\n<p> Possibly not, but it\u2019s often a simple fix\u2026 <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><span style=\"text-decoration: underline\">Black smoke from your exhaust <\/span><\/strong><\/h2>\n\n\n\n<p>Nobody wants to see black smoke billowing from their exhaust. It can be shocking to see and surely the sign that something catastrophic has happened to your car. <\/p>\n\n\n\n<p>Hold that thought. <\/p>\n\n\n\n<p>Black exhaust smoke simply means that your engine is burning too much fuel. <\/p>\n\n\n\n<p>Engines need both fuel to burn and oxygen to burn it with. If there\u2019s too much fuel in the combustion chamber and not enough oxygen to burn it with, it can cause black smoke to come from your exhaust. <\/p>\n\n\n\n<p>If you see black smoke, it could be a sign of a problem with your air filter, fuel injector or EGR valve if you drive a diesel. <\/p>\n\n\n\n<p>These can be quick, inexpensive fixes, but you should have this checked at <u><strong><a href=\"https:\/\/www.stoneacre.co.uk\/dealerships\">your local garage<\/a><\/strong><\/u>. <\/p>\n\n\n\n<p>All good so far, not too much to worry about. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><span style=\"text-decoration: underline\">Blue smoke from your exhaust <\/span><\/strong><\/h2>\n\n\n\n<p>If you\u2019re seeing blue smoke coming from your exhaust, it is likely to be caused by oil leaking into the combustion chamber and being burned with the fuel. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Surely that\u2019s bad, right?  <\/strong> <\/h3>\n\n\n\n<p>Not necessarily. <\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.stoneacre.co.uk\/blog\/wp-content\/uploads\/2019\/11\/car-with-smoke.jpeg\" alt=\"exhaust smoke\" class=\"wp-image-2280\"\/><\/figure>\n\n\n\n<p>If your car is old or has covered a large number of miles, it\u2019s fairly common for engine seals to wear and allow oil to leak into the combustion chamber. <\/p>\n\n\n\n<p>Sounds expensive to fix. <\/p>\n\n\n\n<p>Not in all cases. <\/p>\n\n\n\n<p>If your car is old you can manage this problem by regularly checking your oil level and topping up when it gets a little low. <\/p>\n\n\n\n<p>If you\u2019re having regular issues with your oil, or your cover a large number of miles, book an <a href=\"https:\/\/www.stoneacre.co.uk\/car-service\"><u><strong>interim service<\/strong><\/u><\/a> at one of our nationwide garages. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>But what if your car is new?<\/strong><\/h3>\n\n\n\n<p>If you\u2019re seeing blue smoke coming from your engine and your car is fairly new, you\u2019re going to want to have this checked by your local garage. <\/p>\n\n\n\n<p>It could be a sign of a more serious issue that, if left, could result in an expensive repair bill. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What sort of serious issues?<\/strong><\/h3>\n\n\n\n<p>Burning oil can cause damage to spark plugs. If left, the spark plugs could fail entirely causing poor fuel economy, engine misfires and difficulty starting your car. <\/p>\n\n\n\n<p>Allowing fuel to mix with the oil in your engine\u2019s crankcase can reduce the efficiency of the oil in protecting your car\u2019s engine. This can cause serious issues, possibly leading to expensive engine repair. <\/p>\n\n\n\n<p>Finally, blue smoke can be a sign that your turbocharger isn\u2019t working correctly. If you\u2019ve noticed a loss of power, it\u2019s possible that oil is getting into the intake. <\/p>\n\n\n\n<p>In these cases, you should have a mechanic look at your car for you. <\/p>\n\n\n\n<p>A final note. <\/p>\n\n\n\n<p>If you think you can see grey smoke coming from your exhaust, treat it in the same way as blue smoke. It\u2019s probably caused by your car burning oil or a problem with your turbo (if you have one). <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"text-decoration: underline\"><strong>So what should you do?  <\/strong> <\/span><\/h2>\n\n\n\n<p>It\u2019s simple. <\/p>\n\n\n\n<p>Most of these issues can be fixed by taking your car to be checked at your local garage. Generally, they are simple fixes that a qualified technician will be able to diagnose and repair without much fuss. <\/p>\n\n\n\n<p>What you shouldn\u2019t do is ignore the signs. Even if you don\u2019t have any <u><strong><a href=\"https:\/\/www.stoneacre.co.uk\/blog\/dashboard-warning-lights\">warning lights on your dashboard<\/a><\/strong><\/u>, smoke coming from your exhaust is a sign that something isn\u2019t right. <\/p>\n\n\n\n<p>Be smart, get it checked. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>So, you\u2019re driving along and suddenly you notice smoke coming out of your exhaust. Not what you want to see, right? You\u2019re probably thinking of a trip to your nearest garage and costly car repairs, but that\u2019s not necessarily the case. We\u2019ve all been there and it\u2019s a worry, especially if you\u2019ve kept your car [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":18259,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,16],"tags":[],"class_list":["post-1439","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-advice-centre","category-maintenance-repair"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Car Exhaust Smoke and What They Mean<\/title>\n<meta name=\"description\" content=\"So you&#039;ve got smoke coming from your exhaust? What does it mean and should you be worried? 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