February 2, 2021
Although we’re starting to see a shift towards electric cars, the vast majority of vehicles on North York roads are those powered by fossil fuels. The chances are that the car parked in your driveway is, in fact, powered by gas. And one by-product of internally combusting fossil fuel is emissions from your vehicle’s tailpipe. However, did you know you can learn a great deal about the health of your car’s engine by observing the colour of your vehicle’s exhaust emissions? If you want to learn the causes of white smoke from a car exhaust or the causes of black smoke from a car exhaust , we suggest you read on to find out more. Black Smoke — Why? If you’ve ever noticed black smoke from your car’s exhaust , your natural reaction may be to panic. While most modern vehicles no-longer emit big, black clouds of car smoke from their exhausts, there could be a few reasons as to why this is happening. Firstly, it depends on whether your car is powered by petrol or diesel. If petrol, then the cause of black smoke from your car’s exhaust may simply be a case of poor air-fuel mixture. Combustion takes place by combining air and fuel with a spark. If there’s too much fuel, this can lead to black-coloured smoke. Rather than a cause for alarm, a quick visit and diagnostics scan by a trained automotive repair shop should help you get the problem identified. It could be as simple as a faulty sensor, a clogged air intake or filter or problematic fuel injectors. All of these fixes are relatively simple. If you’re driving a diesel-powered car or truck, then there may be a couple of other explanations behind the cause of black smoke from your car’s exhaust. If you own an older diesel-powered vehicle, then some amount of black smoke under load (such as hard acceleration or climbing a steep incline) may be expected. If you own a modern diesel with a DPF (Diesel Particulate Filter), then the occasional plume of black smoke may be down to the expulsion of built-up soot. In either scenario, it shouldn’t be a cause for concern. White Smoke — Should I be worried? A little white smoke from your car’s exhaust on start-up shouldn’t be cause for concern. On a cold day, it may not be smoke at all and just steam or condensed water. However, if you see larger plumes, the causes of white smoke from a car’s exhaust may necessitate a trip to a car specialist. Consistent white or grey smoke could be caused by your car’s coolant mixing with the engine’s combustion process. This isn’t good, as the coolant should never be part of such a process — and this means that if it has found its way there, there has to be a serious underlying problem. The first suspect may be the head gasket, which will inevitably lead to overheating. More seriously, it could be a blown cylinder head or cracked engine block — both of which are potentially catastrophic for a car’s engine. No matter the cause of white smoke from a car’s exhaust , you should stay vigilant and get it checked out. While it may be nothing, bringing it to a specialist auto shop may be best to stay on the safe side. Blue Smoke — Potentially Serious Finally, blue smoke — often very light blue or even pale grey — may be indicative of a more severe issue with your engine. Blue car smoke from an exhaust is a symptom of oil being burnt during combustion. This isn’t the same as an oil leak that leaves a patch on your driveway. This, rather, is an internal leak, which will eventually drain the engine of oil (perhaps without you even noticing it)! Blue smoke could be the result of a leaking valve seal — or worse, a piston ring. Both jobs require a partial engine rebuild, at the least. If you own a vehicle with a turbocharger, blue smoke may indicate an issue with the turbo. This may be accompanied by poor performance, such as sluggish acceleration. Once again, if you sight blue smoke in your rear-view mirror, it’s best to get your car inspected. Book an Appointment with J&E Tokyo Auto Collision If you need professional advice on why you’re witnessing car smoke from an exhaust , then our experts at J&E Tokyo are happy to help. We provide the best car and fleet repair services for customers in North York and can help with a proper and accurate diagnosis of any suspected fault on your car or truck. Give us a call at 416-743-8888 to learn more about our services or book an appointment with our team today!