If your engine overheats it can cause lots of problems. This happens both due to the lack of coolant as your engine consumes it, but also the efficient combustion process, the excess heat from the exhaust in the coolant and the inability of your vehicle’s radiator to cool the dirty coolant. If you’ve got a blown head gasket, your engine usually will overheat after longer drives. This is the most effective blown head gasket test and can give you a positive sign of a blown head gasket. An easy do-it-yourself test for a blown head gasket is to perform a chemical test using this type of tester on your coolant to check for the presence of exhaust gases to see if this is happening in your car. The bubbles are exhaust gases that force their way into the cooling system during the combustion process. This can cause bubbles to be in the radiator or coolant reservoir making the coolant look like it’s boiling even when it’s cold. Bubbles in the Radiatorīesides allowing coolant into the combustion chamber, an internal head gasket leak allows exhaust gases into the coolant.
If the leak in the head gasket is large this white smoke can often be excessive and billow from the tailpipe. This smoke can be differentiated from moisture during a cold start by a sweet smell and will continue even when the engine is warm. When this happens to coolant burns/evaporates with the combustion process and appears as white smoke coming from the tailpipe. Most head gasket leaks are internal to the engine allowing coolant to flow into the combustion chamber on every intake stroke. If there are no other cooling passages or hoses near the head gasket you may be able to positively identify the leak as a head gasket leak, but if there are other cooling passages nearby, you may need to add a UV dye to the coolant then watch the head gaskets with a UV light to positively identify the leak. Bubbles in the radiator or coolant overflow tankĪ head gasket leaking external would cause coolant to come from below the intake or exhaust manifold and often only happens when the engine is completely warmed up.Coolant leaking externally from below the exhaust manifold.Since a visual inspection usually will not prove a head gasket leak, it is important to know the other symptoms so you can accurately diagnose a head gasket problem. Because much of the gasket can’t be seen without disassembling the engine, blown head gaskets symptoms can be very difficult to diagnose. Since the head gasket seals the coolant passage both from the atmosphere and the combustion chamber you can’t see much of the head gasket on a vehicle with the engine installed. To better understand why a head gasket might blow, check out this article on why head gaskets blow. This can happen regardless of the make or model of your car or the type of head gasket used. Due to the wide range of temperatures and relatively large surface area, it is not unusual for head gaskets to develop leaks over time. This means your head gasket has to seal both extremely hot, high-pressure combustion gases as well as engine coolant which can be anywhere from cold ambient temperatures to the normal operating temperature of your engine. The head gasket forms a seal between the engine block and the cylinder head. To understand the symptoms it can be helpful to understand why a head gasket might fail. Now that we understand what a head gasket it, it’s important to learn what head gasket failure symptoms look like to avoid higher expenses due to additional engine damage caused by driving with a blown head gasket. The head gasket also keeps coolant and oil out of the combustion chamber which is important for the same reasons you wouldn’t want coolant or oil leaking anywhere else. The head gasket is so important because it seals the combustion chamber allowing your car to build the proper compression and contain exhaust gases both of which aid in maintaining the efficiency of your engine. Every modern car has this gasket but they vary in their thickness and construction based on the manufacturer’s design of the engine. The head gasket lives between your engine block and cylinder head. Let’s start by talking about what a head gasket is. If you happen to own one of these vehicles, don’t worry it does not mean that you have a bad car or that you are going to spend lots of money. One such vehicle has such a bad reputation for head gasket problems there is a group of owners trying to get the manufacturer to have a recall on them. There are some makes or models of cars that have a reputation for blowing head gaskets.
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