Engine overheating is the number one cause of head gasket failures, according to Mobil Oil. The cylinder head and engine block expands beyond acceptable limits while overheating, which leads to head gasket pinching. Improperly torqued head bolts and abnormal air fuel mixture combustion are common reasons as well.Know More
Head gaskets are made of compressed multiple layers of steel that are held together by a rubber-like coating that acts as a sealant between the engine block and cylinder head. Most modern cylinder heads are made of aluminum, which has a higher thermal expansion rate than steel and iron. Excessive overheating causes the cylinder head to expand and crush the head gasket into failure.
The main function of a head gasket is to hold engine compression while keeping oil and coolant circulation separate. Undetected blown head gaskets cause coolant and oil mixing, which could lead to severe engine damage, such as engine block cracking.
According to HowStuffWorks, head gasket failures are fairly easy to diagnose. The common symptoms include constant overheating, low oil and coolant levels and white smoke mixed with water coming out of the exhaust pipe.
The head gasket is seated between the cylinder head and the engine block, and replacing it can be difficult because a mechanic needs to remove a large set of engine components, according to Cars Direct.Learn more about Technology
The check engine light may come on for various reasons including if the gas cap is loose, oxygen sensor needs replacing, spark plugs need replacing and catalytic converter has a problem. It is a good idea to check the engine when this light comes on because it usually indicates a problem of some sort.Full Answer >
A blown head gasket has several symptoms that include overheating, cloudy oil mixture and white smoke blowing from the tailpipe. Once the head gasket is blown it will need to be replaced. However, there are commercial products that offer short-term fixes for smaller leaks.Full Answer >
A car with a blown head gasket can be driven, but it is not recommended. Blown head gaskets are caused when an engine overheats, and if a car is driven with a consistent overheating problem, it leads to eventual engine failure.Full Answer >
Liquid glass can be added to a coolant system on a vehicle to seal leaks caused by a blown head gasket. It is a sodium silicate that crystallizes in cracks when it dries, providing a temporary barrier and is most effective when used on cars with iron cylinder heads.Full Answer >