![]() ![]() ![]() This will result in contaminated oil (the white milky sludge or "milk shake" associated with a blown head gasket) and a compromise the cooling system. If the head gasket fails between an oil gallery and a water passage it will allow the engine oil and coolant to mix. This will eventually cause a drop in engine oil levels, and will also cause blue smoke from the exhaust from burning oil. ![]() The same failure will also allow the piston to suck oil into the cylinder, where it will be burned off as part of the combustion process. Hot compression gasses will compromise the lubrication of vital bearings, such as the crankshaft main bearings. If the head gasket fails between the cylinder and an oil gallery,compression will enter the oil system and pressurize the crankcase. When the coolant level drops too low the engine will overheat. If a head gasket fails between a water passage and the outside of the engine, the cooling system will eventually run low on coolant. This one’s not as easy to spot as some of the others, especially if the leaking coolant dribbles to the ground while driving, or evaporates, and leaves little trace of where it is leaking. When a gasket does fail, it can do so in a number of different ways, and each failure will result in different symptoms: 1) Coolant to outside leak A cylinder head gasket is one of the most stressed gaskets in an engine, because it has to simultaneously seal oil, coolant, and engine compression away from each other and the outside. ![]()
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