![]() Excessive consumption of oil can be caused by a rupture in the head gasket. ![]() ![]() The head gasket seals these passages as oil moves between the engine block and the cylinder head. Oil passages are cast into the cylinder to transport and return oil to and from the valve train. There are just as many oil passages in the cylinder head as there are coolant passages. Any of these could be signs of a blown head gasket. Does the exhaust seem wet or steamy? Next, check under the hood with the engine running. Is there excess steam or water dripping from the exhaust? Put your hand in front of the exhaust outlet. To check for a blown head gasket, first look at the exhaust pipe with the engine hot and the 1994 Geo Prizm running. A ruptured head gasket can let coolant leak into the cylinders, causing the engine to consume coolant. The head gasket seals these passages to keep the coolant from running out of the passages into the combustion chambers of the engine. There are literally dozens of coolant passages in the cylinder head of a modern1994 Geo Prizm Coolant flows through these passages to pull excess heat out of the engine. Any 1994 Geo Prizm exhibiting these symptoms should be run through a compression test to check the integrity of the head gasket. There are a few warning signs pointing to a blown head gasket. A 1994 Geo Prizm that is running poorly without an apparent explanation might have a blown head gasket, and should be checked for this common problem. More severe leaks can result in coolant and oil mixing (causing loss of lubrication in the crankcase) or complete loss of compression (causing severe problems with drivability). Minor leaks can simply cause the engine to consume extra oil or coolant. It seals the cylinder head (which houses the engine valves) to the engine block (which houses the pistons and crankshaft).
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