BMW Engine >> COOLANT IN THE ENGINE OIL SUPPLY

BMW Engine >> COOLANT IN THE ENGINE OIL SUPPLY

Coolant In The Engine Oil Supply On
1991-93 BMW 1.8L Engines

AERA members have reported coolant in the engine oil supply on 1991-93 BMW 1.8L engines. The cause of this condition may be the result of a deteriorated front cover gasket and/or the erosion of the timing cover mating surfaces. That leakage may allow engine coolant to pass around the gasket and enter the engines oil supply. This condition may also show evidence of external coolant leakage at the engine's front timing cover aera.

In most instances, if the cover is leaking externally, it is also leaking internally. Ignoring a slight amount of external leakage, may lead to extensive engine damage if it is also leaking internally.

Vehicles built after approximately 10/1/93, have a revised optimized rubber material composition and reduce the possibility of this problem occurring.

To repair a metal erosion condition, BMW authorizes the use of a metal epoxy type repair to the gasket mating surfaces of either the cylinder head or timing cover. Many AERA shops have been successfully welding those areas.

The AERA Technical Committee

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