Acura Engine >> OIL STARVATION OF THE CYLINDER HEAD
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Acura Engine >> OIL STARVATION OF THE CYLINDER HEAD
Oil Starvation Of The Cylinder Head On
1986-89 Acura 1.6L Engines
AERA machine shop personnel are reminded to thoroughly clean the vertical oil passage in the cylinder block when rebuilding 1986-89 Acura 1.6L engines. This engine also uses an oil control jet at the block deck in that vertical oil gallery. It too must be removed, cleaned and free of obstructions. Note that the opening of the control valve is only .040 (1.02 mm) in diameter (see illustration).
Anytime the cylinder head is removed from the engine, the oil control jet needs to be removed from the gallery. Once removed the vertical gallery should be flushed from the lower oil supply gallery. Pressurized air will work if the engine has been disassembled. If the engine has not been removed from the vehicle, oil can be forced through the gallery by turning the engine with the starter. Be sure to install a new gasket under the control jet before positioning the cylinder head gasket and mounting the head.
Failure to reinstall the oil control valve will force too much oil into the cylinder head. This may render the valve seals ineffective or overwhelm the PCV system, causing excessive oil consumption.
The AERA Technical Committee
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