Saturn Engine >> CYL HEAD OIL FEED MODIFIATION ON 91-92 1.9L
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Saturn Engine >> CYL HEAD OIL FEED MODIFIATION ON 91-92 1.9L
Cylinder Head Oil Feed Orifice Caution On
1991-92 GM 1.9L Engines
The AERA Technical Committee cautions members on the cylinder head oiling orifice on 1991-92 GM 1.9L engines used in its Saturn vehicles. The caution expressed involves removing the existing orifice in engines built before 1993.
Apparently under certain situations, this orifice may limit the amount of oil to the cylinder head. Limited oil supply to the cylinder head may cause camshaft or lifter bore scuffing during engine start up. The amount of oil supplied to the cylinder head is controlled by a .157 (4.0 mm) opening in the head gasket.
It is therefore recommended anytime the cylinder head has been removed, that the oiling orifice be removed also. The orifice may be removed by installing a screw into it and pulling it out with a slide hammer.
The AERA Technical Committee
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