Grand AM V6-181 3.0L (1985)
Camshaft Thrust Plate: Customer Interest
Engine - Knocking Noise Just Above Idle
Number 87-6(Gasoline)-68A
Date 11/87
Subject:
NEW DESIGN SPRING AND BEARING ASSEMBLY (CAMSHAFT THRUST)
3.0L 1985-87 LN7 (VIN CODE L) AND 1987 LG3 V6 ENGINES (VIN CODE 3)
"This bulletin supersedes bulletin 87-6(Gasoline)-68 which should be discarded. This bulletin includes a new part number.."
Some of the above engines may experience excessive wear to the front cover thrust surface and the camshaft thrust button. An engine with this condition
may exhibit a knocking noise most audible just above idle. This knocking noise could be caused by the camshaft chucking (fore and aft movement) in the
block.
A needle bearing and spring assembly, Part Number 25532588, is available through GMSPO to address the above conditions. The needle bearing will
reduce wear to the front cover thrust surfaces and the spring has a higher load rating which will reduce camshaft chucking.
