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Jeep Engine >> VALVE RETAINER & KEEPERS MAY CAUSE CLATTER NOISE


Valve Clatter Noise On
1984-86 American Motors 2.5L (150 CID) Engines

American Motors Corporation reports that a loud valve clatter may develop in the 2.5L (150 CID) engine found in some late 1984 to early 1986 Chrysler (Jeep) vehicles. This noise may be caused by the rocker arm contacting the valve spring retainer due to deformed valve locks. See Figure 1.

When replacing deformed valve locks, replace the valve spring retainer as well to prevent this condition from reoccurring.

AERA members should also be aware that two styles of valve stem grooves were used on the 2.5L (150 CID) engine during this time period. One valve has a chamfered groove bottom while the other does not have a chamfer (see Figure 2). Both styles of valve stem grooves are acceptable and use the same valve locks. The style of the valve stem grooves is not a factor in the deformed
valve lock condition.

Replace the valve locks with AMC part #324 2664 and the valve spring retainer with AMC part #324 2661 or use aftermarket equivalents.

The AERA Technical Committee
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