Oldsmobile Engine >> PREMATURE ROD BEARING FAILURES
Oldsmobile Engine >> PREMATURE ROD BEARING FAILURES
Premature Rod Bearing Failures On
Some GM (Oldsmobile) 6.6, 7.0 & 7.5L
(400, 425 & 455 CID) Engines
Some premature rod bearing failures have been experienced especially in the 6.6, 7.0 & 7.5L (400, 425 & 455 CID) Oldsmobile engines.
In checking these engines it was found the side clearance on the rods was less than the minimum specifications.
The side clearance is necessary to allow enough oil to flow for proper heat dissipation. We suggest when rebuilding these engines, rod side clearance should be checked and increased when necessary to fall within manufacturer's specifications.
The AERA Technical Committee
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