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Pontiac Engine >> SMALLER ROD BEARING JOURNALS
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Undersize Crankshaft Diameter Caution On
Some 1975-76 GM (Pontiac) 3.8, 5.7 & 6.6L
(231, 350 & 400 CID) Engines

Some 1975 & 76 - 3.8, 5.7 & 6.6L (231, 350 & 400 CID) engines may be equipped with crankshafts with rod journals which are .010 smaller than standard.

These crankshafts are identified by a daub of orange die on the counterweights next to the rod pin. In all cases, all rod journals will be the same undersize. If one rod journal is .010 undersize, all others will be the same. Rod bearings will also be marked with the smaller dimension.

This condition affects rod bearing journals only. Main bearing journals will be standard size.

The AERA Technical Committee

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