| Oldsmobile 442 Engine >> OVERSIZE VALVE LIFTERS AND GUIDES |
Oversize Valve Lifters & Guides On Some GM (Olds) 5.7L (350 CID) Diesel Engines
Some GM (Oldsmobile) built 5.7L (350 CID) diesel engines may be equipped with one or more oversize lifters and oversize valve guides.
If there is an 0 cast into the side of the lifter boss as shown in the diagram below, that lifter is oversize. Oversize lifters are .010 larger than standard diameter lifters.
To determine an oversize valve guide, check for the number stamped into the cylinder head just above the intake gasket surface. The valve next to the stamped number is oversize. The number indicates the size of the guide. For example, a 13 indicates a .013 oversize guide.
The AERA Technical Committee
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