1953-1960 Classic Car Engines Troubleshooting Guide: Oil Pressure Relief Valve Leaks

The text for this Guide originally appeared in the 23rd edition of Motor's Repair Manual, published in 1960 and copyrighted by Motor Information Systems, and is used with their permission.

Things to Look For:

1. Relief valve needs tighter adjustment.
2. Relief valve spring weak or broken.
3. Valve seat worn or distorted.
4. Plunger type valve face worn.
5. Plunger type valve stuck open.
6. Ball type valve damaged.
7. Pump discharge pipe or passages leak.

The Complete Guide to Troubleshooting 1953-1960 Era American Classic Car Engines