Packard Forum Index » V-8 (1955-56)

Hello, today i begin with the conversion to the Olds Oil Pump in my 56 Patrician. The Melling Pump comes with 2 Relief Valve Spring, one like the O.E. Design, one for a higher pressure (+10 PSI).
Should put in the Spring for the higher Pressure or the O.E. Style?

Regards
Karl

Hi, Karl,

If your engine is sound, the installed spring should be OK.
If your engine is worn, you may need the optional spring. It is easier to change oil weights than oil pump springs.

Whichever, install the pump per instructions and verify there is free play, that is the drive shaft can be moved up and down slightly; 1/8" is enough. If there is no free play, grind 1/8"-1/4" off the bottom of the drive shaft.

Usually, no adjustment is necessary, but with the hundreds sold, we've found one or two that were too tight. It seems with the Delco and Autolite distributors, gaskets under the distributor and no gasket, there are variations.

jack vines

Hi Jack,

thank you for the information, i will look for the free play. I think my Engine is in good Condition, it has 47k Mls on Clock. It runs good, but when the engine is hot come and go clutter from the Valve Lifers. I installed new Lifters, but the same.

Karl