Solving the Oil Pump Problem!

The Details

Rear view of the adapter. The reliefs on the bottom are to clear the stock rear main cap bolts. The adapter is machined from mild steel. NOTE the 5-degree angle of the pump mating surface.

This side of the adapter mates to the rear main cap. The 3/8NPT plug in the center is for the companion full-flow oil filter conversion only. It seals the hole which connects the pump to the oil gallery in the rear main cap. If only the Olds pump is to be fitted (no full-flow conversion), then this hole will be open.

This side of the adapter mates to the Oldsmobile High Volume oil pump. "P" marks the two clearance and countersunk holes to attach the adapter to the rear main cap using the original pump mounting holes. "O" marks the two threaded holes for attaching the Olds oil pump to the adapter. These holes are drilled at a 5-degree angle relative to "P" holes. "G" marks the passage from the pump to the oil gallery (plugged in this example). "D" marks the clearance hole for the driveshaft from the distributor.

This shows the allen-head cap screws used to attach the adapter to the rear main cap. The holes are countersunk so they will not interfere with the Olds pump mounting face.

A pump-to-adapter gasket was made from 0.010in brass shim stock. This version does not have the center oil passage hole because of the companion full-flow oil filter conversion. Brass was used to make the gasket because there is a slight overlap between the discharge hole in the Olds oil pump and the two counter-sunk holes ("P" above).

The Olds High Volume oil pump is attached to the adapter with brass gasket in place. The AN-10x3/8NPT fitting in the side of the pump is for the companion full-flow conversion only.

The Olds High Volume oil pump adaption bolted to Kevin's engine.

The Olds pump, adapter and driveshaft may be installed with the engine in your Packard!

Contact the webmaster for price and how to purchase.

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