Buick Oil Pump Wear
Photos by Gary Fanning
Text by George Nenadovich
Here is a nice photo of the Buick oil pump gears and the
circular wear pattern on the gears after many miles.
Another good shot of how the gears have worn the oil pump
housing. These circular grooves lead to poor oil pump pressure and oil aeration
(air bubbles in oil).
A nice closeup of the deep scoring in the cover. Best way
to cure this problem is to order a new oil pump housing from Northern Auto
Warehouse for $90 for the 350 engines. Sometimes you can use 60 and 220
sandpaper and a flat machined surface or piece of glass to remove the scratches.
New ones are now available for the 455. TA Performance has
casted new ones. Call Northern at 1-800-831-0884 for 350 pumps or TA Performance
at 602-922-6808 for more info!