Re: One oil pump modification now on file

Posted by PackardV8 On 2012/10/22 19:49:52

It mite be good idea to drill a small relief hole in the bottom plate near center of the bushing to relieve any oil pressure that mite try to push the bushing up the bore.

Some 8 years ago i had a v2v telephone discussion with the PI man in charge of the PI mod. He indicated that they do nothing to the pump except to add the plate at the bottom and push the shaft firther thru the gear. The PI mod ASSUMES starting with a good pump. NOT a pump that needs to be rebuilt. Therefore: "they do not rebuild the pump, they redesign it".

During the 1997 to 2001 time frame the PI web site indicated that the Packard oil pump as delivered from the factory was known to wear out in as little as 25K miles.

I am fully confident that the lower bushing IS needed. About 80% confidence level that the vacuum pump is trouble spot. In my opinion the vacuum pump is cheap, chincy POS that i do not wnat in my engine.