Re: Packard TSB 56T-20 - Low Oil Pressure
Posted by Eric Boyle On 2009/11/1 16:21:42
Quote:
I have noticed when testing pumps on my rig that the vac pump adds a very considerable load onto the drive motor when present. This additional load may cause the rapid shaft wear so many have noticed. The drive shaft theory is also very intriguing.
I don't think it matters as both Hash and Studebaker owners with Packard V8's also report poor oil pressure, and their pumps don't have the vac pump on the bottom. I had a '55 320 Hudson engine that also suffered from lifter noise and low oil pressure with the stock oil pump on it.
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