Re: Deja Vu

Posted by PackardV8 On 2011/11/20 15:37:48

A few years ago there was some talk of vacuum pumps "improperly fitted",most likely from the factory. My very original low milearge 56 Exec (34K miles when i boufht it 13 years ago) had a loose vauum pump. The screws holding it to the oil pump were loose. The pump input shaft was very difficult to turn.

Conjecture: THose that have experienced trouble free high mileage service from oem Packard pump probably had a vacuum pump that was correctly installed. OThers had vacuum pumps NOT correctly installed thus causing premature wear of input shaft to the oil pump.

But even after i tightened the vac pump screws the input shaft to oil pump was still difficult to turn by hand (no significant oil resistence in pump).

I agree with Craig that the entire oem Packard oil pump/vac pump set up is a weak/poor at best design. Vac pump or no vac pump.

What we really do not know at this time is exactly what Aller did to the pumps other than a bushing and details of the bushing are unknown (oil grooved/ oil galley cut ala SBC pump, lock washers under vac pump screws, etc ???).

AS per a PI website write up ca 1998 - 2002 i will paraphrase : " Packard V8 oil pumps were know to need rebuilding in as little as 25K miles".

Does noone else remeber that from PI????