Engine and Transmission Tech

Did you find oil in the pump after spinning it? if so, maybe the relief valve is leaking, if not there is a leak on the suction side.

I unscrewed the relief valve nut. I replaced the washer with a fiber one and compressed the spring and tightened the nut. The engine has not cranked very quickly. Timing light showed only weak spark. The battery date says 09/2016 so I am replacing it today.

I have continued to chase the "no oil pressure demon" without success. I have just pulled the new cover I bought from Silver Seal and measured the depth of the pump chamber. My rough measurement is 0.890. I also measured the chamber depth in the old (1961-63) cover which reads 0.875!
I have never heard of any of these Buick v8 or v6 engines having an altered depth in the pump chamber. This explains why the pump gear is slightly below chamber level whereas originally the gears extended slightly,
This also explains why I have never gotten ANY oil pressure despite checking out all the possibilities you guys have suggested.

Am I the only forum member who has encountered this problem? If you had this problem how did you rectify it? Any thoughts, suggestions are appreciated.

BuickV8 board mentioned this issue. Gears should stick out slightly. Sand down .015 maybe.

Jerry,

Please go back to page one of this thread and read what Roger went through. There is a spec for how much the gears should be proud of the cavity. You needed to measure this long ago to pick the thickness of gasket prior to assembly. Sorry you are finding this out the hard way, many different gasket thickness are in the market and material. Thin ones out of a paper like material don’t crush much but thicker ones most certainly do making it hard to pick the correct casket. Easiest to assemble it to make sure gears don’t bind in the cover, but not loose to give lower or no pressure. Check out the Buick links listed by Carl etc for further help. They give details on the pump and also porting the cover and pump to help flow/ pressure loss.



Edited 1 time(s). Last edit at 06/03/2020 08:15AM by mstemp.

"I have just pulled the new cover I bought from Silver Seal and measured the depth of the pump chamber. My rough measurement is 0.890. I also measured the chamber depth in the old (1961-63) cover which reads 0.875!
I have never heard of any of these Buick v8 or v6 engines having an altered depth in the pump chamber."


Is your new Silver Seal timing cover a Buick 215 cover or a V6 cover? Did you buy the one that comes with new gears?

Great page with Buick Oiling Mods.

[www.rowand.net]



Edited 2 time(s). Last edit at 06/03/2020 10:11AM by MGBV8.

Double check that you didn't receive a timing cover for hi volume & are using standard pump gears in it.

Hi Jerry,

what happened to the oil pressure problem? I am struggling with similar symptoms and cannot find a solution. Mybe i can learn from you

I'm looking forward to an answer,

Michael

What indeed... too often on forums one sees the problems but the OP forgets to post the solution. Been there done that.

Is the pump priming OK? Flow but low pressure?
One thing I never mentioned, if the pump won't prime then all the time it's being rotated with the drill the steel gears are rubbing dry against the alloy cover, and they can wear a nice circular gouge in it.

So a pre-oiler as mentioned by Todd on page 1 is well worth setting up to avoid this.

Ivor

Either take the cover to the shop and have them cut .020" off the mating flange or some very careful work with a belt sander, a micrometer, and a large new fine cut file. Then use the TA shim pack to set end clearance to about .0005" and pack with vasoline before startup. A little porting and polishing helps.

Jim