Oil Pump Problem - What a Mess!

[Bob Pakenham]

I recently had my GN engine rebuilt. The shop ordered 2 sets of timing cover gaskets to accomodate the existing booster plate. On initial engine startup I had oil everywhere because it was blowing by the oil filter gasket. Check out the attached picture of the booster plate and new gaskets and see if you see the problem.

 

[Quick6'n'-K.C.]

ummm im going to go with door number 2 for the win...

 

[mikestertwo]

Did you modify the cover so the pressure regulator works?

 

[Quick6'n'-K.C.]

With the picture i posted above one gasket is totally wrong, they used 1 gasket from each kit.

Amazes me they could even build the engine1?!?!?

BW

 

[Bob Pakenham]

Mike -
The thrust/booster plate has not been altered since I bought it as part of a kit. My recollection is that a pressure regulator spring came with it. Just have to modify the 2 gaskets so that there is flow thru both elongated holes in the plate.

Bob

 

[Quick6'n'-K.C.]

Bob- do you understand the directions i posted?

BW

 

[turbojimmy]

I'll be doing this job soon so I have to ask: what difference does it make? Using two gaskets with the gear pocket cut out shouldn't matter, should it? Mine was leaking so I took it apart and used two 'stock' gaskets (one on each side of the thrust plate) and it didn't hurt anything (didn't help either). Still leaks, but oil pressure is fine.

I've since got a new front cover and pump housing along with gaskets, thrust plate and shims from TA Performance. Need to find time to install.....

Jim

 

[mikestertwo]

Mike -
The thrust/booster plate has not been altered since I bought it as part of a kit. My recollection is that a pressure regulator spring came with it. Just have to modify the 2 gaskets so that there is flow thru both elongated holes in the plate.

Bob

Bob,
You have to modify the pump cover (oil filter adapter) because the pressure relief passage does not line up with the hole in the plate. You have to grind or machine a passage in the cover.

 

[Bob Pakenham]

Mike -
To avoid confusion, is it possible to call you? If so send ph # to bobpak@comcast.net rather than post here.

Thanks,
Bob

 

[mikestertwo]

Email sent

 

[Quick6'n'-K.C.]

Please post photos of the modification when you get a chance

BW

 

[Bob Pakenham]

In this thread there are 2 different booster/thrust plates referenced. My plate at the beginning of this thread required that the relief valve recess on the oil filter half of the oil pump be extended so that oil could be passed thru the smaller of the 2 elongated holes in the plate. The problem I had was that 2 standard non-booster plate gaskets were used. Once I cut the small elongated hole out of both gaskets oil from the relief valve can now flow threw the smaller elongated hole to the channel in the timing cover half of the oil pump where it then gets fed to the back end of the gears. It doesn't matter that both gaskets have the gear opening in them. The gasket picture provided by Quick6'n'-KC Bryan is a different plate than mine. The top gasket in his picture is a standard gasket that would go on the timing cover side of the plate. Assuming the lower gasket in the picture matches all holes in the plate that came with it, the fatter elongated hole would align with the relief valve recess on the oil filter side of the oil pump and oil would flow thru it to the front side of the oil pump gears.

 

[Quick6'n'-K.C.]

Ive never dealt with the plate your picture shows, where did it come from?

So you had to bevel out the oil filter side, then cut the gasket to match?

BW

 

[turbofabricator]

I've used alot of those over the years. Kenne-Bell booster plate. Arguably invented by Jim Ruggles. They are no longer available. Not sure they are really needed if you set the oil pump/timing cover up correctly. If I build an engine that already has one, I do re-use it, though.

 

[turbojimmy]

In this thread there are 2 different booster/thrust plates referenced. My plate at the beginning of this thread required that the relief valve recess on the oil filter half of the oil pump be extended so that oil could be passed thru the smaller of the 2 elongated holes in the plate. The problem I had was that 2 standard non-booster plate gaskets were used. Once I cut the small elongated hole out of both gaskets oil from the relief valve can now flow threw the smaller elongated hole to the channel in the timing cover half of the oil pump where it then gets fed to the back end of the gears. It doesn't matter that both gaskets have the gear opening in them. The gasket picture provided by Quick6'n'-KC Bryan is a different plate than mine. The top gasket in his picture is a standard gasket that would go on the timing cover side of the plate. Assuming the lower gasket in the picture matches all holes in the plate that came with it, the fatter elongated hole would align with the relief valve recess on the oil filter side of the oil pump and oil would flow thru it to the front side of the oil pump gears.

Got it - thanks. I wanted to make sure I didn't screw something up with mine by using the same gasket on both sides of the plate. All my holes lined up, though.

Jim