oil pump shaft too long?

Ken
12/29/07

I came across this situation twice lately. SBC, seems like oil pump shaft to distrutor is too long. When you install dist. it sits about 1/4" above intake manifold. Well the shaft between the pump and dist. is ok but the shaft on the pump is possibly too long? anyone experience this before? Had to shim dist on one and thinking of using a dist with a adjustable collar on other. What do you think? Thanks Ken

Chevy Guy
12/31/07

It sounds like you don't have the distributor in correctly and it is not going down into the slot in the shaft as it should.

57 belair
1/1/08

chevy guy is correct. you need to get to the motor that you shimmed the distributor and remove the shim. the oil pump wont be able to pump oil. there are a couple ways to get the distributor to drop down into place. one is to turn the motor over by hand by turning the fan blade until the distributor drops down another way is to pull the coil wire and start the motor in a couple second spirts until the distributor drops down. good luck

JIM
1/2/08

Ken, I do not know if you know this, but' make sure that the oil pump rod that you are using is for a SBC, and not for a BBC motor. Because the BBC oil pump rod is a 1/4" longer then a SBC oil pump rod. If you make sure of this, then after you bump the starter, then the distrutor should fall in.

bob
1/2/08

make sure the slot is clean and shaftis all the way in theplastic clip this caused this type of problem

bill
1/2/08

distributor shim have never heart of such a thing

ken
1/2/08

The engine that was shimed has plenty of oil pressure and is currently running in a car. MSD and others makes shim kits. I think I may have found my problem, I found a different part number for a Chevy II oil pump shaft in Summit online catalog, had the owner order one. Hopefuly it is shorter than the standard SBC one. I will let you guys know what I find. Ken

larry
1/3/08

where did you find shimes

larry
1/3/08

where did you find shimes

larry
1/3/08

where did you find shimes

Mr. Bowtie

Try Summit at 1 800 230–3030 or Jegs at 1 800 345–4545 for distributor to intake manifold shims/washers for your small block Chevrolet engine

JIM
1/4/08

Ken, The shims/washers that I think you are talking about, is a gasket, that is made of a thin fiber gasket. What it is use for, keeping oil from coming out a round the distributor shaft. If they make shims/washers for a distributor let me know, were and who, has them! Because, I would like to check it out for myself.

Ken
1/7/08

Jim try MSD part number 8495 shim kit, Summit has them. OK just to let all of you folks know , be aware there is a different oil pump shaft for oil pump for Chevy II front sump pans. It is 3/8" shorter. Melling part # is MEL-IS-55D. Thanks to all of you for your input. Ken

THE REAL DOCTOR
1/8/08

These shimes are not fore stock motors the are used when the block has been decked or the heads have been milled gm left enough clearance to not have aproblem l

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