sbc oil pumps
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sbc oil pumps
Posted: December 30 2007 12:22 AM
 
ken ching (aka CK) [ View ] [ chingk001@hawaii.rr.com ] [ Car Ads ] [ Blogs ]
mililani, Hawaii
 
Hi guys i need help. Came across this situation twice lately. Installed distribtor and it sits about 1/4" above manifold. Replacing a sbc in a early Nova (front sump) took off pan and pump from existing engine, installed on different sbc, dist. is up about 1/4" above intake manifold. Looked good at old engine seemed same way with different dist, they used multiple dist gaskets. Had this same problem a few months ago with another engine called MSD and everything, had to shim under dist or use a adjustable collar dist. What do you guys think? Anybody experience this? Cant tell you brand of oil pumps but I think the shaft on the pump is a litte long. am I misssing something here? Thanks Ken
 
 
Comments
 
Posted by bigdude  -  12/30/2007 09:13 AM
I cant believe you would put an old pump back on when you have it off. Chances are thats where your problem is -or you have a dist for a tall deck.
resident know it all [ View ] [ Email ] [ Blogs ] [ Car Ads ] Three Rivers, Michigan Charter Member since January 2004
 
Posted by softtail1334  -  12/30/2007 09:58 AM
I run into that years ago on 64 ChevyII. A front sump setup has a shorter rod between pump and distributor. You might try Paddoc for new rod
David [ View ] [ Email ] [ Blogs ] [ Car Ads ] Excelsior Springs, Missouri Charter Member since December 2005
 
Posted by Jaybird  -  12/30/2007 10:26 AM
There is also a machined adapter for that situation. comes with shims an all. I thinkit is a Mr. Gasket item. Got mine from Summitt
Jaybird [ View ] [ Email ] [ Blogs ] [ Car Ads ] Cincinnati, Ohio Charter Member since December 2003
 
Posted by Streetrodder007  -  12/30/2007 09:52 PM
I have found that there is 2 lenghts of oil pump shafts, also the distributor drive gear has been machined in different sizes also. I see this problem on different sbc motors I have built. And yes it will drive you nuts. I bought a cheap HEI off the net for $50 and the drive gear cross shaft was slightly larger than a good $150 HEI, they looked so close, but when I took everything apart, the oil pump shaft would not seat in like it was designed, only touch. You can change the gear by pulling the cross pin, but its a pain.
Streetrodder007 [ View ] [ Email ] [ Blogs ] [ Car Ads ] Port Huron, Michigan Charter Member since April 2006
 
Posted by Streetrodder007  -  12/30/2007 09:58 PM
Just another thought, after I prime a new Chevy motor prior to firing it, I put a long slotted screwdriver down into the oil pump shaft and spin it so it is facing the #1 cylinder, then when you drop the distributor, the rotor will be very close to where it should fire, you might have to pull it out a couple times and guess where you need to adjust the rotor before you drop it again, such as forward or back 1 or 2 teeth. That way the distributor hole closest to the #1 cylinder will be right on, ready to fire. An old trick of the trade !
Streetrodder007 [ View ] [ Email ] [ Blogs ] [ Car Ads ] Port Huron, Michigan Charter Member since April 2006
 
Posted by CK  -  12/30/2007 10:40 PM
Thanks everyone for your suggestions. I am just helping someone put together a buget car, if it were mine I would have bought a new pump and rear sump pan, but anyways, I think I found the problem. Yes there is a different shaft for a Chevy II pump. Owner is ordering it, hopefully it is shorter than the one that was in there to begin with because someone else installed the wrong one to begin with. Thanks again I will let you know what it is when we get the other shaft, none here on the islands. Thanks Ken
CK [ View ] [ Email ] [ Blogs ] [ Car Ads ] mililani, Hawaii
 
Posted by softtail1334  -  12/31/2007 10:57 AM
Ken, a rear sump pan will fit if you dimple the front corners of the sump with a 1" pipe. It has to be an old style pan with a single sump and not a step down sump
David [ View ] [ Email ] [ Blogs ] [ Car Ads ] Excelsior Springs, Missouri Charter Member since December 2005
 
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