Technical Oiling issues on Small Journal 327, no oil pressure at idle

I am still on hold. I am building
A run stand and I have had some family issues we are dealing with. I will get back on it soon. Thanks for checking on me.

 

Tried something new today. working on an International tractor low oil pressure at idle warm. dropped the pan checked oil pump and mains ok. I rigged up a rubber tipped blow gun to a can of Ac leak detector and pressered the engine at the gauge fitting couldn't use the pump port. Found a crack in the block.

 

Root, dont forget us. We are sitting on the edge of our seats waiting to hear the solution

 

I have a test stand ?

 

So, the test stand is finished and I am a little bummed. The 327 has oil pressure now, 30 psi, but after an hour of priming and rotating the engine I have very little oil to the rockers.

I am suspect of the hydraulic roller lifters. Intake back off.....

A crate motor may be in my future.

 

No oil when it's running or when you are priming?

 

Is your rocker ratio correct ? Meaning do you have correct length push rods. If push rods are either to long or to short that's not good to begin with. The least of it is the oiling hole will not line up. While you have intake off prime engine and watch the lifters with out anything on them to see if they oil freely that way.

 

I bought Comp Cams adjustable pushrod to check the length. I ordered special length pushrods. I just checked the pattern on the valve tips and they are smack dab in the middle.

I have pulled the intake and the lifters all seem to have oil in the cups. I also went and bought a 2500 rpm drill hoping that maybe mine was too slow, but alas, the world has gone to keyless chucks and this one won't stay tight, so it goes back tomorrow.

I thought about running the plungers the full travel to see if maybe they were just sticky from sitting. I primed it collectively probably 30-45 min and a buddy was cranking it over with a ratchet.

Clay, no start yet. Just priming.


It's getting very frustrating to say the least.

 

You do realize the cam and oil pump turn 50% less rpm than the crank. A 2500 drill speed would be equal to 5000 rpm on the engine.

 

I was thinking the opposite.......

 

What Dizzy are you Running, if the oil hole in the block does not line up in the center of dizzy grove ,Oil will blead off , most do not know to check this, they just dope in Dizzy ,
( & O -Ring are not going to take care of this if not )
Some time's you have to add shim's or remove material from intake ,collar, then you have to check shaft to pump , gear to came location ,
yr lifter's , if oil hole where drilled wrong location , top end will dribble oil .
Have you checked all clearances your self , whith good know and correct mic & inside mic.
I have seen very loose SBC with drill have over 45.

 

I may just have to drop it off somewhere and let someone else look at it. I am really tired of it at this point. I'll use it in another project, I am sure. It's got all new, good forged internals. It wasn't a cheapo build.

 

Does not have to be a cheap build to go SOUTH!!!
I had a $7,000 SHORT BLOCK go bad in 15 mints , $600 lifters was the cause !!

 

This may sound like a cop out, but I am done with this for a while. I ordered a crate motor last night. I need to get the Produce truck on the road and then I will revisit the 327. Maybe next winter. We are putting on 6 Hot Rod Hundreds this year and I need to be on the road before April. I'll keep this post informed on what I find.

 

Sometimes ya gotta take a step back

 

Nothing wrong with doing what needs to be done for ones self. Looking forward to hearing more on this when your ready.

 

I'm a bit green on GM stuff but I seem to recall cam is different on rear lobe on early vs late 283 cams . Anyone remember this ? Something different , that's why I never use them , I don't want to be different !

 

I belive oil grove , & different Dizzy for oiling all so ,
( oil groove on dizzy)

 

So, just for giggles and since it was already on the run stand, I busted it off. I poured some oil on the rockers just in case. It ran for 2.5 minutes and carried an oil pressure of 25 lbs at idle and 40 when you would run it up a bit. No bueno. Not a drop on the rockers. I am suspect of the roller lifters.

 

Just to ease my mind, I pulled the rear plugs and used a grease pencil to mark the distributor to ensure the oil groove was lined up. It was. I also marked the first set of roller lifters through the same galley. It came out right in the middle of the notch in the lifter, so i guess thats right. Now, I have to try and find out where the oiling holes are supposed to be located. I called Howards and they seem to think it's not the lifters. I am still suspect.

 

Replace one of the roller lifters with a standard lifter and hand crank the oil pressure. If the one you replaced oils the rocker you found the problem.

 

That's kinda where I am.....Howard's is pulling a couple of different lifters for reference to measure for me. Gonna call them back tomorrow and see what they found out.


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Thought I would check back in to see what happened to this deal or should I say ORDEAL. unbelievable. This goes back to June. I have to commend you for being relentless. Any new news? Lifters?

 

I haven't sent them back to them yet, planning on trying one more thing, then they get boxed and shipped back.

 

I'll appologize in advance if this has been covered, 2 problems I've fixed in the past with separate engines, no oil gallery plugs in the front of the block ( behind the timing set ) and the rear cam bearing not installed far enough into the block

 

Yeah, both are good. Thanks

 

I did not read all of this. Maybe a stuck oil pump bypass spring/valve. Rear cam bearing clocked wrong. Rear cam journal not grooved.

 

No, no and no.

 

Hey I didn't read all this thread but did you check and see if the blinker fluid was low? How about the muffler bearings? Within spec? I believe for 1965 327 .0000000000000000001 is in tolerance? Maybe you should have painted the motor/engine hugger orange?

 

Nothing wrong with that. Sometimes you gotta walk away, revisit later. Like you said, you are gonna be THE goto guy for sbc oil stuff from now on!!