olds 307 knocking?

[ERIC87442]

I did that exact thing. He thought it was a lower end knock as well.

 

[pontiacgp]

if that's what they think then how did they explain they found nothing when the tore it down?

 

[ERIC87442]

He didnt have an explination. Said it checked out fine not sure what we were hearing. Maybe a lifter wasnt priming. He was pretty worried about the lack of oil coming out of the head when i had the valve cover off. But they researched it and i guess thats common and normal for this engine to not be squirting oil everywhere.

 

[pontiacgp]

If they think it's a lower end knock then they ought to be offering to tear the engine down again cause they obviously missed something but then again if that had to research what oil should be present in the head then they shouldn't be building theses engines

 

[85olds]

Have you pulled the fly wheel off and looked very close for cracks near the bolt holes. I have seen some flywheels crack there on other vehicles?

 

[ERIC87442]

Got it in and running. Same knock. Flex plate is ok. I listened to it again. It seems only to be slightly off idle if you hold it there its the loudest.

 

[85olds]

Assuming the engine rebuilder knows what they are doing...Have you put a mechanical oil pressure gauge on to see actual oil pressure? it must be something that is bolted to the engine eg. fuel pump (broken spring, have seen that on gm 305 and 350 years ago) distributor gear /shaft going up and down, bad engine mounts,
Noises will travel through the block and sound like it is somewhere where it's not..
Keep us posted

 

[ERIC87442]

We have not read actual oil pressure. They did not run it. They herd it run in the car. My gauge has always been correct, im awear it could be wrong, but i think there would be more noise with poor oil pressure. They think its a lifter not priming. Im going to remove the intake and valve covers and pull lifters apart and see if somethings screwed up. The noise is in the back passanger side of the engine. This may turn into an over winter project due to funding.

 

[ERIC87442]

Fuel pump and distributor are good suggestions. How would a guy go about checking them?

 

[L92 OLDS]

I have a nice low mileage 80K Vin 9 307 from my 87' 442 that needs a home. Hopefully you can get your issues worked out but if you end up with major issuess and need a drop in solution give me a shout. I'm on the West coast of Michigan.