Re: Low oil pressure in ZL-1
 

Triple check the bearings.

Re: Low oil pressure in ZL-1
 

Is this a new ZL-1 Chevy block 053 casting? it does use a relief valve under the oil filter. Make sure is was installed and staked in the correct hole as there are 2 holes it fits in. If not there, could be your problem.

Re: Low oil pressure in ZL-1
 

[ QUOTE ]
Is this a new ZL-1 Chevy block 053 casting? it does use a relief valve under the oil filter. Make sure is was installed and staked in the correct hole as there are 2 holes it fits in. If not there, could be your problem.

[/ QUOTE ]

I dont remember puttng that in..do you have more info that I can use??

Re: Low oil pressure in ZL-1
 

Remove your oil filter and look at the block. There are 2 large (3/4"?) holes. 1 large hole should have a check valve in it or you will bleed pressure like crazy. The valve is availible thru Chevy Performance Parts-Scoggin Dickey knows what it is if you tell them its for ZL-1 block.

Re: Low oil pressure in ZL-1
 

thats got to be it!!..never put one in!!!

Re: Low oil pressure in ZL-1
 

The relief valve part number is 25013759. This is the set-up on all ZL-1's. I would have to remove my oil filter to see which hole I put it in as I don't remember.

Re: Low oil pressure in ZL-1
 

Check it, and if you don't have one in the block let us know.

Re: Low oil pressure in ZL-1
 

I know I did not put one in..Ill verify it in the AM and order that piece..many thanks!!

ALbert

Re: Low oil pressure in ZL-1
 

Wow, this is better than any soap opera or game show. It actually has a happy ending (crossing my fingers at the moment). Alss, update us as soon as you know.
https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: Low oil pressure in ZL-1
 

Sounds Like sound advise to me from 69ss ZL1... Lets check it out tomorrow.. Sounds like what is going on!!!! All the problems indicate the facts at hand... And lets go from there....