RootesRooter
Donation Time
I would get rid of that PRV just to avoid the 80+ psi on startup. Sounds like a good way to blow a filter base gasket.
Welcome to the new SAOCA website. Already a member? Simply click Log In/Sign Up up and to the right and use your same username and password from the old site. If you've forgotten your password, please send an email to membership@sunbeamalpine.org for assistance.
If you're new here, click Log In/Sign Up and enter your information. We'll approve your account as quickly as possible, typically in about 24 hours. If it takes longer, you were probably caught in our spam/scam filter.
Enjoy.
I have seen an OPRV mod that is thought to be a PRESSURE adjustment but it is NOT.
This mod uses a small diameter machine screw to be installed in the center of the head of the OPRV.
What it does is JUST limit the TRAVEL of the OPRV piston.
It does NOT change the PRESSURE of the OPRV piston SPRING.
An OPRV with this adjustable piston travel LIMIT could cause the problems seen.
What is the diameter of the bolt used for the OPRV mod?
...I am convinced that the PRV problems I had were due to tiny amount of grit flowing through my oil. I think I like Kevin's idea to epoxy paint the inside of the block when rebuilding an engine....