How would a hung open oil pressure relief valve manifest itself? (technical)

[Jack E/NJ]

Good to know, Ol' Ron. I guess that's why Ford now recommends their 5/20 synblend. My 21-studder seems happy with it. 8^)

Jack E/NJ

[Bassman/NZ]

Woah! 20-50 is bad? What gives?

[Ol' Ron]

When these engines were designed, they recommend 30 in the summer and 10 in the winter. The onlu teason to run 20/50 is to make the oil pressure gauge happy. It rund hotter and takes more power to run the pump and that my friend is hard on the oil pump drive gear on the old cams. How do I know this?? I spun one.

[G.M.]

Originally Posted by phartman

No really sure. It is a '36 LB block. Which one would that have???

I just assumed it had the bypass valve in it.

If a latter oil pump with the bypass is installed that could be leaking. I have seen several that needed a large spacer on the spring. Look in back posts, I have describe several times how to test and adjust the pumps. G.M.

[Lawrie]

Ron, its an easy job to mill a small flat on the cam to fit on the gear with the flat ,,Well if the engine is in bits its easy. Thats what I did.
Lawrie