[Healeys] Bn2 excessive oil pressure

[Bob Spidell]

Jose, 

Regardless of the filter, the oil pressure relief valve should limit the pressure to a maximum of (typically) 60-70psi. 

30psi @ 1,000rpm is great, but 90 @ 4,000 seems too high; the obvious culprit would be the valve, but I can't explain how just changing the oil and filter would instigate the problem (unless, maybe, you went from 20W break-in oil to straight 60W). Definitely check the valve for burrs, etc.; maybe try a different spring. 

Sounds like your rebuild was good--most issues are with too low pressure--but too high puts undue stress on the cam/distributor gear and seals. 

Bob 

-------------------------------- 
Bob Spidell - San Jose, CA 



After the engine rebuilt I had normal oil pressure 20-30 at 1000 rpm and 40-50 
At 4000 rpm. 
Using the spin oil filter adapter from moss and the cheap fram spin on oil 
filter (moss # 235-880) 
After an oil and filter change this week I get 30 at 1000 rpm and 90 at 4000 
rpm and 100 at 5000 rpm. I changed the oil spin on filter to the K&N (moss # 
235-830). 
Any ideas, 

Jose