Swearbody
Full Access Member
- Joined
- Nov 4, 2018
- Posts
- 701
- Reaction score
- 716
- Location
- Birmingham AL
- First Name
- Jeff
- Truck Year
- 84
- Truck Model
- C1500
- Engine Size
- 355 sbc
Is your pressure relief valve opening at a normal oil pressure? If your pressure is super high, you could have excessive oil delivered to the rockers, which could cause the problem you are having. Another possibility is broken rings on one or two pistons, or all the end gaps aligned with each other instead of staggered. Lastly, if you are using dirt-cheap motor oil, it can foam at high RPM and blow out the breather.
I suppose it is possible that the oil pump pressure relief valve could somehow get clogged and cause oil pressure to increase but NO, mine is fine. Oil pressure has never risen over 60-65ish and thats when cold or warmed and in throttle. Otherwise idling warm its 35-40ish