i have a 1980 RHD HJ45 with a 1H engine. I just got it and changed the oil, it had been running high before but after changing it went past the High mark. Any ideas whats happening?
Oil Pressure super high after oil change (1 Viewer)
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@cantfindanythin
Couple thoughts. Was it possibly a significantly higher viscosity oil than the previous oil? Is the engine high mileage or recently rebuilt? (I only ask because if it is a fresh tight engine, it will obviously run higher pressure).
Possibly a stuck oil bypass in the pump?
Did you happen to run anything else through the crank case prior to the oil change? I had something similar happen to me on my '78 2F. I ran seafoam in the crank case in a foolish attempt to 'flush' the engine. I believe that it broke some sludge free which then clogged the oil passage to the head.
Does the oil pressure drop after warming up?
Couple thoughts. Was it possibly a significantly higher viscosity oil than the previous oil? Is the engine high mileage or recently rebuilt? (I only ask because if it is a fresh tight engine, it will obviously run higher pressure).
Possibly a stuck oil bypass in the pump?
Did you happen to run anything else through the crank case prior to the oil change? I had something similar happen to me on my '78 2F. I ran seafoam in the crank case in a foolish attempt to 'flush' the engine. I believe that it broke some sludge free which then clogged the oil passage to the head.
Does the oil pressure drop after warming up?
- Thread starter
- #4
it was rebuilt a couple years ago. i put 5w-40 rotella in it. the engine after being rebuilt has most likely 10k on it. and i haven’t run anything though it. i just talked to some people and they think it’s the viscosity of it
