90 PSI Oil Pressure.

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superchargeddrt

superchargeddrt

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Ok Guys,
After replacing the main seal and remote oil filter adapter o-ring I know gave 50 PSI at hot idle and 90 PSI at 5800 RPM. I have no more leaks and other than the high pressure it's running fine. Is this a problem and what do you suppose changed? I am using the same oil pump.
 
Only thing your losing is the drive energy the pump is drawing and maybe your pump drive if it's not hardened. What does it do when you rev it?
 
From my experience, doing maintenance and then experiencing a problem are usually related. The only way you’d see higher pressures at idle after maintenance is that you induced a foreign object into the oil system and it has created blockage or it’s simply a coincidence that the sending unit has failed.

You serviced the engine with the same weight oil? Different filter type? Engine was at operating temp? What were the previous pressures prior to maintenance?
 
You said the pump is new HV? I have 90 cold 70 hot
 
T56MaxTorq said:
From my experience, doing maintenance and then experiencing a problem are usually related. The only way you’d see higher pressures at idle after maintenance is that you induced a foreign object into the oil system and it has created blockage or it’s simply a coincidence that the sending unit has failed.

You serviced the engine with the same weight oil? Different filter type? Engine was at operating temp? What were the previous pressures prior to maintenance?
Click to expand...
I replaced the filter with a quality WIX filter. This is the same type and brand I took off of the engine. U gave changed the oil 3 times in 300 miles because if leaks. This is a fresh 418 stroker and I have been very careful about cleanliness. It does have a remote filter setup on it and a oil cooler. Maybe there might be an issue with the filter. I have spares, maybe I should change it.
 
the bump in pressure you are seeing comes from now having a leak free system
before, lets say 10PSI leaked out the adapter ring, and another 20 out the rear main seal

you are making the same oil pressure as before, but now there is less loss so you actually see it on the gauge, instead of on the floor
 
The seal is not connected to the pressure system; can't see how on earth that would cause any pressure drops....???

Start with a new gauge as a check. Pump relief spring on the Melling HV is 72 psi. If truly high, it is high out of the pump and that can only mean the pressure relief valve is hanging up.
  • If the filter was blocked up now, or a remote hose kinked, then there would be LESS pressure at the sensor location because the sensor is downstream from the filter area.
  • If the filter or adapter was blocking flow before and dropping pressure, and masking the fact that the relief valve was hung up all along, then you very probably would have seen lower pressures with higher RPM's before.
The relief valve being hung up would indeed be discouraging...... but it is what it is..... Was the pump dropped or tapped hard at any time?
 
diymirage said:
the bump in pressure you are seeing comes from now having a leak free system
before, lets say 10PSI leaked out the adapter ring, and another 20 out the rear main seal

you are making the same oil pressure as before, but now there is less loss so you actually see it on the gauge, instead of on the floor
Click to expand...

That's what I was thinking. Hopefully everything will be fat dumb and happy from here on out.
 
nm9stheham said:
The seal is not connected to the pressure system; can't see how on earth that would cause any pressure drops....???

Start with a new gauge as a check. Pump relief spring on the Melling HV is 72 psi. If truly high, it is high out of the pump and that can only mean the pressure relief valve is hanging up.
  • If the filter was blocked up now, or a remote hose kinked, then there would be LESS pressure at the sensor location because the sensor is downstream from the filter area.
  • If the filter or adapter was blocking flow before and dropping pressure, and masking the fact that the relief valve was hung up all along, then you very probably would have seen lower pressures with higher RPM's before.
The relief valve being hung up would indeed be discouraging...... but it is what it is..... Was the pump dropped or tapped hard at any time?
Click to expand...
No it wasn't dropped and I have been extremely careful about cleanliness. Is there a chance that the relief valve will free itself?
 
You can always blow shop air backwards towards the oil pump thru the outboard hole on the oil filter adapter and try to free up the valve.
 
Let us know in a few hundred miles if the leaks come back. I'm chasing leaks on a fresh engine (about 250 miles) I want to place the blame on oil pressure of 80+ psi cold and the same running hot. Hot is around 70 psi at idle. I feel it's causing my problems.
 
Darter6 said:
Let us know in a few hundred miles if the leaks come back. I'm chasing leaks on a fresh engine (about 250 miles) I want to place the blame on oil pressure of 80+ psi cold and the same running hot. Hot is around 70 psi at idle. I feel it's causing my problems.
Click to expand...
Where are your leaks?
 
I think it'll be fine. Run it.
 
The remote oil filter. Are you sure it's hooked up correctly. If not you dead head it and get no oil to the motor. In to out out to in. The center is the in o believ.
 
The usual, rear main, valve covers, intake, possible head gaskets. I got the car from a dead guy with a fresh engine so I can't blame anyone,builder unknown. Just seems to oooze from everywhere.
 
Let it warm up about 15 min, drive it ... heat the oil. Mine is up there till warms up, not 90 with the current, but yours could have tighter than I do.
 
Does it have a mechanical or electrical gauge? Possible line kinked to gauge? Possible remote oil filter causing increased pressure from blockage? 50 psi at idle isn’t that high but with all the leaks that have been occurring it may also be contributing to them(leaks).
 
Darter6 said:
Let us know in a few hundred miles if the leaks come back. I'm chasing leaks on a fresh engine (about 250 miles) I want to place the blame on oil pressure of 80+ psi cold and the same running hot. Hot is around 70 psi at idle. I feel it's causing my problems.
Click to expand...
I didn't have this high of pressure before I replaced the main seal and remote filter adapter o-ring. It used to be 30 at idle and 70 at 5800 RPM. At the moment I don't see any leaks but before it leaked like the Exxon Valdese. Oil made it's way all the way back to the the trunk panel .The Superformance rear main seal seems like the real deal
 
DARTGAME said:
Does it have a mechanical or electrical gauge? Possible line kinked to gauge? Possible remote oil filter causing increased pressure from blockage? 50 psi at idle isn’t that high but with all the leaks that have been occurring it may also be contributing to them(leaks).
Click to expand...
No leaks now, the Superformance rear main seal seems to be doing it's job.
 
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