oil psi
- Thread starter Myhyryd
- Start date
Robert Kenney
Super Moderator
Before making any decisions get a couple of thousand miles on it. Seat the rings real good and then see if you are still unhappy.
As robertc reiterated and I noted the start up puff is normal.
Get a mechanical oil pressure gauge on the engine , even if only for test purposes and see what you are really getting for pressure.
As robertc reiterated and I noted the start up puff is normal.
Get a mechanical oil pressure gauge on the engine , even if only for test purposes and see what you are really getting for pressure.
Robert Kenney
Super Moderator
What rpm are you seeing 30# if it is at 2000+ then it is low. Lots of things will cause low high end oil pressures.
If you have a mech gauge, get a second opinion (another gauge and stick it in one of the 1/8 npt ports on the block right above the pan rail).
Sorry if you already posted this but who rebuilt the engine? What was done?
Remove the oil filter and cut the top off of it. Inspect the can and element for signs of bearing failure. This would be a lot of non- magnetic silver/copper particles. Non of these?
A few causes for low oil pressure are.
Bearing clearances larger then spec, main, rod, cam.
Oil pump gear to gear clearances big.
Oil pump gear to housing clearances big.
Oil pump gear to cover end clearances big.
Oil pump relief valve not set up correctly.
Oil pickup tube to pump oring incorrectly sized/installed.
Poor oil viscosity (40 wt on the big number will help)
poor oil filter flow some good makers of filters have been mentioned.
Low oil level.
Internal oil gallery plugs missing.
If you have a mech gauge, get a second opinion (another gauge and stick it in one of the 1/8 npt ports on the block right above the pan rail).
Sorry if you already posted this but who rebuilt the engine? What was done?
Remove the oil filter and cut the top off of it. Inspect the can and element for signs of bearing failure. This would be a lot of non- magnetic silver/copper particles. Non of these?
A few causes for low oil pressure are.
Bearing clearances larger then spec, main, rod, cam.
Oil pump gear to gear clearances big.
Oil pump gear to housing clearances big.
Oil pump gear to cover end clearances big.
Oil pump relief valve not set up correctly.
Oil pickup tube to pump oring incorrectly sized/installed.
Poor oil viscosity (40 wt on the big number will help)
poor oil filter flow some good makers of filters have been mentioned.
Low oil level.
Internal oil gallery plugs missing.
Myhyryd
Member
I do not know who did it or what was done. The po said he bought a rebuilt long block and put used heads on it and couldn't get it running. But in the back. Was a few extra parts including a melling oil pump rebuild kit with some used gears in it. So I'm assuming the oil pump got rebuilt. Ill get rid of the fram oil filter and run some 20-50 and get a new gauge and see how my numbers look and go from there. I noticed there is a small leak at the fitting for the gauge on the block above the pan so when I replace the gauge I will fix that leak as well.