oil psi??
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
i was reading the replys and went in the shop i started the car let it run at idle for about 10 min .got in the car hit the gas and the oil psi went up and was back to 60 psi at about 3000 rpm dont know what changed but its back. when i rev the motor the oil press follows. could it be their was air in the line going to the gauge??
Air in the line doesn't stop the gauge from working.
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
i was reading the replys and went in the shop i started the car let it run at idle for about 10 min .got in the car hit the gas and the oil psi went up and was back to 60 psi at about 3000 rpm dont know what changed but its back. when i rev the motor the oil press follows. could it be their was air in the line going to the gauge??
Cold oil will always have higher pressure than hot.
The inconsistancy you mentioned before may be from the relief sticking. You mentioned that the pickup was welded to the pump. The relif vslve snf spring should be removed when that is done so as not to cause a sticky valve.
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
I have been using Mobil1 10w40 in my trailer rig.
The other day I decided to try Mobil1 5w30.
After several hot/cool cycles and about 60 highway miles, I am getting consistent results.
Oil pressure is higher and the engine runs at a higher temp.
I would have thought that the pressure would be lower and the temp the same or slightly cooler.
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
i was reading the replys and went in the shop i started the car let it run at idle for about 10 min .got in the car hit the gas and the oil psi went up and was back to 60 psi at about 3000 rpm dont know what changed but its back. when i rev the motor the oil press follows. could it be their was air in the line going to the gauge??
Thread Starter
Instructor
Joined: Dec 2007
Posts: 246
Likes: 2
From: colonia New jeresy
i took the pump apart when welded the pickup.my readings were hot. now the psi is the way it was 60 at 3000 rpm. the psi follows the rpm . at idle its 25 psi as soon as i hit the gas it goes up and the comes back down with rpm to idle.dont know what changed.i didnt change the oil so i dont know
