77_MG_Midget
Jedi Trainee
Offline
Took my 1500 midget for a drive last night. Still 81 degrees at 9pm... nice driving weather!!! Anyway, after about 5 miles, I noticed the oil pressure wasn't quite what I thought it should be.
Cold, it's 70 psi at 3000 rpm, 20 psi at idle. But after the engine warms up good, it drops to 45 psi at 3000 rpm and 12-15 psi at idle.
Engine temp is good at 160-165. The engine is fresh, only 25 miles on it so far after the rebuild. During the rebuild, I put in a new oil pump and pressure relief spring.
The workshop manual says the oil pressure should be 40-70 at "running speed" (which it doesn't define running speed, so is it 40, 50, 60 mph???) and 20 at idle. So, this made me a bit concerned as mine is lower at idle when hot.
Is this normal? I was reading an old thread about making an adjustable oil pressure relief valve. Would this be worthwhile?
Advice is much appreciated!!!!
Cold, it's 70 psi at 3000 rpm, 20 psi at idle. But after the engine warms up good, it drops to 45 psi at 3000 rpm and 12-15 psi at idle.
Engine temp is good at 160-165. The engine is fresh, only 25 miles on it so far after the rebuild. During the rebuild, I put in a new oil pump and pressure relief spring.
The workshop manual says the oil pressure should be 40-70 at "running speed" (which it doesn't define running speed, so is it 40, 50, 60 mph???) and 20 at idle. So, this made me a bit concerned as mine is lower at idle when hot.
Is this normal? I was reading an old thread about making an adjustable oil pressure relief valve. Would this be worthwhile?
Advice is much appreciated!!!!