Squeaking Sound Coming from 225 /6

pishta said
I bled mine from the inside by cracking the nut to get the air out. At 22 psi idle, I barely got a dribble out of the 1/8 OD line? The pressure popped right up on the gauge once I cinched it down but there was no oil jet squirting? Maybe I had a kink somewhere....They sell firewall isolators, mandatory for mechanical fuel pressure gauges. Just a 2 opposite ports manifold with a diaphragm in the middle and light oil running to the gauge. The fuel pressure pushes on the diaphragm transferring the pressure to the harmless fluid to the gauge in the cab..

I have never bled an engine oil pressure gauge,, bled hydraulic brakes yes, the pressure in a hydraulic brake line is 0 to maybe 1000 psi, the compressibility of trapped air will make a difference in system effectiveness. The pressure in a mechanical engine oil pressure line is maybe 0 to 70 psi,, you will not see the impact of trapped air. Other than bubbles in the plastic line,,, if that bothers you,, bled the bubbles out, but that will not affect the gauge.