Re: Need 526 oil pressure/rpm values....

Posted by Bob Supina On 2022/6/19 11:32:06

I noticed that my pressure was pegging at 50 on the dash. I was running 30 oil. I then installed a gauge at the back of the engine, thinking the dash gauge might be defective. It was reading 57+-.
I changed the oil to 0W-20 and back off the relief valve a turn and now with the head temp at 160, the engine idles at 18+-, but still goes over 50 at high rpm.
My question is :is this indicative of a blocked passage?
I have a tachometer, so I can test the rpm. That's why I wondered what rpm is indicative of 40 mph.
What's the downside of high psi?