Great…..
New to us Jeep fires up and runs fine. When cold, she purrs away quietly and sits at about 50psi on oil pressure.
After a few minutes of running and starts to come up to temp, a knock becomes audible. Louder as rpm’s increase. But quiet at idle. Oil pressure drops off and with a hot engine will read 0 at idle and about 20-30psi up around 2-3k.
It doesn’t knock at idle, so I’m wondering if the advance isn’t working and I’m detonating? I would think rod knock would happen all the time. I haven’t pulled the valve cover yet to check valve lash and rods. Other ideas??
