Need Tech guidance
Hey guys got a really good one here:
I had to have a valve job on a 1989 2.3L with 180,000 miles because of two burnt valves.
When I tore it down to have the valves down, I removed the cam and the lifters, but left the valves for them to remove for the valve job.
After putting the head and all back togather,the oil pressure at an idle is 10 psi at operating temp. When the rpm is taken up to 2000 and held ,the pressure DROPS to about 3-4 psi,pressures are taken with a manual gauge at the sending unit port.
There is no audible knock or noise from the head or low end. I changed the oil when I had the head off and thought on an extreme chance of a bad oil filter or such. Put a different one on and the same result.
Any ideas or help would be greatly appreciated.