220K miles. Oil and coolant always good. The engine makes a noise which I can only describe as sounding like a collapsed hydraulic lifter ( even though this engine does not have hyd lifters) . I changed oil and filter immediately, but sound still there...
Tried to isolate with stethoscope and seems louder on upper front bank in the middle of valve cover ( not where VCT solenoid is).
I thought maybe LOW oil pressure so I installed a manual gauge in the oil pressure switch port and was very surprised by the high reading. Honestly i will not run the engine long enough to get up to Normal Op Temp as I am thinking it may do more damage.
I am close to diving into the front cover but don't want to miss anything much simpler as that looks to be a very complex job.
Thanks much for your reply.