My 351w has good oil pressure when cool but once at operating temp the factory oil gage in the dash drops to the low side, accelerate and it goes up til i let off. Is there any thing i should worry bout cause its not making and of the sound an engine makes with little or no oil pressure?
Probably the main bearings getting wore out.. When the engine gets warm it expands a little which is why the pressure drops..
only 9k miles on it, fresh oil, changed the oil pump strainer. runs fine thinking on putting an after market gage on it and see what it does.
not a mechanic or anything, but maybe check the oil pressure sending unit...had a customer the other day with an 05 CTS-v and it was doing the same thing and he claimed that fixed it
say the factory gauge should be attached to the sending unit and it can just end up being the gauge freaking
I've seen people put a T-fitting on older engines at the sending unit port and have a mechanical gauge as well as the electrical sending unit.
if i were you id run a T and get a cheap mechanical oil pressure gauge and also install your new sending unit. You might as well do it once since your gonna be in there anyways. those older trucks like that i like to think of the stock gauges as ballpark gauges, theyre never going to be as accurate as an aftermarket gauge btw, welcome man!!