5.3 oil pressure, what's acceptable
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5.3 oil pressure, what's acceptable
Ok, so I've looked for answers all over the interwebs and haven't turn much on what's acceptable for top pressure. I recently just did a swap on an 05 tahoe 5.3. Engine that went in was from an 04 suburban 5.3 13x,xxx miles. Runs and drives fine, gauges seemed to be in working order before swap. However after swap oil pressure is cold start about 50psi, warm idle 40 which I like. My issue is moderate throttle about 2k I have 60psi and wot is 80psi. I switched sending units and it reads the same. I haven't gotten a mechanical gauge on there yet. The one I have doesn't have the right fitting. So that will be my next move to verify it's the correct reading. I can't find anyone talking about pressure relief valve sticking shut causing pressure to bleed off. I only find people talking about it sticking open and causing low/no pressure. Does anyone have experience with this issue or any input. I know it has a higher pressure pump for the afm, but I don't know what's acceptable top pressure without causing starvation, aeration, blowing a seal or anything else bad. To worry or not to worry is the question(in a nut shell).