batmanntexas

iTrader: (1)

Hello everybody. I have spent hours researching and reading forum postings on oil pressure issues, but I am still having issues.

The motor in question is in a 2007 Avalanche. The dash gauge indicates about 22-25psi cold at idle, and about 5-10psi warm, at idle. At 1500-2000 rpm it shows about 18-20psi, again warm engine.

Using a mechanical gauge, I took two measurements:

The front left side of the block at the oil galley plug: 60 psi cold
The back of the block, on top where the pressure sending unit is: 20-25 psi cold.

I have changed the oil filter, oil pan gasket, valley cover gasket, pressure relief valve in the oil pan, and have had the main bearing clearances re-checked. The last item done was to replace the oil pressure relief valve in the oil pan, at which time I replaced the pan gasket also.

I'm leaning towards a wiped cam bearing (or several), but I have no way of verifying without pulling and disassembling this motor....again.

Just looking for advice/sanity check.

Thanks,
Scott

Che70velle

iTrader: (6)

If you have a bearing going south, your oil filter will let you know. Buy an oil filter cutting tool ($42ish from summit) and inspect. I use the tool to inspect every filter I change, just for peace of mind. It’s worth the purchase.

brandon6.0

iTrader: (32)

remove the oil pressure sensor and pull the small filter out inside the valley cover. Its right below the oil psi sensor. throw the filter away or replace it and thin see what u get for pressure. Its a common problem on tht platform.