2000 S-10 4.3
A few weeks ago I noticed my oil pressure was really high when I first start my truck. I mean like the gauge was up to 80psi. The more the engine warms up the lower the oil pressure gets until it finally settles around 40psi (middle if the gauge) Under load it would go up slightly but then back down at idle. Last week I started my truck up and the oil pressure gauge was on zero. I immediately shut it off. Checked the oil and it was slightly lower than usual but still within the hash marks on the dipstick. I looked underneath and saw a puddle of oil. I tracked it down to the oil pressure sensor/switch behind the distributor. After changing the oil pressure switch and topping off the oil I then had oil pressure on startup but it was high like it was before. Tonight coming home from work the oil pressure dropped to below 30psi on the gauge and I could smell oil burning. The oil was again coming out of the oil pressure switch and dripping onto the Y-pipe and burning. Could a bad oil pump cause the oil pressure to be so high that it cracks the plastic oil pressure switch? Anyone ever have an issue like this? I can't seeem to find anything online about it.