stutaeng
I'm Awesome
Hi guys, I need some help on a 99 Silverado with the 4.3. Over the winter I had noticed my oil pressure gauge on the dash was lower than normal. It is summer now and reading zero at idle when it's hot outside (100F, Dallas, TX)
I hooked a mechanical gauge and it reads 6 psi at idle. There seems to no be a spec for idle pressure?
I compared to Haynes manual at this is what I got:
1000 RPM - 11 psi
2000 RPM - 27 psi
4000 RPM - 40 psi
I have already replaced the oil pressure sender unit because the socket I bought for was machined wrong and I accidentally broke it trying to remove it.
The truck has 250,000 miles and I've been running 5W-30 or 10W-30. I bought it with 87,000 miles and have mostly changed the oil when the light comes on. I just hear a small ticking, but no knocking. Seems like bearings are loose from wear and tear and was thinking to switch to 10W-40 or thicker.
Back in February I did the intake manifold gasket and didn't change the oil right away. I covered the top of the engine with a plastic bag, but don't know if something got in there, or maybe it is just coincidence. I did see a residue on the oil plug the next time I changed the oil. Also, I have saved the oil filters since then, but have not opened them up.
Any advice is welcomed...
I hooked a mechanical gauge and it reads 6 psi at idle. There seems to no be a spec for idle pressure?
I compared to Haynes manual at this is what I got:
1000 RPM - 11 psi
2000 RPM - 27 psi
4000 RPM - 40 psi
I have already replaced the oil pressure sender unit because the socket I bought for was machined wrong and I accidentally broke it trying to remove it.
The truck has 250,000 miles and I've been running 5W-30 or 10W-30. I bought it with 87,000 miles and have mostly changed the oil when the light comes on. I just hear a small ticking, but no knocking. Seems like bearings are loose from wear and tear and was thinking to switch to 10W-40 or thicker.
Back in February I did the intake manifold gasket and didn't change the oil right away. I covered the top of the engine with a plastic bag, but don't know if something got in there, or maybe it is just coincidence. I did see a residue on the oil plug the next time I changed the oil. Also, I have saved the oil filters since then, but have not opened them up.
Any advice is welcomed...