- Joined
- Aug 4, 2021
- Messages
- 126
Hello good people of bobistheoilguy.
I have a 1999 Sierra 1500 4x4 that had a 4.3 vortec. I put in a 4.3 from a 2003 Silverado 1500 and the engine has been a dream in my gutted Sierra that I use to hit a few dirt and mud trails. It use to have what I think was okay oil pressure. Cold start 40psi. Warm idle exactly 20. And 45 when cruising. Then suddenly I saw the gauge bobbing around 10 at idle. I thought the mechanical gauge might be messed up since I dropped it so I put another. And the same thing. I changed the oil feeling dumb I didn’t realize it’s actually been a while and after cold start was 45 warm idle 25 and cruising 50 to 45. But as soon as I got off the freeway. It was bobbing 12-16psi. But as soon I touch the gas shoots to 35-40. No engine noise and is running great. Could it be the oil pump or pick up tube? Someone told me that might be pointless to try and do and that I should just get the engine overhauled. Any help or opinions would be greatly appreciated. Should I just Drive it until it’s done done??
I have a 1999 Sierra 1500 4x4 that had a 4.3 vortec. I put in a 4.3 from a 2003 Silverado 1500 and the engine has been a dream in my gutted Sierra that I use to hit a few dirt and mud trails. It use to have what I think was okay oil pressure. Cold start 40psi. Warm idle exactly 20. And 45 when cruising. Then suddenly I saw the gauge bobbing around 10 at idle. I thought the mechanical gauge might be messed up since I dropped it so I put another. And the same thing. I changed the oil feeling dumb I didn’t realize it’s actually been a while and after cold start was 45 warm idle 25 and cruising 50 to 45. But as soon as I got off the freeway. It was bobbing 12-16psi. But as soon I touch the gas shoots to 35-40. No engine noise and is running great. Could it be the oil pump or pick up tube? Someone told me that might be pointless to try and do and that I should just get the engine overhauled. Any help or opinions would be greatly appreciated. Should I just Drive it until it’s done done??