Idriveaho
Full Access Member
- Joined
- Jul 13, 2019
- Posts
- 139
- Reaction score
- 185
2008 Hoe 5.3 flex fuel
Background of issue at hand. Over a month ago it was time to change oil. After changing I found metal flakes coming out of the filter. I had changed to the super tech 5w30 full synthetic high mileage and used the ac delco filter. Normally I was using pennzoil with the same filter but they didn’t have any in stock. After changing I noticed pressure being lower than normal. 2 weeks ago it got so low after being warmed up at idle the light chimes on to stop engine. No noises, engine runs smooth. I decided to change the oil pressure sensor and nothing changed. Used oem part for that.
After the sensor change the pressure was getting worse to where at stops I would have to give it a little gas to keep pressure up from chiming. While cruising at highway speeds it gets 30 psi on up. I decided to park it during my work week and take the back up vehicle while getting parts ready for oil pump and pickup tube. 2 weekends later and wishing I would of rented the correct tools ahead of time (balancer puller and installer, better impact….) I got the pump changed out. Went with the melling high volume that came with the pickup tube. Also last minute since I had the pan off, change the pressure relief valve in it. Ordered melling for that and they just repacked a gm original in it. Used ac delco filter again but this time had pennzoil high mileage full synthetic and upped to 10w30. Fired it up and still had lower pressure than it should. This time it was higher than before.
Today while driving to work hitting 35 to 40 psi on the interstate. Cold pressure at start was 20. But as soon as I get off the exit and at a stop the chime went off again and it’s back to like I didn’t just do all this work to it. I borrowed a scanner and couldn’t find the option to look at live data for oil pressure. Guy I work with had his scanner with him, he tried and same deal. Luckily when I replaced the sensor I left the back sound deadner on the intake off so I could access better. I will get a t fitting and get a pressure gauge and see if it’s truly low or not.
I’m thinking maybe trying a different oil filter. Maybe the motor in the gauge is bad. Forgot to mention I took the old pump apart and there was some light scoring in it.
Background of issue at hand. Over a month ago it was time to change oil. After changing I found metal flakes coming out of the filter. I had changed to the super tech 5w30 full synthetic high mileage and used the ac delco filter. Normally I was using pennzoil with the same filter but they didn’t have any in stock. After changing I noticed pressure being lower than normal. 2 weeks ago it got so low after being warmed up at idle the light chimes on to stop engine. No noises, engine runs smooth. I decided to change the oil pressure sensor and nothing changed. Used oem part for that.
After the sensor change the pressure was getting worse to where at stops I would have to give it a little gas to keep pressure up from chiming. While cruising at highway speeds it gets 30 psi on up. I decided to park it during my work week and take the back up vehicle while getting parts ready for oil pump and pickup tube. 2 weekends later and wishing I would of rented the correct tools ahead of time (balancer puller and installer, better impact….) I got the pump changed out. Went with the melling high volume that came with the pickup tube. Also last minute since I had the pan off, change the pressure relief valve in it. Ordered melling for that and they just repacked a gm original in it. Used ac delco filter again but this time had pennzoil high mileage full synthetic and upped to 10w30. Fired it up and still had lower pressure than it should. This time it was higher than before.
Today while driving to work hitting 35 to 40 psi on the interstate. Cold pressure at start was 20. But as soon as I get off the exit and at a stop the chime went off again and it’s back to like I didn’t just do all this work to it. I borrowed a scanner and couldn’t find the option to look at live data for oil pressure. Guy I work with had his scanner with him, he tried and same deal. Luckily when I replaced the sensor I left the back sound deadner on the intake off so I could access better. I will get a t fitting and get a pressure gauge and see if it’s truly low or not.
I’m thinking maybe trying a different oil filter. Maybe the motor in the gauge is bad. Forgot to mention I took the old pump apart and there was some light scoring in it.
