Hi Gentlemen,
This is my first post
I know low oil pressure threads are alot, i read so many, but my issue is a bit different and needed your experience. This why i
So i got a 2011 tahoe 5.3 running 160k miles using Motorcraft 5w-30 fully synthetic (a goot option where i live) chaning it every 5k miles.
- had low pressure at around 20 when worm and idle. Replaced the oil pan o-ring no avail, moved on and changed the oil pump with high volume type. Pressure was so much improved.Got 30-35 on idle and worm. 40-42 idle and cold. No issues no ticking sound, nothing. Was very happy with it drove it for a couple of months it was great.
- Ran 5k more miles on the new pump, then one morning, heading to work, engine had bad lifters sound, getting worse every mile. Immediatley took it to a shop.
They advise to change the lifters and cam and oil pan o-ring, since oil pressure was ok and the pump was new, mechanic didnt change it. Cost me alot hoping this will be the end of it.
Engine after cam/lifters replacement was running good. Recieved it from the shop without issues.
Week by week, now after two months since the lifters replacemebt, low oil pressure is back at it getting worse abd worse.
When cold its at 40, with higher RPMs 1500-2000 when cold it reaches 50. (Looking great)
But what is killing is when it gets worm after a long drive, it drops to to 19-20 at idle with same oil visocsity 5-W30.
What is hurting my brain is that the pump output changed at idle and worm, from 30-35 before the re-build, to 19-20 after it, and with running only for 5k miles.
Tried getting the car on a slope to check the o-ring, no change. Oil reading are a bit realistic so im not suspecting the sensor or its screen. Changed oil again with new filter full synth no improvement at all.
Appreciate your support gents
Thanks in advance
-
This is my first post
I know low oil pressure threads are alot, i read so many, but my issue is a bit different and needed your experience. This why i
So i got a 2011 tahoe 5.3 running 160k miles using Motorcraft 5w-30 fully synthetic (a goot option where i live) chaning it every 5k miles.
- had low pressure at around 20 when worm and idle. Replaced the oil pan o-ring no avail, moved on and changed the oil pump with high volume type. Pressure was so much improved.Got 30-35 on idle and worm. 40-42 idle and cold. No issues no ticking sound, nothing. Was very happy with it drove it for a couple of months it was great.
- Ran 5k more miles on the new pump, then one morning, heading to work, engine had bad lifters sound, getting worse every mile. Immediatley took it to a shop.
They advise to change the lifters and cam and oil pan o-ring, since oil pressure was ok and the pump was new, mechanic didnt change it. Cost me alot hoping this will be the end of it.
Engine after cam/lifters replacement was running good. Recieved it from the shop without issues.
Week by week, now after two months since the lifters replacemebt, low oil pressure is back at it getting worse abd worse.
When cold its at 40, with higher RPMs 1500-2000 when cold it reaches 50. (Looking great)
But what is killing is when it gets worm after a long drive, it drops to to 19-20 at idle with same oil visocsity 5-W30.
What is hurting my brain is that the pump output changed at idle and worm, from 30-35 before the re-build, to 19-20 after it, and with running only for 5k miles.
Tried getting the car on a slope to check the o-ring, no change. Oil reading are a bit realistic so im not suspecting the sensor or its screen. Changed oil again with new filter full synth no improvement at all.
Appreciate your support gents
Thanks in advance
-
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