turboglenn
15+ Year Contributor
- 6,375
- 123
- Nov 5, 2007
-
RIpley,
West Virginia
Just wondering if anyone who's kept a gauge on their holset for lon, that if yuou've noticed the oil passages are fairly hard to blow through and kinda slow to pass oil, Mine will hold pressure long enough with a 2.5 foot line that if you shut thecar off and get out you can get to the gauge in time to watch the pressure bleed down from about 20 to zero when it's acold start and idle ressure is 45psi or so. (gauge is under the hood behind left headlight)
I can't find any dirt/blockage or even coked on oil inthe passages to see if anything could clog it and when i rebuilt it the other day the guy at the diesle shop (s well as my own thouhgts) were that it hadn't had any oil starvation and the wear was likely from years of hard use i even had the ssembly re-balanced nad it was barely out from the get go (there was side to side play only that popped up after i got itrunning and fresh oil through it) the thrust had zero wear and i beat this turbo hard at least 3-4 times a day doing a series of 1-2 or third gear pulls at 25-27psi (still no traction in 1st and 2nd on cold days, hoping for warm weather we;re supposed to get this week -high 40's anyway)
Anyway, just want to hear from anyone who's observed an oil pressure gauge on their holset for any length of time and during shut down, I don;t think there's anything wrong with mine but would like to hear some re-assurance of something
I'm basing the flow off of how easy you can blow through a garrett or MHI. I'm also starting to think thisis part of the reason holsets have suchtight oiling specs... psi in greatly important if this tightness i'm seeing is restriction in the turbo to feed the bearings at a set rate, making excess pressure direct towards the rings easier if it's high. And my other thought on that is that the longer oil stays in a turbo the more "whipped" it becomes and turns into a frothy bubbly liquid requiring a large easy passage to flow well (that last one i know is a fact from what i learned at majestic)
I can't find any dirt/blockage or even coked on oil inthe passages to see if anything could clog it and when i rebuilt it the other day the guy at the diesle shop (s well as my own thouhgts) were that it hadn't had any oil starvation and the wear was likely from years of hard use i even had the ssembly re-balanced nad it was barely out from the get go (there was side to side play only that popped up after i got itrunning and fresh oil through it) the thrust had zero wear and i beat this turbo hard at least 3-4 times a day doing a series of 1-2 or third gear pulls at 25-27psi (still no traction in 1st and 2nd on cold days, hoping for warm weather we;re supposed to get this week -high 40's anyway)
Anyway, just want to hear from anyone who's observed an oil pressure gauge on their holset for any length of time and during shut down, I don;t think there's anything wrong with mine but would like to hear some re-assurance of something
I'm basing the flow off of how easy you can blow through a garrett or MHI. I'm also starting to think thisis part of the reason holsets have suchtight oiling specs... psi in greatly important if this tightness i'm seeing is restriction in the turbo to feed the bearings at a set rate, making excess pressure direct towards the rings easier if it's high. And my other thought on that is that the longer oil stays in a turbo the more "whipped" it becomes and turns into a frothy bubbly liquid requiring a large easy passage to flow well (that last one i know is a fact from what i learned at majestic)
