Jammin'Trey
10+ Year Contributor
- 74
- 0
- Jun 11, 2009
-
Omaha,
Nebraska
Hey guys, I have a 1999 eclipse gsx, ever since I got the car I have never been able to have good results doing boost leak tests. I can't get the car to hold any boost for any period of time, as soon as I release the pressure to the system it leaks out. I have eliminated all the leaks in the inter cooler piping and throttle body. I consistently get a leak coming from the valve cover breather. To my knowledge there is 3 main ways that boost enters the crank case, 1. bad rings, 2. bad turbo seals, 3. bad valve stem seals.
Today I did a compression test, cam up with 175 across the board, this was a dry test, then I put a tablespoon of oil in each cylinder and retested, I got 175 across the board again..... I believe this eliminates bad ring seal
test 2, I did a boost test at the throttle body elbow, results came up the same as always, still leaking boost out of the valve cover, I believe this eliminates bad turbo seals (turbo never pushes out any oil into my intake or exhaust as well)
test 3, I put the engine at TDC, center two cylinders, I did the boost leak test pre and post turbo, same results, boost escapes out of the valve cover.
The only test I haven't done is a leakdown test, I dont own a leak down tester, and to buy one that is accurate is a lot of money.
Any input? I am at a lost, I can hear oil gurgle when I do the BL test from the throttle body, but not from the turbo? Thanks a lot in advance, hopefully I can get this figured out.
Today I did a compression test, cam up with 175 across the board, this was a dry test, then I put a tablespoon of oil in each cylinder and retested, I got 175 across the board again..... I believe this eliminates bad ring seal
test 2, I did a boost test at the throttle body elbow, results came up the same as always, still leaking boost out of the valve cover, I believe this eliminates bad turbo seals (turbo never pushes out any oil into my intake or exhaust as well)
test 3, I put the engine at TDC, center two cylinders, I did the boost leak test pre and post turbo, same results, boost escapes out of the valve cover.
The only test I haven't done is a leakdown test, I dont own a leak down tester, and to buy one that is accurate is a lot of money.
Any input? I am at a lost, I can hear oil gurgle when I do the BL test from the throttle body, but not from the turbo? Thanks a lot in advance, hopefully I can get this figured out.
