What is wrong with this turbo?
#1
What is wrong with this turbo?
Hey
I'm in the last steps or rebuilding a 1.6 turbo. Forged pistons, new damn near everything. I got the car fired and heat cycled yesterday, but the turbo was smoking a little, I figured no biggie since I'd spilled a little oil on it filling the engine. Got the car up to 180deg. Then shut down to check for leaks. This is my 2nd attempt at the feat, first time revealed several issue that are now solved. Anyway shut it down and got a puddle of oil indee the car. Investigated and it appears the turbo was leaking in a big way. There is no shaft play but I'd say that's oil! The turbo I believe has a restrictor in the feed line, I'll confirm that shortly. Wondering if there's what the next step may be. Is this a fixable problem or do I need a new turbo? It's a Garett 25--I'm drawing a blank.....maybe 60. The leak appears to be coming from the ring that connects the hot side to the center section. I'm not very knowledgeable on turbo anatomy.
I'm in the last steps or rebuilding a 1.6 turbo. Forged pistons, new damn near everything. I got the car fired and heat cycled yesterday, but the turbo was smoking a little, I figured no biggie since I'd spilled a little oil on it filling the engine. Got the car up to 180deg. Then shut down to check for leaks. This is my 2nd attempt at the feat, first time revealed several issue that are now solved. Anyway shut it down and got a puddle of oil indee the car. Investigated and it appears the turbo was leaking in a big way. There is no shaft play but I'd say that's oil! The turbo I believe has a restrictor in the feed line, I'll confirm that shortly. Wondering if there's what the next step may be. Is this a fixable problem or do I need a new turbo? It's a Garett 25--I'm drawing a blank.....maybe 60. The leak appears to be coming from the ring that connects the hot side to the center section. I'm not very knowledgeable on turbo anatomy.
#8
SADFab Destructive Testing Engineer
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Those bolts would not cause a leak like that. So the oil is coming from elsewhere. Check the drain flange first.
Although those bolts being loose can cause your turbo to separate and break. So yes they should be quite tight, but not stripped.
Although those bolts being loose can cause your turbo to separate and break. So yes they should be quite tight, but not stripped.
#13
Was able to tighten the left Allen bolt on the drain line 1/4 turn the bolts on the housing- some I got almost a full 360 turn on with the wrench. 2 left then I'll see how it goes. Cleaning off the old oil I'm using brake clean and a wire brush so hopefully I can pin point the source if it persists.
#19
Is there supposed to be a gasket between the turbo and that fitting? Can I disassemble and just use some permatex gasket maker?
As the motor warmed up it was fine until about 160deg. Then I started to get some white smoke from the tail pipe then smoke from the turbo, im assuming as the oil leaked out into the hot side.
As the motor warmed up it was fine until about 160deg. Then I started to get some white smoke from the tail pipe then smoke from the turbo, im assuming as the oil leaked out into the hot side.
#20
I can't tell from the photos -- do you think it's leaking from between the hose and the hose end, hose end and fitting, or fitting and CHRA? None of those locations will put oil in the hot side, though.
You need a gasket between the fitting and the CHRA, but not in the other two locations.
--Ian
You need a gasket between the fitting and the CHRA, but not in the other two locations.
--Ian