pjigar wrote:
Resurrecting an old thread. I know the play is the sure way to test turbo going out but is there any continuous way to track turbo health? I am going to put a boost gauge to monitor turbo health. What should I be monitoring?
When people way failed turbo kill engine, what kind of damage are we talking about? Debris going into intake or engine oil starvation? I it is debris then I am thinking of putting some sort of screen int he intake path, would that help?
I have invested a lot of time and money making this motor rock solid. I don't want a failing turbo killing my motor.
There are several scenarios with turbo going bad. It starts with radial play (up-down-left-right), then it develops axial play (front-rear). Then when the play is getting worse, the "bearings" which in out turbo is made by brass sleeves with some tiny holes on the sides to allow oil to go through will eventually damage the oil seals and oil can go in 2 directions, depending on where is the biggest wear:
- will leak oil to the turbo pressure hose, towards the intercooler. This can result in an intercooler full with oil in a short time, followed by a runaway diesel engine. I have never heard anybody with crd with a runaway diesel.
- will leak towards the exhaust side of the turbo, depleting your oil in a very short time and seizing the engine.
Boost is an ok indicator, but having good good boost won't mean turbo is as good as new. Best thing is to periodically check the axial and radial play and install an egt gauge, perform proper turbo cool down. I turn off my engine when egt (measured pre turbo) drops below 300. So proper care is the best way to take care of your turbo.