Duramax boost leak?
I believe I have a boost leak on my truck and pressure tested the system recently up to 30PSI. Looking for any feedback on whether this looks like a boost leak or is normal engine leakdown? Seems ex...
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N-Trouble wrote:rhagfo wrote:Turtle n Peeps wrote:
I'm still trying to figure out what you're doing?
How did you block off the turbo and intake manifold to check for the leak because that's the only way I know of to check for a boost leak? :h
X2
This: https://www.youtube.com/watch?v=x5XoOe3Zjuo
There is nothing to block off. Test is done post turbo. YOur just simulating the turbo with compressed air.
Got ya.
I see what you're doing now. Kind of a weird and crude way to leak down an engine but I guess it works.
Only problem is if the EGR valve is open or leaks it will give you a false reading. It will just run from the intake through the EGR valve and out the exhaust.
Anyway, to answer your question: I don't like a new broken in engine to leak down more than 2%. A well used engine I don't like to see more than 7%.
