Turbo Boost Leak?????(help)
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Lead Driver
Joined: Nov 2003
Posts: 6,900
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From: Campbell River, B.C.
Turbo Boost Leak?????(help)
I have the feeling that my engine is loosing turbo boost some where. It goes as high as 5 psi very easily, but to get any more boost, I have to give lots of extra fuel, and anything over 5 psi, more smoke gets blown out the back. I can see 10 psi, but its hard to see much else.....
Having never taken apart a 6.9, Im not completely sure if the intake manifold gasket can leak in a way thats easy to detect.
Dave Sponaugle, you once montioned that you blew the valley pan on your engine from too much boost, could you prahaps shead some light on where I can look for potential boost leaks.
Is there a way to pressurise the intake to find leaks? or am I better off pulling the intake manifold?
Other than the lack of higher boost and/or clean exhaust, the truck runs very well, and all cylinders are over 400 psi, any ideals much appreciated.
Having never taken apart a 6.9, Im not completely sure if the intake manifold gasket can leak in a way thats easy to detect.
Dave Sponaugle, you once montioned that you blew the valley pan on your engine from too much boost, could you prahaps shead some light on where I can look for potential boost leaks.
Is there a way to pressurise the intake to find leaks? or am I better off pulling the intake manifold?
Other than the lack of higher boost and/or clean exhaust, the truck runs very well, and all cylinders are over 400 psi, any ideals much appreciated.
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Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
I've been thinking about this some more, and I'm wondering if a leaking intake or valley pan gasket could allow boost pressure into the crank case.
Again, having never torn into a 6.9 before, I don't know if this is possible, but oil consumption is also rather high at the moment.....
If its true, then the extra crank case pressure could be forcing more blowby through the CDR than normal, my intake usually has oil in it, and yes the CDR is cleaned often.
Am I totally off the wall here??
Again, having never torn into a 6.9 before, I don't know if this is possible, but oil consumption is also rather high at the moment.....
If its true, then the extra crank case pressure could be forcing more blowby through the CDR than normal, my intake usually has oil in it, and yes the CDR is cleaned often.
Am I totally off the wall here??
Posting Guru
Joined: Mar 2005
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From: KY
The valley pan gasket could let air in the crankcase. When you lift the intake off and take the front metal strap off on the front and unscrew the fitting in the back the pan comes right off and everything is right there. Air could easily leak in not out.
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Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
Originally Posted by catfish101
The valley pan gasket could let air in the crankcase. When you lift the intake off and take the front metal strap off on the front and unscrew the fitting in the back the pan comes right off and everything is right there. Air could easily leak in not out.
