Looking for boost leaks
Lead Driver
Joined: Jul 2017
Posts: 6,861
Likes: 2,335
From: WV
My MAT sensor was leaking through itself. Suspect yours is doing the same. I purchased a parts store version (I know, not recommended 
) and replaced. Then epoxied the original to seal it up. It’s now in the spare parts box behind the seat. Not sure it was a “significant” leak though.
Later found a leak at the plenum. That has yet to be corrected as life has gotten in the way.
) and replaced. Then epoxied the original to seal it up. It’s now in the spare parts box behind the seat. Not sure it was a “significant” leak though. Later found a leak at the plenum. That has yet to be corrected as life has gotten in the way.
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Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
I used a little rtv black on the air delete threaded and replaced the oring the other was torn and leaking, I will leave the other part for now and order a new part, also deleting the red and green lines
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Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
My MAT sensor was leaking through itself. Suspect yours is doing the same. I purchased a parts store version (I know, not recommended ) and replaced. Then epoxied the original to seal it up. It’s now in the spare parts box behind the seat. Not sure it was a “significant” leak though.
Later found a leak at the plenum. That has yet to be corrected as life has gotten in the way.
) and replaced. Then epoxied the original to seal it up. It’s now in the spare parts box behind the seat. Not sure it was a “significant” leak though.Later found a leak at the plenum. That has yet to be corrected as life has gotten in the way.
Thread Starter
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Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
So as it stands I can pressurize the system I know the maf is leaking a little I plug the Ccv and I hear air coming out of the dipstick, push down on it I hear no other leaks!
further diagnosis is required I will elaborate after more investigation
further diagnosis is required I will elaborate after more investigation
Cargo Master
Joined: Sep 2015
Posts: 2,860
Likes: 365
you don't want to pressurize the ccv, remove the center peice that has the ccv connected to it and put your boost leak detector inside the rubber tube that leads to the turbo👍
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Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
push down on the dipstick and could hear no more air except from the maf
I figured that since you are still pressurizing the intake, you are going to get something into the block? is this not correct?!?
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Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
Noted will not do it again!
As i explained earlier i would elaborate as to why i am looking for boost leaks, I have not hooked up the laptop and forscan yet, will try to today
Been a little busy with the wife on the mend from her new knee!
When cold i have a real nice even idle, but a little down on take off throttle
when warmed up i can hear/feel the idle is not smooth , no miss but not smooth
Also as i accelerate i can feel say about 3rd gear the turbo sound changes like it just vented off boost, I tried to get a video of it but you really can't hear it, but i can feel it
I will use forscan to run through what i am describing, cold idle , driving and accelerating then warm idle to see what i can see
Maybe it's just me looking for something to do while i am at home with the wife, LOL she is about to kick me out, tired of me taking care of her!
As i explained earlier i would elaborate as to why i am looking for boost leaks, I have not hooked up the laptop and forscan yet, will try to today
Been a little busy with the wife on the mend from her new knee!
When cold i have a real nice even idle, but a little down on take off throttle
when warmed up i can hear/feel the idle is not smooth , no miss but not smooth
Also as i accelerate i can feel say about 3rd gear the turbo sound changes like it just vented off boost, I tried to get a video of it but you really can't hear it, but i can feel it
I will use forscan to run through what i am describing, cold idle , driving and accelerating then warm idle to see what i can see
Maybe it's just me looking for something to do while i am at home with the wife, LOL she is about to kick me out, tired of me taking care of her!
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
I don't know about the rest of yas but I could hear air leaking somewhere when I pressurized mine but I sprayed the entire boost system and got no bubbles so I went away happy. And my understanding is that you DO NOT want to pressurize the crankcase without venting or you'll likely blow some seals that are not designed to withstand any pressure.
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Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
I don't know about the rest of yas but I could hear air leaking somewhere when I pressurized mine but I sprayed the entire boost system and got no bubbles so I went away happy. And my understanding is that you DO NOT want to pressurize the crankcase without venting or you'll likely blow some seals that are not designed to withstand any pressure.
i get that you don’t want to pressurize the the crankcase I was already leaking down to about 10 psi when I put my finger in the ccv then heard air coming from the dipstick took the truck out after that and feel no I’ll affects