Boost leak test need help??
Thread Starter
Joined: Apr 2005
Posts: 2,574
Likes: 6
From: C.A Honduras!
Boost leak test need help??
iam rigth know doing a boost leak test to my car and when the boost gauge hits 1.0bar=14.7psi air starts to leak from the oil filler cap on the valve cover , i dont understand this cause i dont have any oil leaking from it,what could it be is this normal?
thanks
thanks
Thread Starter
Joined: Apr 2005
Posts: 2,574
Likes: 6
From: C.A Honduras!
i found the problem
i hooked up my homemade pressure tool on the maf pipe and not on the turbo itself so the maf pipe has a hose that goes directly into the valvecover so i unhooked this hose used a bolt to prevent air coming out of it and that was it the boost gauge went to 22psi with no problem and to my surprise i found 3 boost leaks they were practically invisible i would have never ever known this leaks where there i highly recommend a boost leak to every one my car has 20,000miles on it.
thanks
i hooked up my homemade pressure tool on the maf pipe and not on the turbo itself so the maf pipe has a hose that goes directly into the valvecover so i unhooked this hose used a bolt to prevent air coming out of it and that was it the boost gauge went to 22psi with no problem and to my surprise i found 3 boost leaks they were practically invisible i would have never ever known this leaks where there i highly recommend a boost leak to every one my car has 20,000miles on it.
thanks
I think this brings up another question though. How much pressure should the oil cap be able to hold? and does it even matter? I did my boost leak test today, had the tester hooked up to the maf pipe and fixed a few bad leaks. Once they were all good I noticed the oil cap would leak at around 15 psi just like the OP. I know there are lines that go into the valve cover but I purposely tested from the maf pipe and left all lines connected so that I could pressure check the entire system. I just wanted to check with evom before I bought a new cap, and I came across this thread. Any inputs?
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i found the problem
i hooked up my homemade pressure tool on the maf pipe and not on the turbo itself so the maf pipe has a hose that goes directly into the valvecover so i unhooked this hose used a bolt to prevent air coming out of it and that was it the boost gauge went to 22psi with no problem and to my surprise i found 3 boost leaks they were practically invisible i would have never ever known this leaks where there i highly recommend a boost leak to every one my car has 20,000miles on it.
thanks
i hooked up my homemade pressure tool on the maf pipe and not on the turbo itself so the maf pipe has a hose that goes directly into the valvecover so i unhooked this hose used a bolt to prevent air coming out of it and that was it the boost gauge went to 22psi with no problem and to my surprise i found 3 boost leaks they were practically invisible i would have never ever known this leaks where there i highly recommend a boost leak to every one my car has 20,000miles on it.
thanks
really doesn't matter where he found them...cars are different...you have different mods etc.
If you want common leaks then that's a different story. Couple off the top of the head..throttle body seal leak(20k+/high boost applications)/licp, injectors...etc
Get your dishwashing soap out and put in a spray bottle....
If you want common leaks then that's a different story. Couple off the top of the head..throttle body seal leak(20k+/high boost applications)/licp, injectors...etc
Get your dishwashing soap out and put in a spray bottle....
