Am I going insane or missing the obvious here ?
I finally got a nice wee air compressor that is man enough for air leak tests and used the custom Teeside bungs for the first time on my car today.
I used the bungs to block the breather connection between MAF pipe and cam cover. I used another bung to block the hose that enters the pressure pipe, and I bunged the hose into the wastegate with a 1/4" extension before using another bung with tyre valve to pressurise the entire system from the MAF hose.
It doesn't hold pressure basically... but the really weird thing is that I can hear a bubbling noise that sounds for all the world like air leaking past an oil seal (in the turbo) such that I think I hear bubbles in the sump. I can't hear an air leak anywhere else just frickin bubbles and the system holds no significant pressure.
On the road, the car doesn't quite hold 1.4bar like it used to so I suspected a wee leak from maybe a new hose that wasn't quite tightened enough... or maybe a damaged intercooler.
The car doesn't use any significant amount of oil so I'm wondering is this anomolie an early warning sign that an oil seal has seen better days. Obviously the seal is healthy enough that oil doesn't thru to the air cavity as I *NEVER* seen the car smoke.
Or am I just going nuts having forgotten something stupid here ?
Only thing that occurs to me now as I type is that if the TBV has failed in such a way that air is leaking past the diaphragm into the control hose then I could be pressuring the intake manifold which might explain air getting to the crankcase... but that TBV is only a month old... V.strange !
Paul
I finally got a nice wee air compressor that is man enough for air leak tests and used the custom Teeside bungs for the first time on my car today.
I used the bungs to block the breather connection between MAF pipe and cam cover. I used another bung to block the hose that enters the pressure pipe, and I bunged the hose into the wastegate with a 1/4" extension before using another bung with tyre valve to pressurise the entire system from the MAF hose.
It doesn't hold pressure basically... but the really weird thing is that I can hear a bubbling noise that sounds for all the world like air leaking past an oil seal (in the turbo) such that I think I hear bubbles in the sump. I can't hear an air leak anywhere else just frickin bubbles and the system holds no significant pressure.
On the road, the car doesn't quite hold 1.4bar like it used to so I suspected a wee leak from maybe a new hose that wasn't quite tightened enough... or maybe a damaged intercooler.
The car doesn't use any significant amount of oil so I'm wondering is this anomolie an early warning sign that an oil seal has seen better days. Obviously the seal is healthy enough that oil doesn't thru to the air cavity as I *NEVER* seen the car smoke.
Or am I just going nuts having forgotten something stupid here ?
Only thing that occurs to me now as I type is that if the TBV has failed in such a way that air is leaking past the diaphragm into the control hose then I could be pressuring the intake manifold which might explain air getting to the crankcase... but that TBV is only a month old... V.strange !
Paul
. Drove the car today and with the window down the air leak noise is amazing from the outside - I'm loosing it from somewhere but I'm damned if I can work it out!
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