[s-cars] Boost leak is back

[Sean Douglas]

JR:

Could be a long shot, but on my 1997, I have a plastic crossover pipe
and the mounting tab broke off allowing the tube to rub back and forth
on the mount creating a small hole which allowed a boost leak, but only
under high pressure. If it's the metal one then you should be OK.

Sean Douglas
1997 Audi S6//RS2-spec
1990 Audi 90 quattro 20v


> -----Original Message-----
> From: s-car-list-bounces+quattro20v=telus.net at audifans.com 
> [mailto:s-car-list-bounces+quattro20v=telus.net at audifans.com] 
> On Behalf Of JR
> Sent: Friday, September 03, 2004 3:40 PM
> To: S-CAR LIST
> Subject: [s-cars] Boost leak is back
> 
> 
> Ok so I had the car boost leak free for a few weeks and now 
> it's leaking 
> again.  The car does make boost but not like it has been.  It 
> seems like 
> the turbo whoosh and whistle noise is louder than it should 
> be too.  I 
> checked at the moisture trap and the ecu.  I've had that 
> failure before 
> and it doesn't feel like that.  That was even less boost that 
> I'm making 
> now and the car really bucked at higher RPMs.  This is smooth boost 
> making a lot of whistling and whooshing but cutting out at 
> higher RPMs, 
> but not bucking and jerking.  It feels like a cracked hose that has a 
> hole that opens under high boost and closes when the pressure 
> lets off.  
> I checked all 3 Samcos and they're on tight.  The car has 
> about 100K so 
> all other hoses are probably not in that great of shape.  
> Where are the 
> common points of boost failure besides the 3 Samcos?  By 3 
> Samcos I mean 
> intercooler to crossover pipe (Michelin man), the turbo to crossover 
> pipe and bypass valve, and the top of intercooler to intake 
> manifold.  I 
> have the tester built to pressurize the system and listen for 
> leaks, but 
> have to go out of town right now so I can't do it.  Any hints as to 
> where the common leaks are would be great.
> 
> Thanks,
> 
> JR
> 
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com 
> http://www.audifans.com/mailman/listinfo/s-> car-list
>