[s-cars] Coolant Leak at Exhaust Manifold

[Cody Forbes]

The path of least resistance is out the leaky gasket, not through 13ft of tubing a catalyst and 2 or 3 mufflers. If there was no resistance in the exhaust system you wouldn't need gaskets.

-Cody Forbes (mobile)

> On Apr 2, 2015, at 9:33 AM, mpollan1 at aim.com wrote:
> 
> Hey Cody, I get the condensation thing but why would the condensation be forced out through the gasket rather than path of least resistance out the tail pipe? 
>  
> Pete/Jerry, I've noted the removal of the overflow tank and watching for bubbles and will do so.  The water pump and surrounding area shows no evidence of any leak.
>  
> And then that brings me back to my original quip of what are my (or rather my buddy's) next steps in accurately diagnosing this malady?
>  
> Mark
>  
>  
> -----Original Message-----
> From: Cody Forbes <cody at 5000tq.com>
> To: mpollan1 <mpollan1 at aim.com>
> Cc: s-car-list <s-car-list at audifans.com>
> Sent: Wed, Apr 1, 2015 4:27 pm
> Subject: Re: [s-cars] Coolant Leak at Exhaust Manifold
> 
> Condensation forms in exhaust naturally so I would want evidence that it's not just water coming through a leaky gasket rather than coolant.  
> 
> -Cody Forbes (mobile)
> 
> On Apr 1, 2015, at 2:51 PM, mpollan1 at aim.com wrote: 
> 
> Did no consider that Cody.  Why?  It was a very distinct "bubbling" and after I wiped it with my finger the bubbling persisted until the manifold heated up.  Also, it was in one spot and one spot only.  Upon closer inspection I could see that area of the manifold was discolored relative to any other visible area of the manifold.
>  
> Mark
>  
>  
> -----Original Message----- 
> From: Cody Forbes < cody at 5000tq.com> 
> To: mpollan1 < mpollan1 at aim.com> 
> Cc: s-car-list < s-car-list at audifans.com> 
> Sent: Wed, Apr 1, 2015 2:03 pm 
> Subject: Re: [s-cars] Coolant Leak at Exhaust Manifold 
> 
> How sure are you that it wasn't simply condensation?
> 
> -Cody Forbes
> (mobile)
> 
> > On Apr 1, 2015, at 10:56 AM, mpollan1 at aim.com wrote:
> > 
> > 
> >
> Greetings to all and no this is no April Fool's post although I wish it
> was...
> > 
> > Patient is a 95.5 S6 that is no longer mine but a buddy's.  He has
> been complaining of coolant loss following a TB and WP job.  I popped over but
> could see no sign of a leak anywhere but the coolant was way low and there was
> coolant still present on his garage floor.  Yesterday I went over again for a
> visit and being a nice day I asked him to fire the old girl up and pull her out
> into the sun.  I started looking on the turbo side of the motor and quickly saw
> a pin hole like bubbling from the exhaust manifold, cylinder 2 (cylinder 1 being
> the front most) at the gasket.  Really hard to detect but I got some on my
> finger and sure enough it smelled like coolant.  Within 30 seconds or so the
> leak "disappeared", or so I thought.  Upon reflection, the manifold was already
> so hot that the coolant vaporized without any visible bubbling.
> > 
> > I pulled
> the dipstick and the oil did not seem off color, i.e. milky.  I'm perplexed and
> really do not know how to advise him.  Head gasket?  Cracked head? 
> Compression/leak down test needed to determine the problem?  Any and all advice
> appreciated.
> > 
> > Best regards and be careful out there,
> > 
> > Mark
> >
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