[s-cars] Engine completey hosed

[K Hayes]

Dave,

Would be very interested in photos if you get them posted.  Piston  
burn through must have happened before the head gasket was gone. What  
ever cause that event might have initiated head gasket failure at the  
same time.  Did you notice loss of power accelerating back onto the  
highway after fill ups before the detonation or an oil smell in the  
exhaust, if you were idling somewhere on that trip?  I think remember  
your write up right after you got home in limp mode, but I couldn't  
find it.  Maybe we were still on yahoo.groups at that time.

Question is, what could make a cylinder run so hot to melt a piston?   
Would running too lean be enough on your beefed up motor? Head gasket  
failure doesn't usually cause melted pistons.

Kenny Hayes
Fort Collins, CO


On Jan 18, 2009, at 8:39 AM, djdawson2 at aol.com wrote:


  Eh...

As they say, stuff happens.? Having the car flatbedded for 700 miles  
and arranging alternative travel for the occupants probably would  
have cost me nearly as much as cleaning up this mess.? Part of me  
knew that when I was making the trip back home.

I would agree that the flame travel is what caused the burn... and  
that it started with the headgasket.? But I am still wondering why it  
burned up a piston.? The damage to my head is very minor... nothing  
like the pics in the link that Dave F sent.? I am certain the head is  
repairable.

Oh well... I did get 60k fun and fast miles out of it, and I'll get  
many more once I get this resolved.

Dave







-----Original Message-----
From: Calvin Craig <calvinlc at earthlink.net>
To: djdawson2 at aol.com; forgied at shaw.ca; s-car-list at audifans.com
Sent: Sun, 18 Jan 2009 1:05 am
Subject: RE: [s-cars] Engine completey hosed










Dave,

Is it possible that the headgasket breached between two cylinders  
thereby
allowing the flame front to travel from one cylinder to another.   
This would
explain the "detonation" because one cylinder would see it as a
pre-detonation event.  I could see how doing that for 700 miles would  
cause
a problem.  That's the best hair-brained theory I could muster.   
Sorry that
this happened to you.  It reminds me of my first engine rebuild I did  
when I
was 17 and the engine let go when I was 18.  The stupid oil pump bolt  
had
backed out and I wasn't running an oil pressure gauge.  So I would have
easily been able to fix it in time for just the price of an oil pan  
gasket
but instead I ruined all the bearings.

--Calvin


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of djdawson2 at aol.com
Sent: Saturday, January 17, 2009 11:50 PM
To: forgied at shaw.ca; s-car-list at audifans.com
Subject: Re: [s-cars] Engine completey hosed



  Holy smokes... that guy's is WAY worse than mine.? Mine is a very  
small
"line" between 4 and 5.? I'd like to see his pistons, and I'd like to  
know
why it happened at all.? The headgasket doesn't bother me... it's what
happened to the pistons that makes me scratch my head.

FWIW... it was an all metal headgasket, and I did use ARP studs.

Dave







-----Original Message-----
From: David Forgie <forgied at shaw.ca>
To: s-car-list <s-car-list at audifans.com>
Cc: djdawson2 at aol.com
Sent: Sat, 17 Jan 2009 8:06 pm
Subject: [s-cars] Engine completey hosed










Dave: Sorry for your loss.? Such failures are NOT uncommon, e.g.:


?


http://forums.audiworld.com/s4s6/msgs/253448.phtml


?


The problem could be a metal/paper headgasket (instead of the later all
metal gasket) or


it could be stretched OE head bolts (I sure Hap will chime in on that
note).? High boost


engines probably need an all metal head gasket and ARP head studs and  
nuts.


?


But that is just an opinion.


?


Dave F.





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