[s-cars] RE: Catastrophic Engine Stoppage
Mtgadbois at aol.com
Mtgadbois at aol.com
Sat Jul 3 13:33:42 EDT 2004
Serge,
I may be the first for pistons but I hope not! I tore the front end out and
found that the crank gear had self-destructed!?! Apparently, something must
have caused the gear to explode? So far no piece is greater than one inch.
Also, the belt tensioner was not loose nor was there any damage/wear on the
serpentine belt. The last belt service was done 3 years and 40K miles ago
and both the timing and serp belt showed no wear. Of course, the crank bolt
is tight. Could the damper to crank gear bolts have come loose and caused
this? I'll have to get a tool to get the damper off and then assess the damage
to the end of the crankshaft, etc.
Anybody in Chicago have one for borrowing this weekend? Ribs on the Fourth.
I'll probably also yank off the head to see what damage there is.
Interestingly, the head had stopped in a position where turning over the enginge did
not hit pistons. Moving it's cam position a bit caused it to then be in
interference. Or maybe whatever would interfere is already bent over. Oh well!
Mark
In a message dated 7/3/2004 12:23:49 AM Central Daylight Time,
s6serge at verizon.net writes:
Mark,
There is no easy way to say this, but these are interference fit motors. If
timing between cam and crank is compromised, valves will come into contact
with the pistons almost always resulting in at least a rebuild for the head.
I have not heard of a case where enough damage was done to the piston to
warrant its replacement.
I really hope I am wrong somehow in your case.
Serge Filanovsky
95.5 S6 Avant
95 S6 Avant SOLD
You mean how loose is loose? Just prying the cam belt cover away I can see
that cam belt can go around the gear without even touching it. Over the
weekend I'll disassemble the front to get the cover off and hopefully
nothing will be binding but who knows? When this happened I noticed no
noises or anything binding.
Mark
In a message dated 7/2/2004 9:56:12 PM Central Daylight Time,
s6serge at verizon.net writes:
Exactly how loose is totally loose? Like does the timing belt move/skip
teeth?
Valves and pistons sitting in a tree...?
Serge Filanovsky
95.5 S6 Avant
95 S6 Avant SOLD
> More info:
>
> Tonight when I was poking around my engine I noticed that my timing belt
is
> totally loose. Tensioner gave out? Firetruck! Belt was changed for the
PO 3
> years ago by a "fine" Denver repair shop.
>
> For those that have been there and done that how much is this fun going to
> cost me? I know how to twist a wrench but I do not have a lot of free
time.
> Luckily I have three cars.
>
> Mark
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