the damn thing SNAPPED! [was: Re: pressure plate bolt torque? ]

Peter Berrevoets pjberr at rogers.com
Thu Mar 28 09:36:35 EST 2002


Ouch!!

Those are the torque specs for the flywheel to crankshaft bolts, the
pressure plate is held on with allen bolts torqued to 25 NM or 18 ft/lbs. No
wonder they snapped!!

My monkey lad failed to torque them on even that tight just recently and one
fell out making the inside of the bell-housing look like a hand grenade went
off inside - aargh!!

HTH

Peter

Peter Berrevoets
pjberr at rogers.com
1990 200TQ
1989 200TQ - Donor
Toronto, Canada

http://members.rogers.com/pjberr

-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of auditude at get.net
Sent: Wednesday, March 27, 2002 11:02 PM
To: Alexander van Gerbig; quattro at audifans.com
Subject: the damn thing SNAPPED! [was: Re: pressure plate bolt torque? ]


Thanks Alex,

I ordered new bolts.  They do not have anything that looks like a washer.
These look like regular allen
bolts.  I got them from Carlsen.

Here's what just now happened.  I put the pressure plate on and bolted it up
snug.  Then I removed one of
the bolts, and I put some red loctite on it, #27100.  The Bentley calls for
locking compound D 000 600.

Then I proceeded put the bolt back in place, using the lower of the two
torque settings, 55 ft lbs, which is
for the shouldered bolts.  The non-shouldered bolt spec is 74 ft lbs.

As I was tightening it with my huge click-type torque wrench, I was thinking
that it sure wasn't getting
snug, and it ought to be getting snug anytime soon.

As I feared as I was turning it, the FREAKING BOLT SNAPPED!

So, since I had red loctite about to harden that stupid POS bolt piece in my
flywheel, I did the marathon
disassembly and pulled the flywheel back off.  Probably wasted the blue
thread compound that came on
the new flywheel bolts.

I managed to get the piece out of there before the damn stuff hardened.  No
need for an easy out.  I used
a little nail, a hammer, and finally just the tip of my finger to twist that
sucker out.

The fact that I got that piece out of there without much drama, almost made
up for the rush of negative
emotion I felt as it snapped.

So, I guess the stupid loctite acted like a lubricant, causing the actual
torque to be much higher than the
wrench could feel?

Is there something special about the D 000 600 compound that this is not a
problem?  Did I use too much
loctite?  Actually, I know I used too much, because I coated the whole bolt
with it, and it was running
down the flywheel.

Any ideas on this?  What a rush!

Thanks,

Ken

On 27 Mar 2002 at 22:37, Alexander van Gerbig wrote:
>
>     You should use the new shouldered type bolt, this means there is a
built
> in washer cast into the head of the bolt.  You've seen a shouldered bolt
> before most likely, it has a regular hex head on it, but also flairs out
to
> form a built in washer, all one piece.  The flywheel bolts are stretch so
> don't reuse, some have reused, but safety wise I have always gone with
> replacing them.  If you got new bolts from the dealer, which you should,
> then use the shouldered bolt spec.




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