[s-cars] Crank Bolt From Hell (lessons learned)

[Tom Mullane]

Date: Sun, 02 Jan 2005 17:20:09 -0700
From: "Southerlin, Russell S" <russell.s.southerlin at lmco.com>
Subject: [s-cars] Crank Bolt From Hell (lessons learned)
To: s-car-list at audifans.com
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	<3352E03FC741BB4E97EDB6991C8DC44105CB1A83 at emss02m18.us.lmco.com>
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Russ, 

Sounds like a fun time.

I disagree with you about the impact gun.  The gun is tough on the clutch,
trans, and possibly the rod bearings.  Sometimes ya gotta do what ya gotta
do to get things apart, but the impact is a last resort for me.  I wonder if
the key was cracked by the impact gun?  I've seen them damaged, but usually
when the bolt is too loose - obviously not an issue in your case ;-)

Tom


<snip>
Now for the lessons learned.  I believe the safest way to remove the crank
bolt is the impact wrench.  I believe if I had continued to apply more
torque to the bolt with a bigger breaker bar it would have sheared off the
keyway and possibly spun the crank - not a good day no matter how you look
at it.  Next time I will acquire a 3/4 inch impact by renting or borrowing.
The impact only applies the force right at the bolt head and it is not
reacted through the harmonic balancer and keyway.  The proper tool (3056?
tool) or my home made tool reacts the torque through the harmonic balancer
and keyway which is not designed to take 800ft-lbs.

<snip>

Russ
95.5 S6
Castle Rock, CO