Am I Just Lucky?

["Al Powell" <APOWELL@agcom.tamu.edu>]

Mr. Orin orin@netcom.com (Orin Eman) said:
> 
>> Sure, me, I'd want a 26 if it was possible, this is serious torque, in fact,
>> there is NO higher torque setting on a q than that 1 bolt.....  .0001 is
>> prolly within manufacturers tolerance, and I would argue the 6 point thing
>> before the 12, but man, this is a critical life support operation here...  I
>> bit the bullet and just bought the proper audi tool.....  Not sure it's a
>> mute, cuz few have that torque wrench available anyhow  (the cheapest I found
>> it was 300USD)....  Don't forget the loctite either.....  I can share that I
>> have tightened at least 3 of these bolts that were incorrectly installed...
>> Beware of your actions here, they are critical...
> 
> It took a 5' pipe to break that bolt loose... I used the same pipe putting it
> back on... and I remembered the loctite.  I do have the 2084, but not
> the extension.
> 
> I agree this bolt is critical to the health of both the valves and the
> crankshaft.  It would be very sad if the end of the crank got mangled
> if it came loose...

I'm trying to figure out where you gents get some of your 
information...and whether I'm having some good luck.

1)  To break my crank bolt loose, I used a 2 foot extension on a 
1/2" drive breaker bar.  It took a good stout pull, but that was all. 
Am I just lucky??  I figure that at the end of a 2-foot extension, I 
can pretty easily apply 300 lbs/ft of loosening torque.  I had a 4-
foot pipe rady to use, but didn't need it.  (I plan to use it when 
putting the bolt back on.)

2)  My Bentley specifically shows the torque on the crank bolt to be 
258 lbs/ft., or 350 n-m.  I have heard specs of upwards of 300 foot-
pounds quoted for this.  Unless there is a heckuva lot of variation 
of torque specs from year to year on the I-5, someone is overtorquing 
their bolt, according to my sacred "Book o'Bentley".

3)  I hear a lot of discussion about using Loctite on the crank 
bolt when re-installing it.  BUT: the Bentley in section 13.4 
specifically says that when re-installing the crank bolt, the 
threads should be coate with "Anti-corrosion compound AMV 188 1 00 
02".  Unless this is Loctite under a proprietary name, it sounds to 
me more like they are recommending use of a compound like Anti-Sieze 
than something which locks the threads.  And for that matter, I don't 
think I need to worry much about a bolt torques to 258 lbs/ft coming 
loose just because it has a bad day.



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Al Powell, Ph.D.                 Voice:  409/845-2807
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