Torque Wrenches - my answer... (Fifield, Douglas)

[SJ]

> From: megara at mac.com
> Subject: Re: Torque Wrenches - my answer... (Fifield, Douglas)
> To: SJ <syljay at optonline.net>
>
> OK, so using your numbers SJ and my formula:
>
> TW = (NT * LT) / (LT + L2079)
>
> TW = 258 * 1.46 /  (1.46 + 1.0)
> TW = 153 ft-lbs
>
> So  instead of using the 258 ft-lbs on the torque wrench, you will use
> 153 ft-lbs when you have the 2079 tool on the end. It makes sense - the
> 2079 tool extends the torque wrench by ~60%, so there is a reduction on
> the setting by 60%.
**** What makes you think that the torque which would result by using my
shorter length wrench is incorrect?
This is the problem . . .we dont know what the final bolt torque is supposed
to be.
The only number we have is Phil's page which states 340 ft lbs. There is no
source for this number.

>
> However....what the heck is that 2084 tool? I quote from
> http://www.zdmak.com/audi_tools.htm  :
**** Tool 2084 holds the crank in place while you remove the crank bolt.


> Your interesting footnotes are actually contradictory. One says to use
> a lubricant and the other says to use loctite, if I read them
> correctly. I would just use the loctite---if you paint it on the
> threads near the bolt head, it will seal the bolt and not allow any
> substantial corrosion to begin.
**** The footnotes are not contradictory, the quotes from the Bentley manual
might be. I dont make this stuff up.
If you use the loctite, then you are following the procedure for the diesel
engine. Is that what you have? A diesel engine?
Some listers mentioned using loctite. Phil translated the german description
for the chemical that Audi specifies to use on the bolt. It translates to
"anti corrosion". That doesnt sound like Loctite.
I merely followed up on this discrepancy, and added my findings in the
footnote.
Your comment is probably right. This anti corrosion stuff is probably just a
sealant to prevent any water from migrating down the bolt threads and
seizing up the bolt.
If that is the case, then one has to know which loctite to use. The red
loctite is also a sealer, plus you will never get the bolt off again.

Its all in the details.

SJ