Re: timing belt questions

[Don Hoefer <hoefer@eng.pko.dec.com>]

Richard,

> 2. I recall the 2079 torque adapter discussions.  I think the Bentley
> says 258 ft lbs.  to the adapter.  How long is the adapter and what is
> the direct torque I should apply to the bolt?  Is this an acceptable
> way to do this?  How has everyone done this?  This is really fishing
> for a do I need this tool.  Can I borrow a ¾ inch drive torque wrench
> and apply this 500 - 600 ft lbs. torque to the bolt?  What size is the
> bolt?  The Bentley doesn't say to buy a new bolt.  Is this correct? 
> What do I apply to the bolt on reinstallation?

The adapter is almost a one foot extension, almost doubling the torque.
I first rented a torque wrench (very few places have them, you have to
go to a serious industrial rental place) but I do it another way now.
I put a long pipe on the end of my Sears 3/4" breaker bar which is in the
adapter.  I then measure four feet out laterally from the bolt and I
hang from the pipe yielding four times my body weight as torque at the
end of the adaptor (~500lbs. at that point).  You would have to adjust
this distance for your weight.

Very crude ASCII art:

               /
              /
             /|
            / O
           /  O me
          /
         / breakerbar/pipe
        x
adaptor/
      O
      |  4ft  |
      bolt
      
You can feel it when it is tight enough, no need to jump or tug.  It suddenly 
feels like it will not go any tighter, it just stops turning.  The front axel
nut gives the same feeling when you tighten it.

I use Locktite PST on the bolt.  It has a teflon additive to make removal
of the bolt easy in the future.

I don't know what size the bolt is, but a mechanical engineer friend of
mine who designed nuclear power plants said that it could probably hold
up my house.

Don Hoefer
'82 Coupe