[GTALUG] (very off topic) torque spec of impact wrench

[William Park]

This is what happened after getting 4 new brakes and 2 new calipers at 
the dealership.  They over-tightened it!

     - I tried 12in pipe (it's all I have).  It slips, and I don't want 
to step on that.  Maybe longer pipe will work.

     - I've been told (by YouTube, Google) that you shouldn't apply any 
oil or anti-seize grease.

     - VW uses 17mm bolt, instead of lug nut.  So, cutting them off is 
not an option. :-)


1. I'll try to find 2-4ft pipe at reasonable price.

2. If not, Canadian Tire has sale on "air wrench"
     - 
https://www.canadiantire.ca/en/pdp/maximum-impact-wrench-with-built-in-regulator-3-8-in-0581968p.0581968.html
Web says "3/8", manual says "1/2", and I'll see what the box says.

Thanks guys.  I wish I paid more attention to "shop class" in high 
school.  "If I knew then, what I know now...".


On 2023-11-03 09:32, Don Tai wrote:
> Can you drive your car to a mechanic? It might be cheaper to have them 
> loosen it with their air powered impact wrench. Other options I've used
> 1. penetrating oil (as mentioned)
> 2. breaker bar (long pipe)
> 3. propane torch (also mentioned)
> 
> Once loosened then add some anti-seize compound so that this does not 
> happen again in the future.
> 
> 
> On Fri, 3 Nov 2023 at 03:07, William Park via talk <talk at gtalug.org 
> <mailto:talk at gtalug.org>> wrote:
> 
>     Hi (another very off topic),
> 
>     Wheel bolts on my VW are seized pretty hard.  Standing on 24in breaker
>     bar doesn't help, and that's 300ft-lb torque.  So, I'm thinking about
>     getting an impact wrench.  Those with greater than 300ft-lb are very
>     expensive.  I found one with 250ft-lb spec at my price range.
> 
>     Question is, is there difference between static torque vs impact
>     torque?
>        In other words, will 250ft-lb impact wrench loosen 300ft-lb bolt?
> 
>     Browsing YouTube, I learned that torque specs are always misleading and
>     inflated.  This means, I have to find 600ft-lb or greater, and that's
>     serious money.
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