Originally Posted By: robertcope
Some googling came up with this:
http://www.revbase.com/BBBMotor/TSb/DownloadPdf?id=183641
It's sad GM does most things by half-measure, so techs have to fake it or ignore the TSBs.
In my case, I use a cheapo cordless impact gun that only goes to 80 ft/lb as a nut runner to get nuts snug using
the criss-cross pattern, set the car down enough to put some weight on the wheel so it won't spin when I use
the torque wrench in the same criss-cross pattern to 100 ft/lb. It's a harmless compromise that's fast and safe,
spec on the cordless is 1,000 inch/lbs (~80Ft/lb) and verified by testing nuts tightened with it.
FYI - some cheap torque wrenches only function in the CW direction only! Only a good torque wrench will function in the
CCW direction too!
Related story: Yrs ago the toolshop cranked out a tricky series of die sets, they had a specific procedure to install
into the punch press including torquing it down. Worked great, but 8 months later set up guys changed it and used torque sticks
and impact tools to set the dies, then months of breakages came and no one had a clue as to why! Till a toolroom guy worked late
and saw the press shop set one the 'problem' dies - the dirt hit the fan the next day! The lost production, repairs and scrap parts
amounted to $55,000 up to that point! Me? at the time I thought it was a one-off!
I don't wanna fly an airline where techs take short cuts like Torque Sticks and impact guns!
It's too bad GM fails to deliver completely thought-out TSBs techs will follow.