Hyundai Repair: REMOVING CALIPER MOUNTING BOLTS, slide bolts, torque wrench

Question
HI,  I AM HAVING A DIFFICULT TIME REMOVING THE BOLTS THAT HOLD THE CALIPER ON. I HAVE SPRAYED PENETRATING FLUID FOR DAYS & TRIED HEATING IT BUT STILL THE BOLTS WILL NOT BUDGE.  I WAS THINKING OF BUYING AN ELECTRIC OR BATTERY POWERED IMPACT WRENCH.  I HAVE NEVER USED AN IMPACT WRENCH.  WOULD YOU RECOMMEND USING AN IMPACT WRENCH TO REMOVE STUBBORN BOLTS? ALSO, I BOUGHT A TORQUE WRENCH. I HAVE NEVER USED ONE BEFORE. HOW DO YOU KNOW WHEN YOU HAVE REACHED THE TORQUE THAT YOU HAVE THE WRENCH SET FOR?  I HEARD A CLICKING SOUND.  DOES THAT MEAN THAT I HAVE REACHED THE PROPER TORQUE?

Answer
In most cases, a long-handled wrench will remove stubborn bolts.  I don't recall ever seeing one of the 17mm caliper mounting bolts break (although I've heard of it), so I wouldn't be overly concerned about breakage.  If your wrench isn't long enough, you might try sliding a pipe over the wrench (if you have a good tool warranty).  If we're talking about the 12mm or 14mm caliper slide bolts, then you'll need to find out what's holding them up and be *very* careful with them.

As for the impact wrench, that's an acceptable but expensive attempt at a solution.  I remove and install caliper mounting bolts with an impact wrench regularly.  You'll need to be careful, though, because it's much more difficult to feel when a bolt is getting ready to break or gauge appropriate tightness when using an impact wrench.  If you use one, I'd still recommend retightening the bolts by hand until you've used the impact wrench enough to get a feel for it and its regulator.

If the grip on the end of your torque wrench screws in/out to adjust the torque setting, then yes, that clicking you hear (and feel) is the indicator that you've reached the preset torque.