I've been trying to install Brembo crossdrilled rotors on my car for a while now. The back ones went on fine, but I can't get the front ones on because the caliper bolt is too tight. I have the 300zx front brake conversion and so I haven't touched the calipers since the shop put them on (the brake pad change didn't require their removal). Now I can't get the bolts holding the caliper on to turn. Anyone have any ideas on how to get them unstuck? I've tried a cheater pipe, etc. but it didn't really help.

 

heeh, use an impact gun and hope it doesnt break. Spray some WD-40 and use a pipe, but im sure you tried that already. Other then that you dont have much options..sorry

 

I hate it when mechanics think that everything needs to be torqued to 350 ft-lbs. If they are THAT tight, I would suggest that you use a 6-point socket so you don't round off the bolt heads. I don't know of anything else to suggest except what you already know:
rightie - tightie
leftie - loosie

good luck

 

Try Plus-Gas, if you have it. (It's like WD-40, but more so.) Soak it, leave it and try later. Bit of a leap of faith, but you have to slightly tighten it up first to break the corrosion seal. I can never bring myself to do that. You always feel too close to stripping the thread, or snapping the bolt.

Otherwise, if you can hit the bolt (along it's long axis) really hard, that might help free it. Use a punch and a big hammer with a ring spanner, or hit the back of a non-ratchet socket driver. A 2-person job.

Or try an Impact Screwdriver and the aforementioned Big Hammer.

You'll need someone else behind the caliper pushing with a lump of wood so that all the whacking goes into the bolt, rather than wrecking your wheel alignment / suspension / wing,(when you miss...)

I sympathise totally. This is a way of life if you have a bike. Copper grease every bolt when it goes back (except where safety considerations require special threadlocks / greases, of course)

Best of Luck.