You just need leverage.... Use a long breaker bar and a deep 18mm 1/2 impact socket. Works for me...I am changing the rotor on the front right of a 2002 Jeep Grand Cherokee Laredo. I cannot get the caliper mounting bracket off. The two bolts are 18mm. They are not left-handed threads, are they? I have tried all I know to do to remove these. The ones on the left came off with a little lubricant, but so far nothing is working. Any suggestions?
This is one of the MOST used tools when working on a 10+ year old jeep:
Or Go to any auto parts store for similar...