dmorgan, recommend jacking the car higher so there is more clearance to work. Use a cheater pipe over the breaker bar handle to increase the torque. Make sure the socket stays square to the bolt head so you don't round it off. You may also try removing the caliper bracket with the caliper attached, then work on the stuck caliper bolt with the bracket in a vice. That way you could use an impact tool to loosen the bolt.
A bottle jack would help on the passenger side caliper bolts, but on the driver's side the breaker bar handle needs to turn toward the floor.
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Fred Hoelzle
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