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Hmm, I thought they were 17mm, anyway, pressure will make it very hard to remove, impact is the key! if you have the wrench solid on the bolt, 6point socket or box end wrench is best, a solid whack from a ball peen hammer should pop the bolts loose. PB blaster won't help much, maybe a little for the rust on the surface of the bolt head, but it's just the locktite holding it still, impact will fix it, unless a PO (dumb PO that is...) put RED or GREEN locktite on. then Heat is the only way to remove. the problem with that is the caliper is in the way of getting the heat where it needs to be... you have to heat the socket threads, not the bolt.
good luck, I hope it's not red...
John
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!
My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!
1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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