Question about 2008 Buick Lucerne
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Posted on Jan 02, 2017
hi from uk most rear brake calipers have auto adjust mechanism and yours may be the same as on uk models whereas to compress the piston back into caliper to facilitate fitting new pads ? you have to both press and rotate piston and this sends piston back on the screw auto adjuster you will notice that piston has a couple of slots on its head ? this is there for enabling screw back having said this there is a rear caliper piston compress tool that does this job and the cheapest tool and good quality is made by draper tools and costs approx £10 in uk but can be obtained at any good auto stores and has instructions on use well worth the investment ? just one tip pistons normally screw back clockwise however! on fiats? the nearside screws anticlockwise so just observe that piston is going back when rotating c/wise if not you can fit a 3/8" drive extension and t bar to the rotator boss and using pressure ?turn piston a/clockwise hope this helps one word of advice !make sure you bleed brakes afterwards to clear out dirty fluid untill clean fluid shows this will improve brake pedal best wishes from uk
Posted on Mar 23, 2010
SOURCE: The piston of the rear
On some vehicles with rear disk brakes the piston also is self adjusting to keep the pads close to the rotors. This piston screws in to back it off. Turn the piston counter clockwise to back it off.
Posted on Oct 08, 2010
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