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Wife has 2002 cavalier Ls.  Front caliper slider bolts were dry and causing poor braking and warped rotors and uneven pads.  went to autozone and got replacement bolts and also replaced the boots going into the caliper.  Put brand new permatex high temp brake grease on and in boots.  Put bolts in, took a break for about half an hour, came back and bolts were locked up and couldn't even slide them anymore.  All stuff was brand new.  Got them loose and sliding good and bolted them in and drove for about a week and noticed poor braking again, especially in wet conditions.  Car has new rotors and pads as well.  I checked the sliders and they were ceased AGAIN!!!  had to use a c-clamp to press them out and totally destroyed them so i had to get another kit and also replaced boots again in case of dirt inside or whatever.  Same exact deal happened with this set too!!  why do they keep drying up and ceasing?  Can you put too much grease in and cause like a vapor lock?  Almost seems like the grease turns to paste and then like a glue and then all functions stop!  almost like the grease reacting with the rubber in the boots.  I would like to put all delco stuff back on but it will cost over $100 for the bolts and boot kit for both wheels.  One other question.  the boots have a big flange on one end and smaller flange on the other end.  at the bigger flange there are these like ribbed edges inside the boot.  I have the boots installed on the caliper so that the larger flange and ribs are facing the engine, smaller flange would face the pad closest to the piston.  Never even tried putting them in the other way, not sure if larger flange fits into the recess in the caliper.  this is driving me nuts!!  these calipers should slide like a hot knife through butter, there's not dirt and plenty of grease and all new parts.  what the heck is wrong??  

what type of grease...... silicone dielectric tune up grease....  i hope not.. it has dissolved sand it it.. it is for thermal transfer... under ignition modules...


behind the counter...  there are little packages of 99 cent brake lube...    brake slide grease is called Sil glide..

you can also use Spark plug anti seize...


white lithium grease also works...

regular wheel bearing grease...


the thing is  NOT TO USE is Dielectric tune up grease...   it locks up stuff when it gets hot... i run across this problem almost weekly...   nobody knows.. but me.. and now you... pass it on... and when people laugh at you ... shrug it off..  they will be paying for it later..   the mechanic down the street was in the parts store when i was...   he had a star adjuster off drum brakes in his hand.. still clamped with 2 pairs of vice grips.. it would not move... i told him..  he laughed at me... some people just don't want to learn..

i had one caliper slide that was so tight.. i could not bust it loose with a 40 ton press..  

its is possible that someone some where has used it on your car.. and its still there..

you will need a tubular wire brush and brake cleaner to try to get any of it out...  

i did not use dielectric grease.  have tried high temp wheel bearing grease as well.  the grease i used most recently is a synthetic grease for brake sliders.

my only other guess would be maybe a reaction to the metal that is used in the aftermarket caliper bolts.  I may have to try another auto parts store and see who makes there stuff.

i also made sure the parts store gave me the right parts and they say they did

it just doesn't make sense!!  i should be able to slide those bolts in and out easily with my bare hands after they are greased and they just lock up after a few minutes of sitting and they didn't even get hot!

i've got a baby on the way, i need this car to stop like it's supposed to.  any other ideas/suggestions?

thanks  

were you able to clean out all of the old grease...

verify the bore is not damaged...

do the calipers fully release when the brake pedal is released??/
so the brake rotor is free to turn ...

you are testing the caliper function .. with at least two lug nuts on to hold the rotor flat against the hub....

you also need to verify that there is no play in the wheel bearing..

just curious....   the brake caliper bolt kits...

were the H5046 or H5047...

the az site says to sell out the H5046 bolts .. and then just sell H5047...  i don't know what the difference is..

the calipers slide on rubber sleeves...   it is possible that the rubber is reacting with the grease and locking up..

or did you get the earlier hardware..

the new rubber bushings are H5770 ... if you want to start from scratch...

they look like 5 bucks for 4 rubber sleeves...   perhaps spend 10 bucks..      take one and expose it to the various greases you are using..   i have had other improper rubber selections swell in seconds when exposed to the improper lube..

perhaps..   get a full size tube of SIL GLYDE From a brake supply store.. comes in a white cardboard box.. 4 to 6 ounces...  

here are the delco part numbers they also have some numbers that have been replaced...


BOLT/SCREW,FRT BRK CLPR (W/SLEV)
Part Number:  179-1307
Product Notes:
[Front Caliper Bolt w/Sleeve]
Per Vehicle: 1; Years: 1998-2002
Vehicle List


BUSHING KIT,FRT BRK CLPR GDE PIN
Part Number:  179-1164
Product Notes:
[Front Brake Caliper Guide Pin Bushing Kit]
Per Vehicle: 1; Years: 1998-2002
Vehicle List


this is one of the type of packaging sil glyde is packaged in..
http://www.allbatterysalesandservice.com/browse.cfm/4,2518.html

NAPA auto parts carries Sil-Glyde® under part # 765-1351  

put new boots in so didn't have to clean old grease out

bore is not damaged but now i question whether the boot is fully stretched out and not bunched up in the bore.  the new boots took a little effort to install.

yes, calipers release and rotor spins freely but you can see the wear pattern that is on the rotor and it indicates that bottom side of caliper is engaging more than the top side.  The calipers are in excellent shape yet, no leaks or signs of uneven piston.

both hub bearings are new

i also noticed the two part numbers from autozone and i don't know which one i got.  the pics both look the same though even though you can't go by that.

i'm curious about this sil glyde, sounds like good stuff.  Also wondering about these two piece caliper bolts that come after market.  I have the OEM bolts and they were horrible and not smooth.  i even tried sanding them down smooth and greasing but they lock up too!  I'm looking into another boot kit possibly from carquest or advance auto but my guess is they all use the same warehouses.  I seriously think it's the rubber boots!  

write back anyone if you have more input, thanks for the help!