the caliper & piston must be cleaned meticulously., perfect,imaculate the plastic pistons are designed for the aluminum caliper & fit tight
before you install check to see if piston will go in ,it is a tight fit & when you check the piston must be perfectly centered do not push it all the way in check caliper for score marks
the fiero store rebuild calipers are far superior to what you get from online rock auto parts price is not the object here some time you gotta pay
many rebuilt calipers are bad,read the "any one have success rebuilding rear calipers' -dennis la grua
you will have an easier time if your go to search feature at top of page & enter =""caliper piston"" then ""caliper plastic piston""
after you read the appropiate post ,, go to the ogre site & read his wise informative brake repair post
just click on the ,,Orange OGRE name in some of the post
the fiero store use to have the last supply of GM caliper pistons ,,they must all be gone by now but call & ask
if they have the GM pistons
the front calipers, when quality pads are installed like thermo quiets will stop the Fiero very well,,many/most
fiero owners install cheap pads !! a NO No ..do not scrimp cheap with your brakes , when you use top quality
brake pads,your Fierowill stop much quicker...flush out dirty fluid & make sure the wheels rotate with similar resistance
sop old dirty fluid outof master add clean & flush
A wheel that you can not get to equal the freer resistance of the oposite, is often a defective hose ,,
after a long drive you feel the wheels to see if one is hotter!
a small amount of grease on the bleed valve will pay dividend next time,,clean mating surface of bleed valve & do not
overtighten
you should have more success after reading the many post on calipers ,,when buying rebuilt?? go with fiero store
[This message has been edited by uhlanstan (edited 01-03-2014).]