i took off my rear brakes because my ebrake wasnt working correctly and now when im trying to put the caliper back on, the caliper piston wont screw in. i can turn if fine but it is just not going in. any suggestions?

 

c-clamp it and have a friend watch the fluid level.

 

...................OH! you meant brakes.

 

if youre using one of those cheap block type caliper tools, then you have to push in while turning.

or go to harbor freight, and buy the better style one, that does that for you