The seals for the caliper piston are a square cut unit. When you apply the brakes the piston moves out and the seal distorts. When you release the pedal the pressure is not there and the seal goes to it regular shape, actually pulling the piston back a very small amount. The pads then are just above the surface of the rotor and ready for your next brake application.

 

Good writeup. One more thing I always do when it's apart is to put a thin coating of antiseize on the pad's backing everywhere it contacts the caliper, after cleaning the rust from all the places on the caliper where the pad rests. In the old days, they used that rubbery brake-quiet stuff, then found out that a bit of lubrication between the pad backing and the caliper was a better noise pevention than trying to glue the parts together.

 

Something extra I did when the wheel was off is spray a little PB Blaster on the rubber bushings of the upper control arm and shock absorber. They were a little dried out, and their website says it 'can restore some of the elasticity and softness'.
Don't know how much good it will do, but it only took a minute and didn't cost anything.

 

Hurst/Airheart makes calipers with retractable pistons they use them on dragsters and funny cars.

http://www.airheart-brakes.com/175qc2.html

But no, they just float on the surface of the rotor on our trucks.

Before I install my calipers I will break any glaze from the surface of the rotors with my 4" angle grinder and a flap-disk and then wipe them down using lacquer thinner, acetone or MEK, even if I just had them turned.

 

whare do anti rattle clips go

 

I'd use copper-based anti-sieze. It doesn't gum up under heat like the graphite-based stuff does.

 

I have found these specified for our 2WD front brakes in more than one auto-parts source and have yet to see any pictures or explanation as to where they go or how they should be installed.

Can someone please enlighten us ??


Thanks for reading.

 

Here you go,
You have been enlightened.

The end of the clip holds tension against the edge of the inboard pad.



Jim

 

Thank you, Mr. Jim Lane; picture appreciated.