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Piston Operation:

An engine part that reciprocates in the cylinder and transfers the force of the expanding gases via the piston pin and connecting rod to the crankshaft.
A round, caliper component in a disc brake that is moved outward by fluid pressure to press the pads against each rotor face.
An aluminum or sintered-iron component of a drum brake inside the wheel cylinder that supports the cylinder cup.
That part of a compressor that is driven by a crankshaft to compress vapor.

How To Instructions:

Inspect - Check for obvious problems.

Test - Give it an in-depth diagnosis.

Service - Do the jobs that fix your car.

Replace - Out with the old, in with the new.

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