Parts Guides

How camshafts wear and what to look for, with the brands worth specifying on rebuild.

Camshafts, bearings, oil pump, gaskets, head bolts, pistons and rings — the parts that determine engine longevity.

Why tensioners and idlers fail before belts, and how to choose the right replacement hardware.

How the auxiliary drive belt (serpentine belt) works, what fails, and the right replacement interval.

How chain guide rails crack, what to replace them with, and why they matter as much as the chain itself.

How timing chains stretch and tensioners fail, the engine families with known issues, and what to do about it.

What's in a proper timing belt kit, why each component matters, and how to choose between belt-only and belt-plus-water-pump.

Why timing belts are time-and-mileage-critical, what to look for, and the OE brands to specify.

Timing belts, timing chains, drive belts and the tensioner-and-idler systems that keep an engine in sync.