Timing-chain guides often are the best indicators of the health of the timing chain, sprockets and the entire engine.
A timing-chain guide is designed to keep the chain in tension so it will not flutter like a serpentine belt when the engine speed changes.
To call some timing-chain guides plastic is not accurate.
The materials used by manufacturers are highly engineered resins and structural fibers. These materials are designed to withstand high temperatures and forces inside the engine. They’re also engineered to withstand engine oil and harmful vapors created by blow-by inside the combustion chamber. The engineered materials are also designed to endure thousands of heat cycles.
This video is sponsored by The Pronto Network.
