Belts and Chains parts
Belts and chains synchronise the crankshaft with the camshafts so that valves open and close in time with the pistons, and drive the ancillaries such as the alternator and water pump.
On an interference engine, a failed timing component does not leave the vehicle stranded, it destroys the engine. Valves meet pistons and the repair becomes a rebuild.
Timing chains were once considered lifetime components. On many modern engines they are not: chain stretch, worn guides and failing tensioners are common at higher mileage, and a rattle on cold start is the warning.
Replace the tensioner and guides with the chain. They wear together, and the labour to reach them is already spent.
Belts and Chains parts we supply
- Belt CoversBelt covers are the plastic or metal shields that protect timing belts and chains from dirt, water and road debris, and prevent contact with other components.
- Drive BeltsThe drive belt, also called the auxiliary or serpentine belt, transfers power from the crankshaft to the alternator, water pump, power steering pump and air conditioning compressor.
- Timing Chain AssembliesA timing chain assembly is the complete set of chain, tensioner, guides and sprockets that keeps the crankshaft and camshafts synchronised.
Belts and Chains questions
How do I know if a timing chain is stretched?
A rattle from the timing cover on cold start that quietens once oil pressure builds is the classic sign. Timing-related fault codes for camshaft and crankshaft correlation confirm it.
Should the tensioner be replaced with the chain?
Yes, along with the guides. They wear as a set, the labour to reach them is identical, and a worn tensioner will shorten the life of a new chain.