Auto Systems and Repair

The metal timing chain connects the camshaft to the crankshaft of the engine. It helps the crankshaft drive the camshaft.

Symptoms of Wear or Failure

• Engine may stall or run rough
• Noise in the front of the engine (a rattle or rumble, associated with engine speed)
• Check Engine Light may illuminate and set misfire, camshaft sensor, and crankshaft sensor codes

Related Repair Advice

• On certain engines, the water pump is driven by the timing chain. It should be replaced if the timing chain is replaced.
  
• When replacing a timing chain, replace the whole timing chain set, which includes all of the chains, the gear set, the tensioner(s), and the guides
• An engine may have multiple timing chains; replacing all of the chains and their related components is recommend if one chain requires replacement
• Using high quality, fully synthetic engine oil may extend the life of the timing chain and related components
• Sometimes, a defective water pump, a loose or defective harmonic balancer, a defective drive belt tensioner, or a cracked flex plate can exhibit symptoms that may be misdiagnosed as a worn timing chain assembly