For 1990-2009 cars

Cause | Correction
--- | ---
Worn, damaged or stuck valve, carbon on the valve stem or valve seat. |

• | Inspect the valves.

• | Inspect the valve guides.

• | Repair or replace damaged components as required.

Worn, damaged or dirty valve lifter. |

• | Inspect the valve lifters.

• | Inspect the camshaft.

• | Repair or replace damaged components as required.

Worn or damaged camshaft lobe. |

• | Inspect the camshaft.

• | Inspect the valve lifters.

• | Repair or replace damaged components as required.

Worn, damaged or loose timing chain and sprockets. |

• | Inspect the timing chain and sprockets.

• | Repair or replace damaged components as required.