nerometer.blogg.se - Timing chain vs timing belt

If the timing chain wear is great enough so the tensioner can no longer compensate for the slack, the noise may continue even after warming up. If the engine is equipped with a hydraulic timing chain tensioner, the noise may disappear or lessen as the engine oil warms up and the tensioner removes some of the slack. Excess slack in the timing chain can cause a rattling sound or even a clanking sound if the slack is severe enough to cause the chain to contact the timing chain cover. Timing chain noise is commonly most noticeable during cold startup of the vehicle when oil pressure and oil flow is at its lowest.

Older, pre-VVT applications will generate engine rattle.

Later model VVT applications will generate engine codes and check engine lights prior to engine rattle.

Signs a timing chain needs to be replaced include: Since the timing chain can go bad and will need to be replaced, it is important to be able to recognize the symptoms and have it repaired before it fails completely. If driving an older vehicle, or one with close to 100,000 miles, it is recommended to look for symptoms of the timing chain going bad or failing. Issues with the chain are common in higher mileage vehicles.

The timing chain normally needs to be replaced between 80,000 and 120,000 miles unless there is a specific problem. When does a timing chain need to be replaced? Every time you use the engine, the timing chain is in use. The chain is located inside of the engine and needs to be lubricated by the oil in the engine, making oil maintenance important as well.

A timing chain synchronizes the rotation of the crankshaft and camshaft(s) ensuring proper timing and allows the engine’s valves to open and close during each cylinder’s firing.