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Q: Timing chain is rattling.

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My timing chain rattles for about 2 to 4 seconds upon startup.

The noise you are hearing is the timing chains rattling till the oil pressure builds up and applies pressure to the timing chain tensioners. The manufacture has come out with updated parts to correct the problem. The problem is this is a major repair to remove and replace the tensioners for the timing chains. I recommend you find a good qualified technician to handle your timing belt repairs.

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