Quote:
Originally Posted by cleavster
Thanks you for all your replies. I'll start by checking the timing chain stretch on the engine. Is the easiest way to check for stretch is to use a timing light and if it is off by 5 deg on M103 then it's time to replace it? Is this correct?
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NO. Timing chain & sprocket wear (incorrectly called "stretch") is checked statically.
Chain & sprocket wear is not in itself a cause of the subject noise; a hydraulic tensioner that relaxes can be a cause of the noise.