Technical JTD noise from engine

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Technical JTD noise from engine

edwin884

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Dec 26, 2011
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The noise is coming somewhere from the cam belt. It only appears when the revs go up, from about 1200rpm, no buzzing noise on idle.
What could it be?
 

You had better hope it’s not the cam belt or tensioner aboutto go bang.
 
The cam belt and the tensioners are only 2 months old (SKF)! I found on the net that it could be the tensioner of the belt that drives the alternator!
 
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