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dephaser pulley renault leguna mk 2 hi deos any body know if this can fail on imassions as mycar has 1 carage said it would be the dephaser pulley then onother garage said it is the pully as it deals with the timming can anyone help
 
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Hello and welcome to the Renault Forums :)

I suppose that it has some impact on emissions as the dephaser pulley advances and retards the inlet cam shaft. Thought if the pulley isn’t noisy ie making the engine sound like a diesel I doubt the problem be with the dephaser pulley? Unless the timing is out though it can’t be to far out as there valve and piston collision.

I would think the problem is more likely to lie with a faulty temperature or lambda sensor
 
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