Question about 2003 Chevrolet Silverado 1500

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Air works @idle but breaks tensioner and rattles @high rpm

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The only way a compressor could cause this problem with your truck would be if someone added too much refrigerant oil or the vanes in the compressor are wearing out.(excess refrigerant oil causes the compressor to drag down harder as with the worn vanes) Disregard the refrigerant oil if the system has not been recharged or changed.

Posted on Sep 04, 2009

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I have a 2005 v6 triton. It has a load rattling noise on idle and seems to go away at around 1500rpm. It is not always there and doesn't matter whether engine hot or cold.


if on a V 6 petrol @ 1500 rpm
could be the knock sensor
distributor timing might be out
or serp belt tensioner bearings

if a diesel i would expect a rattle@1500 rpm

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Idle Rpm Too High.


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well if it is the engine i am thinking of that has the small ac belt with the little tensioner on the passenger side bottom area it is most likely the ac clutch is locking up turn the rear air of have some one rev the motor watch the tensioner if it is moving alot banging into another part making the rattle then you might get ready to have to replace the compressor when it gets worse they usually break the tensioner.

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