Question about Saturn SL1

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Strange rattling sound with car in gear at idle with ac on. The noise goes away at any speed above idle Tensioner and belt changed 15000miles agoe.

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Heat shields on exhaust or guts of catalytic converter

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Replace the belt tensioner. Not just the pulley but the complete tensioner.

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If idle pulley was replaced and still noise what is it


Well a place to start is pull off the belt and spin the Idler, Tensioner, AC, Alternator, and Power steering, Smog pump (if equipped) pulleys all should spin easy with no noise. Does the sound go away or change when turning on the AC? Also start the car with the belt off to make sure the noise is not coming from the motor. If noise go's away then it has to be one of the items I mentioned above. Cost will be depending on location and type of part gone bad.

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Check ALL of your pulleys. Look closely at the tensioner pulleys with the belt off. If you feel any slack at all, replace it soon.

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it could be a wrist pin, and im not sure if those amc's had hydraulic lifters but sometimes with old lifters when the oil pressure is lower at an idle the lifters arnt filling up all the way so they develope a little valve lash, and when the rpms are raised the oil pressure raises and fills the lifters. you could try chasing the noise down with an automotive stethoscope.

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When car is put in gear and at idle i hear a loud knocking. When i accelerate it stops


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JUST CHANGED WATER PUMP, POWER STEERING PUMP, BELT TENSION ASSEMBLY. EVERYTHING OK FOR ABOUT 2 WEEKS AND NOW THERE IS A KNOCK OR RATTLE COMING FROM THE FRONT OF ENGINE. WHEN BELT IS REMOVED THE NOISE GOES...


the damper could be bad if it's the type with the rubber inbetween the pully and the the rest of the damper. check that and see if it is separated. if not looks like your crankshaft bearings could be bad

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Engine rattle


Does it only do it with the a/c on or does it do it with it off and in gear. If it does it with the air off and in gear the the problem is possibly in the tranny. If it only does it with the air on the possibly another pully in a bind causing the rattle possibly water pump.

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Engine noise at cold start-up.


Sounds like your oil pump inside the engine is not pumping oil fast enough when you start your vehicle its common problem for mitsubishi motors my car does the same thing.

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Nov 04, 2008 | 2002 Mitsubishi Montero

1 Answer

Engine whine noise


most likely a belt tensioner or pulley take some penetrating oil and spray the center of each pulley one at a time if the noise stops you got your bad pulley if not take the belts off the motor and spin everything by hand to feel or hear any grinding noises if you still don't feel anything run the motor (not for more then a minute) with the belts off and if the noise is still apparent your timing belt needs to be checked right away! it may be on its way out and if that goes your motor is toast good luck and please rate -jeff

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Rattling post 2000 rpm in every gear


Sounds like the timing belt tensioner. I have that problem. Rattles at low rpm, goes away as you acceralerate. Looking to have timing belts changed and tensioners replaced.

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