I am replacing a timing belt on Saturn vue 2002 awd v6..which pulley is the tensioner pulley? Does the crank pulley come off or do I need a puller?

You replace the water pump,pulleys & tensioners,
as a kit,when the belt needs to be replaced

I would assume you didn't follow the instructions that
came with the belt,to time it properly

Generally you make sure you have a diagram of how the belt is routed around the pulleys, then move the spring loaded tensioner pulley away from the belt to remove it.

need to know what engine you have? most likely you'll have to remove timing cover as the water pump is driven by the timing belt..while your at it i would HIGHLY recommend replacing the timing belt, timing belt idler pulley and the tensioner pulley..

the 75 may work but the belt may be loose if the tensioner doesnt pick up the slack, i dont understand, you said this was not an aftermarket part so its a dealer part, sre you sure you are asking for the right pulley,okay i just looked at a diagram and theres only one pulley and thats for the tensioner theres no idler pulley on the v6 engine i think thats why you are getting the wrong part.heres a diagram to show you, maybe ask for the tensioner pulley.i jsut looked up part and the pulley i looked at was 76mm ,you can also buy the whole tensioner asm, but if its just the pulley you need then that doesnt make sense,try to put the belt on and see if its tight is so use it, i often run into this problem and thats what i do, but im confused that the dealer cant get the part right, something isnt right, you know i just looked at the measurements and that not right, i have never seen a pulley that big on the tensioner, i think its another pulley, like for the power steering,look at the diagram i sent and i will label each pulley and see if it the same one you are looking for, i think you will find its not the tensioner pulley and you dont have an idler so its another pulley good luck i hope this helps,

how do I loosen tension for serpentine belt

it could be a rocher arm, or it could be the timing chain tensioner, mostly it the rocker on those they make it sound like the motor is going to blow, to have the rocker checked and adjusted i beleive is about $180.00. good luck.

I have a 2002 saturn vue. Same thing..sounded like a jet engine ...loud humming as I accelerated . It got increasingly worse. It turned out to be the front wheel bearings. Replace them, now the noise is half as loud...have to do the rears also! 93,000 miles on it. Also, don't forget to replace the timing belt. It it goes too long and breaks, it will trash the engine...

the water pump is driven by the serpbelt,,it located under the timing belt cover,,,about in the center of the timing belt area,,easy to do,just dont get any coolant on the timing belt,,,if you hav e more than 75k on the car replace the timing belt too before it breaks

how to replace alternator on 2003 saturn vue 3.0 v6

Correct, but it is sometimes more difficult without help and the proper tools. First make sure it is not just the belt squealing.