Pulley on crankshaft is rattling bad is there a bearing

I would need to hear the those.

sounds to me from the brief description like you have either a water pump rattling, or a timing chain coming slack. Is the noise coming from the alternator? Never grease pulleys, ever. also the stop squeak spray is bad for your belts. Don't know why they even sell it. If you listen carefully you may be able to pin point the rattle. Is this a tick tick tick, or a rattle rattle rattle? Does sound like a water pump rattle or timing chain slap though. Hope this helps

I don't think a bad oil pump would make that racket. It could be your crankshaft main bearings or rod bearings (also on the crankshaft). If you're sure it's coming from the engine, I would take it to a shop for someone to listen and try to determine what it may be. If it is the bearings, it is major rebuild time.

Hello: Remove the serpentine belt, see if the waterpump pulley wobbles/makes noise when you spin it. If thats not it then start the engine, belt still off see if noise is there also while engine is running see if vthe crankshaft pulley wobbles. Also check the A/C compressor pulley (engine off, belt off) spin it by hand and check for noise and wobble. If all the previous is ok then it could be the balance shaft front bearing and or the timing chain.

Rattling is most likely the original problem. I would say you have a bad bearing in one of your pulleys. Usually the A/C compressor one causes a loud rattle when it goes out, sometime the alternator one will also. Release tension on belt and try to wobble pulleys by hand to feel for slop in pulley bearings. If you find any significant slop, the pulley baering is most likely bad. (Your tesioner pulley itself can also be the culprit) sloppy pulley= bad bearing = drag= load on engine =bad idle and or kill motor.
Mike

what engine? Please rate if this helps. Took a lot of time to dig out.

here's 2002 3.0L 2 valve



Item Part Number Description 1 10346 Generator pulley 2 8678 Belt idler pulley 3 3A733 Power steering pump pulley 4 8620 Drive belt 5 2E884 A/C clutch pulley 6 6B209 Drive belt tensioner pulley 7 6312 Crankshaft pulley 8 8509 Water pump pulley


4 valve



Item Part Number Description 1 3A733 Power steering pump pulley 2 8620 Drive belt 3 2E884 A/C clutch pulley 4 6316 Crankshaft pulley 5 6B209 Drive belt tensioner pulley 6 10344 Generator pulley

water pump 4 valve



Item Part Number Description 1 6A359 Camshaft drive pulley 2 8K543 Drive belt 3 8509 Water pump pulley 4 8W508 Drive belt tensioner pulley

Sounds like a rattling noise is a bearing going bad to me.

If disconnecting the belt gets rid of the rattling, I would check for binding or loose pulley bearings.

if rattling sounds like you have a bad pulley bearings on pulley going out pop hood and look at belt with running see if it is moving correctly not going in a back and forth motion like warped llook at pulleys see if they are displaced

this could be a bad pulley or alternator, you will need to remove the belt and spin the pulleys by hand to see which one is making noise, it could also be the ac compressor pulley, start there.

Yes,it can,if the bearings in the water pump are shot.