My engine making loud sounds. 2.3 engine. I changed the bearings in one of the pulleys, I checked the crank damper/pulley, there was no play in it.
After I changed the bearings in one of the pulleys, I left off the belt, no noise, when I put the belt back on it many noise.
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Make sure all the pulleys are lined up and the automatic belt tensioner is not off to the side due to a bad pulley bearings. Also check the crank pulley for walking outward and throwing the belt alignment off. If the crank shaft pulley appears to have moved out you will need to replace the crankshaft harmonic damper
Make sure that a) none of the pulleys are loose due to failing bearings b) that the belt tensioner is applying enough tension to the belt c) belt tensioner damper is working. First twist the belt by hand between the longest point between pulleys by about 90 degrees. This should be difficult to do if the tensioner is applying correct tension. Next while the engine is idling look at the belt alignment from the side to be sure the belt is not wandering backwards and forwards on the pulleys. Also see if the tensioner pulley is bouncing about. Perhaps best to again remove belt and wiggle each pulley by hand to detect any play in the bearings. If tensioner is bouncing it is likely the damper spring is not working as it should.
The bottom pulley on any engine is attached directly to the torsional vibration damper which is attached to the crankshaft. That pulley drives the serpentine belt and has no bearings. First thing you need to do is find out if the pulley bolts have become loose or if the damper on the crank is loose. If you find the pulley loose, if the bolt holes are not elongated, just tighten it back up. If the damper is loose, remove it from the engine (puller usually necessary) and inspect the crank snout and the alignment key for wear. Any damage to the damper requires that it be replaced. If the crank snout is severely damaged, that requires that the crank itself be replaced (very expensive).
You are the bestt person to identtify the source of the sound before we can go about a long check list. so open up the bonnet if you think it is from the engine side. Look for possible noise from
1. water pump
2. Alternator bearings
3. Idler pulley
4.AC clutch pulley
5. Belts..Tip Is: try to pour some water over the belt to confirm
6. main crank pulley
Hope you check this out. Helpful I hope. Good day
It may be a idler pulley bearing starting to freeze up remove the belt and turn all pulleys,power steering pump, alternator, idler pulley , etc. to find out if there is excessive resistance offered if so this is the culprit, on the idler pulley check the raidial play in the bearing by trying to move it by holding it with your hand and try to wiggle it gently back and forth same with the other (pulleys) check for loosness or play in pulleys bearings if everything checks out ok the battery may be running low and upon startup the alternator is under alot of strain to compensate for the recent drain on the battery while it is stressed to turn the starter to start car, your car may be drawing power from the battery as the car sits causing this condition disconect the pos. terminal of the battery and run a positive voltmeter wire to battery terminal then run negative volt meter wire to the now removed positive battery terminal cable set the voltmeter to dc there should not be 12 volts present if so there is and open circuit present drawing down the battery as the car sits while off.
Try removing the belt and turning each pulley by hand. If everything is smooth and free, with the belt still off, drive down the block once and see if the noise is there (this will eliminate all rotating accessories on the front). If you hear the noise, then there is a problem deeper inside. Oil pressure is good? Dont' forget when doing this, you will have no power steering, so be careful.