Question about 2002 Hyundai XG350

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Alternator squeaks Have replaced alternator and tensioner. I have had it at three different mechanical shops. They put on new belts even a gator belt and it still squeaks. I am afraid it will break down and the belt will shred.

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  • kathylonnie Dec 21, 2008

    I hadn't thought of that and will take it back to the shop to have it checked out. Thank you very much for your feedback. I didn't think of it cause the car has only 62K miles on it.

  • glomerulous May 05, 2009

    I've had the same problem...I was told it was a common problem. That the type and design of the belt allowed dirt to be trapped in the belt grooves causing belt slip and the squeek. I always notice it more during winter after driving on dirt drives or muddy roads.

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Had this problem with a mitsubishi and it was partly because the belt was either to loose or tight. The main problem was a broken engine mount allowing the engine to move.

Posted on Dec 21, 2008

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1 Answer

Makes squealing noise


You need to check the belt that drives the alternator for proper operation. The belt may be old and worn, or a pulley may be not freewheeling, but seized or with a bad bearing. Possibly the tension on the belt is too loose from a worn out tensioner.

First, spray a little water on the belt with engine running and see if noise goes away, possibly a worn belt. Pull the belt off and check all pulleys. Spin them by hand and see if spins easy, no rough feeling or a catch when spun. Check alternator pulley, idler pulley, tensioner pulley, PS pump pulley and A/C compressor pulley-check them all for free wheeling. If good check the tension on the belt when installed. If unsure, have a mechanic check tension with a belt tension tool.
If belt is good and pulleys good, check alternator output with a voltmeter on the battery with engine running. If voltmeter is below 13.5 volts, the charging system is still not working properly. Have it checked out.

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I bought a 67 Mustang 200ci today and popped the belt on the way home. I replaced the belt but found no legit way to properly tension it, any suggestions? It squeaks like crazy


Belt tension is adjusted by moving the alternator away from the water pump. Loosen both alternator bolts (don't remove them) and place a pry bar or wooden handle between the alternator body and the engine block. GENTLY apply pressure to move the alternator away from the engine - when the belt has less than 1 inch vertical play, tighten the alternator bolts while maintaining tension on the alternator. If proper tensioning doesn't solve the squeal, then I would suspect the new belt is contaminated with oil or grease.

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I bought a 67 Mustang 200ci today and popped the belt on the way home. I replaced the belt but found no legit way to properly tension it, any suggestions? It squeaks like crazy


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1. Remove the plastic air intake system which includes the air filter, 1 vacuum hose, the tube that runs to the carb, the tube that runs off to the left. There are three bolts that hold the bottom of the air filter housing on. Most of this system is a snap together assembly. Just pull it apart.

2. The alternator will have two bolts on the front bottom. The left one is a double sided bolt and the right one is a pass through bolt with a nut on the back. Stick a wrench or a short socket wrench on the nut behind the alternator and remove the pass through bolt from the front. Then remove the double sided bolt from the left side.

3. This leaves the alternator loose and being held by the belt. remove the belt from the alternator and wiggle and jiggle the alternator out of the mounting area (very tight squeeze to get it out). You can put a larger size can of fruit or something in the place of the alternator to hold the belt in place so you can remember how it looks.

4. You will need to loosen the belt tensioner to put the belt on the new alternator. Remove the can of fruit if you chose to do that but be careful to not accidentally remove the belt from the 5 or 6 different places it passes through. Place the new alternator, put in the bolts and tighten. Loosen the tensioner and put the belt on. Tighten the tensioner and adjust as needed. Replace the entire air intake system by snapping it all back together and bolting it in one piece at a time.

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There is a pulley out of alignment. Only 1/8th inch out will cause a serpentine to sqeak.

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