Tensioner making high pitched squeak while eng is running.
I have a 2002 hyundi 350xl and the engine belt tensioner is squeaking i just had a new alternator installed approx 1 yr ago. i also noticed that the eng plastic shroud is rubbing on one of the pullys.next to the tensioner.what could be the cause of the problem?
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Re: tensioner making high pitched squeak while eng is...
It sounds like the tensioner bearing is bad. Loosen the belt and then wiggle the pulley. If it's loose side to side it's going bad. Luckily these are cheap and easy to replace. Good luck. Please rate me so I know how I'm doing. Thanks.
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at night, it is cold, your drive belt gets worn other time, when it's cold at night it doesn't get much grip, so it squeaks, what you can do is tighten it up, find which one is loose by pressing on them. The concept of belt tensioning is simple, look it up, on all cars work the same.
check for play in the distributor sometimes the slop will make the pick up window under the cap will hit the distributor cap , the squeaking noise may be your belt or tensioner pulley bearing the knock can also come from a bad tensioner as well .
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.
If you take the belt off and there is no noticeable in/out, up/down, or side to side movement of pulley and there is no noise when rotating, a new belt may be all you need. Make sure you check ALL of the other belt driven components including idler pulleys and belt tensioner pulley. A worn tensioner can squeak also.
fan belts squeak for several reasons 1 incorrect belt for pulley.2 belt running on the botton of the pulley and worn pulleys. To check measure across the top part of the pulley and the widest part (back) of the belt should be the same if not marginally bigger. V belts work best at t5he top of the pulley.If you can see that the pulley is polished at the bottom the belt is slipping and not driving Check if the pulley sides where the belt runs is not stepped from wear. Recheck the tension as new belts stretch slightly. If you have a multi groove pulley check the tension setting. As a last resort CRC make a product that is used to stop belt but it is best to fix the real fault first
Check your tensioner pulley -- if you do not have enough tension on the serpentine belt, it will slip on the pulleys and cause a squeaking noise (very loud and high pitched). if you push on the serpentine belt with your hand, it should not more more than about an inch -- if it does, you are low on tension. If it does not have any give at all, then you have too much tension, and one of your pulleys might not be turning properly, causing that same noise. If your tension is right, and your car is still making that noise ... and belt dressings (the spray you probably used) are not working to stop it, then it might be a piece of rubber stuck on one of the pulleys, but this usually will not make that sound ... just smoke and a burned rubber smell.
The squealing after starting is usually a loose belt on the alternator. The alternator has to do heavy charging after starting the car. If the belts really have been changed and properly tensioned then its hard to guess what might be wrong. As far as "heavy fumes" when the car is started ... burning gasoline makes water vapor and you can see it when the engine is cold. If its really dark as in black or in that range then it would seem the engine is running very rich when cold. Does the car burn a lot of oil?
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.
there is no spring tensioner on some of the 3.0 engines. See instructions below. I will paste a pic on the version that DOES have a tensioner at the bottom of this post.
3.0L Engine-Except SHO ALTERNATOR BELT WITHOUT AUTOMATIC TENSIONER
Loosen the adjusting arm and pivot bolts.
Turn the alternator belt adjusting screw counterclockwise until the old belt can be removed.
Remove the belt.
Install the new belt over the pulleys. Check that all the V-grooves make proper contact with the pulleys.
Adjust the belt tension, then tighten the adjusting arm and pivot bolts.
3.0L SHO Engine ALTERNATOR BELT
See Figure 2
Loosen the nut in the center of the idler pulley.
Loosen the idler adjusting screw until the old belt can be removed, then remove the belt.
Install the new belt over the pulleys in proper contact with the pulleys.
Adjust the new belt to specifications as follows: Turn the idler pulley nut to the right to tighten the belt to a specification of 220-265 lbs. (980-1180 N). Torque the idler pulley nut to 25-37 ft. lbs. (34-50 Nm).
POWER STEERING AND AIR CONDITIONING BELT
See Figure 2
Remove the alternator belt.
Loosen the nut on the tensioner pulley.
Turn the belt adjusting screw on the tensioner counterclockwise until the belt can be removed, then remove the belt.
Position the new belt over the proper pulleys, making sure the V-grooves are properly seated.
Install the alternator belt.
Adjust the power steering and air conditioning belt to a specification of 154-198 lbs. (690-980 N) with a belt tension gauge.
Adjust the alternator belt.
3.0L Engine (Except SHO) and 3.8L Engine VEHICLES THROUGH 1993 WITH AUTOMATIC TENSIONER
See Figures 4 and 5
Insert a 1 / 2 in. breaker bar into the square hole in the tensioner.
On the 3.8L engine, the tensioner has a1/2in. square hole cast into the rear of the tension arm directly behind the pulley. On the 3.0L engine, the1/2in. square hole is cast into the spring housing on the front of the tensioner.
Rotate the tensioner clockwise and remove the belt.
Fig. Fig. 5: 3.8L belt schematic-1993 shown
Install the drive belt over all the pulleys, except for the alternator pulley on the 3.0L engine for vehicles through 1992, or the idler pulley for 1993 3.0L vehicles.
Rotate tensioner counterclockwise and install the belt over the alternator pulley. Make sure that all the V-grooves make proper contact with the pulleys.
On the 3.0L engine, install the alternator belt for vehicles through 1992.
For 1993 3.0L vehicles, install the drive belt over the idler pulley.