Question about 1998 Pontiac Bonneville

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Check engine lite has come on, noise coming from right front engine at bottom where lowest unit on serpentine belt is. There is a small 1/16" gap in the pulley on that outside of that unit. 98 Pontiac Bonneville 6cyl 145K miles manual tran

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  • phootball54 Jun 27, 2009

    What is the unit that is on the bottom? Is it releated to the air conditioning? Because the my wife says the air conditioning quit working at the same time the noise started. The car seems to run just fine.

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You have a bad A/C compressor unfortunately this is not a DIY kind or problem
you are going to need a mechanic to replace your A/C compressor the accumulator drier and the orifice tube.

make sure he change the orifice tube and the accumulator drier
or you will have the same problem again.

please don't give me a bad rating just because is not what you wanted to hear.

Posted on Jun 28, 2009

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Hi,

How long have you ran the engine ? I know that they will run rough and sometimes make strange noises for a few secounds or a little bit untill everything get oiled up again. I would make sure all the push rods are back in the right place and that all the lifters are tight.
To be sure, have your engine tested for compression leaks. Fame !

Posted on Jun 27, 2009

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WHAT IS THE LIKELY CAUSED OF A LOUD SQUEALING NOISE COMING FROM THE ALTERNATOR SERPENTINE DRIVE BELT SYSTEM ? IS IT THE ALTERNATOR OR SERPENTINE BELT?


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Engine screeches when running. revving the motor makes it stop momentarily


Could be a belt screeching. Fan belt, A/C belt, Serpentine Belt, alternator belt, etc. Easiest way to isolate which belt is to open the hood and use your ears to see where the screeching is coming from. Left, right, front, behind the engine? Spray some WD-40 on the belt you think is making noise and if it quiets right away, then that is the belt making the noise. Either the tensioner needs adjusting or the belt needs replacing. The WD-40 does not hurt the car, it'll start screeching again in a few days when it wears off.

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Bad oil pump ?


Turn your A/C off, the compressor can make noise if bearings are dry or system is low on compressor oil.
Remove your serpentine belt. Turn pulleys by hand to check for roughness. Bearings in those pulleys routinely go bad.
You may get computer warnings with the following test, but with serpentine belt removed, run engine for 2 or 3 minutes. Do this on a warm engine after serpentine belt is removed. The warm oil will not mask the problem like cold thick oil can. Noise generated means problem is internal.
If this is a stick shift transmission sometimes the clutch bearing can make noise and is a sign that bearing is bad.

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How is the best way to replace a serpentine belt on a 2005 kia sorento


First remove the engine plastic cover by removing the bolts that hold in. Then loosen the nuts at the front of the AC Belt and Power Steering Belt. Now use a Socket set and loosen these two belts by turning the tension adjustment bolt, Anti-Clockwise.

You have to remove the first two belts (AC & Power Steering) before reaching the Serpentine Belt.

Now loosen the nut on the front of the lowest pulley before loosening the serpentine belt.

To loosen the serpentine belt, you could either remove the metal skid plate at the bottom of the engine by turning the tension adjustment bolt, Anti-Clockwise or reach down from the top and loosen it with the socket set ( quick & easiest)

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Whining sound and lost acceleration. Sounds like noise coming from pully? Whining increases when pressing the gas.


The lost acceleration is of major concern. Maybe you have lost your water pump. It would work great for a few miles when you start out and then gradually heat up and loose performance. The fluid would eventually boil over? Maybe a bearing on the camshaft is expressing it's discontent and causing extra load for the engine to overcome. Try to determine where the noise is coming from.
The serpentine belt connects the alternator, water pump, power steering, front timing pulley, fan, and front timing pulley. All these components generate a parasitic load on your engine. If the engine has to work harder because of increased load it could be any of these components. I'd definitely check the water pump listening for noise while running. Look for obvious things related to the belt and its' components.
Check the serpentine belt for wear. May indicate pulley misalignment or wear. There exists two idler pulleys that have small bearings that wear out and squealing noises. Check those for wobble with the tension off the belt. They are pretty cheap so replace them if any concern at all.
Power steering pumps cavitate and make a high pitch gear whining sound if fluids are low or gears warn of. Check the fluid and top off to the correct level.
Best wishes,
TF

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Hello


Belt tensioner puley.Sience you said timing belt was done , that means water pump was replaced too.
Just had same thing in the shop , weard noise hard to tell were from , happened to be a serpentine belt tensioner puley.Can't replace puley only , it comes as assembly.

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2002 Olds Intrigue GLS makes a high pitched whinning noise while the engine is running. However when I give it gas it quiets down until I let off. I am not sure if it is the Serpentine belt or a...


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Belt whines and sounds like a bearing going,WD40 takes noise away


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