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I have a 1999 Buick LaSabre 3800cc engine V-6 with 130,000+ miles on it. It recently developed a unusual sound which seems to come from the front of the engine compartment (belt area). I had a very good mechanic check the following with the belt removed: water pump, power steering unit, ac unit, idler, tension pulley and alternator without success. The sound is a roaring, grinding, clicking, tinning sound. He also changed out the starter but replaced it after it did not change the sound. The sound first was noticed when my wife tried to start the engine and it would go away. It now is constant. When the tension mechanism is lifted (pressure taken off the belt) the sound goes away. The mechanic suggest that I may have a broken crankshaft pulley but there does not seem to be any evidence (wobbling, metal shaving, etc) in that area. The crankshaft bolt is tight. Any suggestion would be very helpful.

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  • Cars & Trucks Master
  • 20,706 Answers

Fire your mech,
then find a ASE mech (see sleeve?)
he is incompetent.
this is the proof
When the tension mechanism is lifted (pressure taken off the belt) the sound goes away.

no real mechanic ignores this simple hard fact.
take to any ASE show him this check above,
he will find it , in under 1hr. I promise you.

Posted on Oct 15, 2013

Testimonial: "Competency varies by degrees of intelligence not licenses. We have concluded it is the harmonic balancer (Buick's have a reputation for this kind of problem) or the bolt and key to the crankshaft pulley. This was his diagnoses and I respect him for his honesty. Most mechanics will replace this and that until they eventually solve the problem many dollars later. He chose to say "I'm not sure so I suggest you seek another opinion". ASE does not mean anything but a process has been followed to get a license. Honesty is still the best policy."

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Posted on Jan 02, 2017

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  • 39 Answers

SOURCE: Bearing

check your harmonic balancer they where notorius for going bad on buicks.Remove the belt and grab the balancer and see if you can rock it back and forth by hand. if you can its the balancer

Posted on Sep 21, 2008

kevinpenney
  • 2 Answers

SOURCE: power steering problem, noise coming from engine, 97 montero

Your experiencing the same thing my 02 is experiencing- your crankshaft pulley is slipping on the crankshaft. It only does it under load, i.e. turning steering wheel(loads the power steering pump) running heater blower on high with headlights on (loading the alternator) or running the a/c with blower (loading the a/c compressor and alternator). Turning off all lights, blowers, ac, etc and allowing the car to idle should kill the slipping until loaded again. This problem is very serious and very expensive if your don't catch it early. It require repairs ranging from tightening the crank to pulley bolt, to replacing the pulley AND your crankshaft if it is allowed to continue. if you cannot get it serviced immediately then do your best to keep loads off of your belts by driving with the blower off, A/C off, and lights used only when necessary. Also try to avoid extreme tight turns which load your power steering pump. Your repair, if not done asap, will cost you upwards of around $3k since the motor must be removed and completely torn down to replace your crankshaft and pulley. I would seek a tech who will exhaust every other method- i.e. sleeving, welding, etc. to effect a repair. Just don't put it off because it will only get worse...

Posted on Jan 05, 2009

  • 2 Answers

SOURCE: there is a clicking sound

i agree with the previous person the boots don't have to be ripped for the cv joint to be bad

Posted on Sep 26, 2009

  • 1 Answer

SOURCE: noisy water pump pulley,alternator pulley..timing belt tensioner

I have a 1995 xj6....same problem. I replaced the belts, water pump, and the alternator. Still does it. As I play with the tension on the belt (belt that drives water pump, alternator) it goes away and comes back. If I remove the belt, the metal to metal screech stops. I then, with just the belt, turned the main pulley on the front of the engine, and there was the sound! The main pulley has 2 belts that run on it. Also, 2 pulley tracks. They SHOULD move simultaneously and be super meshed. But the rear one moves on its own under tension until it warms up and I guess, the bushing maybe expands. Now.....how do I fix it??????

Posted on Nov 17, 2009

lindsay836
  • 677 Answers

SOURCE: I got a 99 Chevy Malibu ..the problem is i just

The power steering has nothing to do with the timing belt replacement.
If you here a rrrrrrrr.....rrrrrrrrrrrr..... when you are steering it is because you power steering fluid is low.
You will find the power steering pump on the left side of the engine as you stand in front of car.
Open the cap and check the fluid.
Your pump may be bad, and that is where you hear the noise.
As far as the timing belt being loose ect, it is possible, but there is a self adjusting pulley on it, and if the tension is wrong, it will break, or fall off.
Please let me know what you find.

Posted on Feb 12, 2010

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