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I have a 93 Buick century and have recently developed a loud rattle come from along the belt line. I changed out the water pump cause that was leaking, then replaced the tensioner pulley, and rattle continued. I have now changed out the alternator as well and the rattle persists... what might it be? It's becoming rather tedious and expensive.

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Try tightening the tensioner pulley more

Posted on Jan 08, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: tension pulley for the Serpetine belt

The tensioner is the 3 1/2" pulley located between power steering pump and alternator down about 5" on front of engine. Does it have air conditioning?
If you need the diagram please post your email address and I will email it to you as I do not know how to post pictures on this.

Posted on Apr 27, 2009

  • 316 Answers

SOURCE: leaking antifreeze buick century 1998

Check your heater hoses. It sounds like your leak is a hose.

Posted on May 23, 2009

honeymokey
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SOURCE: 1991 Buick Regal 3.8L Belt Tensioner

Remove belt and unbolt center pulley bolt. I believe it's a backward theaded bolt. Turn to the right to loosen.

Posted on Jun 17, 2009

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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

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SOURCE: how involved is timing belt replacement for buick century

Your car does not have a timing belt,it has a timing chain.To remove the cover you have to remove the power steering pump and set aside,water pump,crank sensor,and crankshaft pulley.You might possibly have to remove the oil pan also.Hope this helps.Good luck.

Posted on Mar 20, 2010

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2 Answers

How do I tell if I need a new timing chain and or tensioner on my 1995 Buick Century special with a four-cylinder?


If u hear rattling noise when first starting. Also a new water pump and guides is recommended cause new chain will wear out the old. Git an xperiencd mech cause some wont aline the tining rite...if car doesnt run good...it may b off a tooth

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Squeak near serpentine belt


Check for a defective idler. It's a frequent failure item.

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1985 buick century custom


check each pulley for issues like rough surfaces pits and cracks..be sure most of the pulleys turn by hand to some degree with no resistance( or very little) the alternator, water pump , powr steering and ac clutch pulleys should turn free.. if not, find out why.. also check for almost ferfect alignment..they should all be straight in line with each other if not find out why..repost findings..

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I have a 1998 Buick Century and recently my temp gauge was spiking close to the red. It never actually overheated and after pulling the vehicle over for a few minutes the thermostat opened up draining my...


when the thermostat opened where did the coolant drain to? not understanding. did you put the thermostat in upside down blocking the cool will cause heater to blow cold air. if not, could be radiator itself.

Nov 16, 2012 | 1998 Buick Century

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I have loud noise coming from crankshaft pulley on 93 buick v-6 at idle mainly. What causes this?


Shiny belts will do this. Try taking a dry bar of soap, and touching it to bot sides of the belt. If the noise goes away temporarily, the belt has glazed from use, and is popping as it settles into the groove on the crank pulley. At higher speeds, the belt has to settle faster (it doesn't have as much time to rise up in the pulley from friction — a millimeter or less — then snap down into the pulley), and you don't hear the noise.

Jun 26, 2010 | 1993 Buick Century

1 Answer

Change water pump on 1999 Century Buick


GM Century/Lumina/Grand Prix/Intrigue 1997-2000 Water Pump - REMOVAL & INSTALLATION

3.1L and 3.4L (VIN E) Engines
  1. Disconnect the negative battery cable.

  2. Partially drain the cooling system into a suitable container.
  3. Remove the drive belt guard.
  4. Loosen the water pump pulley bolts before removing the drive belt. This should help keep the pulley from turning as the bolts are loosened.
  5. Remove the drive belt. Please see .
  6. Remove the water pump pulley bolts and remove the pulley.
  7. Remove the water pump bolts and separate the pump from the engine front cover.

To install:

1430070.jpg

Fig. Exploded view of the water pump and front cover arrangement-3.1L and 3.4L (VIN E) engines
  1. Clean all parts well. Use care when scraping gasket material from the front cover and the pump. Do not gouge aluminum parts. Clean the bolt threads well. The torque specification is low and if the bolt threads are dirty, an accurate torque is not possible and leaks are likely to develop.
  2. Using a new gasket, install the water pump to the front cover. Install the cleaned and lightly lubricated water pump bolts. Torque to 89 inch lbs. (10 Nm).
  3. Install the water pump pulley and bolts and torque to 18 ft. lbs. (25 Nm).
  4. Install the remaining components in the reverse order of the removal process. When refilling the cooling system, use the proper mix of DEX-COOL® and water. Check for leaks.

3.4L (VIN X) Engine
  1. Disconnect the negative battery cable.
  2. Partially drain the cooling system into a suitable container.
  3. Remove the coolant recovery reservoir.
  4. Remove the drive belt. Please see .
  5. Remove the pulley bolts and separate the pulley from the water pump.
  6. Remove the water pump bolts and remove the pump from the engine.

91d51fb.jpg

Fig. Exploded view of the water pump mounting-3.4L (VIN X) engine
To install:
  1. Clean all parts well. Use care when scraping gasket material from the front cover and the pump. Do not gouge aluminum parts. Clean the bolt threads well. The torque specification is low and if the bolt threads are dirty, an accurate torque is not possible and leaks are likely to develop.
  2. Using a new gasket, install the water pump to the front cover. Install the cleaned and lightly lubricated water pump bolts. Torque to 89 inch lbs. (10 Nm).
  3. Install the water pump pulley and bolts and finger-tighten the bolts.
  4. Install the drive belt, then torque the pulley bolts to 18 ft. lbs. (25 Nm).
  5. Install the remaining components in the reverse order of the removal process. When refilling the cooling system, use the proper mix of DEX-COOL® and water. Check for leaks.

Hope this help (remember comment and rated this).

Apr 04, 2010 | 1998 Buick Century

2 Answers

Where is the fuel pump oo 93 buick century v6


Fuel pump is in the tank, fuel filter is along the subframe rail by the rear wheels, either left or right side.

Mar 17, 2010 | 1993 Buick Century

1 Answer

Whining when not accelerating


Loosen and remove the Alternator belt which may be a serpentine belt and see if the whining goes away.
It could be the alternator or the water pump if it's driven by the same belt. It will go away while moving because the engine noise is usually negated by road noise etc but it's probably still there.

Jul 03, 2009 | 1987 Buick LeSabre

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Did you run out of oil?

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How to change a water pump on a 1999 Buick Century 3100?


the water pump on the 3.1 isnt to hard to change ...
  1. Disconnect the negative battery cable.
  2. Partially drain the cooling system into a suitable container.
  3. Remove the drive belt guard.
  4. Loosen the water pump pulley bolts before removing the drive belt. This should help keep the pulley from turning as the bolts are loosened.
  5. Remove the drive belt. Remove the water pump pulley bolts and remove the pulley.
  6. Remove the water pump bolts and separate the pump from the engine front cover.

Dec 09, 2008 | 1998 Buick Century

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