Question about 1999 Buick LeSabre

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Take off the motor mount?

Do you have to take off the front motor mount to replace the drive belt?It is a 3800 Engine.

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No. You have to remove one bolt and stud. Go thru the wheel well and look to the right of the crank pulley. You will see an 18 mm nut. Remove the nut, then remove the stud with an inverted torx bit if it doesn't come out with the nut. Then remove the spacer that the stud went thru, and then the belt will come off.

Posted on Jul 09, 2010

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1 Answer

I have taken the oil pan bolts out and there is not enough clearance to remove the pan on a 2002 Buick Regal 3800 to replace the gasket. What steps do you suggest next.


Did you remove the catalytic converter, and motor mount? Lots of stuff has to come off to get this pan out. :o(

3.8L Engine
  1. Drain the engine oil.
  2. Remove or disconnect the following:

    Negative battery cable Throttle body air inlet duct Engine mount struts Accessory drive belt
  3. Install an engine support fixture.

    Catalytic converter from the right exhaust manifold Right front wheel Right side splash shield Oil filter and discard A/C compressor bracket and reposition the compressor Power steering oil cooler pipe brackets from the frame Engine mount bracket bolts Lower engine mount nuts Torque converter cover Oil level sensor electrical connector Oil level sensor
  4. Raise the vehicle and place a support under the frame.

    Right side frame bolts and loosen the left side bolts Engine mount and bracket Oil pan

Nov 21, 2010 | 2002 Buick Regal

1 Answer

Im going to have to change my serpentine belt on a 96 buick park avenue. 3800 non supercharged. Looked at it yesterday and it looks like I have to unbolt motor mount to get the belt off? Is there an easier...


yes.that is the only way.You have to unbolt the motor mount. To replace the serpentine belt on a V6 3800 series non-supercharged motor, you must jack up the motor and remove a motor mount. Before going any further make sure that the factory belt diagram sticker is still somewhere under the hood; if not, make a detailed diagram of the path of the belt. You must then use a breaker bar with a socket (I believe 13/64") and pull it toward the front of the car to release the belt tensioner. Put the new belt on, tighten it, put the mount back on, and lower the jack. Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

Aug 02, 2010 | Buick Park Avenue Cars & Trucks

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1998 buick park ave 3800 engine belt diagram


what is the bracket called that mounts to the front of the motor and also to the wheel well

Jun 15, 2010 | 1998 Buick Park Avenue

1 Answer

There is no diagram for replacing my broken serpentine belt on my 1996 regal 3800


On the bracket that attaches the motor mount to engine, the lowest nut and stud must be removed (can reach by removing wheel and from bottom). Then remove spacer (that goes around stud), install belt then reinstall spacer, stud and nut.

Apr 22, 2010 | 1996 Buick Regal Olympic Gold

1 Answer

Do i have to disconnect motor mount to replace my drive belt


Depends on the motor. If there is a mount on the passanger side that the belt goes around then yes. Don't fret though, easy to get around. Use a jack and a piece of wood on the oil pan to support the motor so you can remove the motor mount to remove the belt. Again, this is on SOME gm motors not all. On the others the mount isn't in the way at all.

Jan 24, 2010 | 1995 Pontiac Bonneville

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3800 supercharged engine belt rotoring diagram


the broken pulley is more than likely the cause of the break and yes you need it or you can do more damage

Jan 15, 2010 | 1996 Buick Riviera

1 Answer

1999 buick park avenue ultra motor mount and supercharger belt replacement


  1. Remove the engine mount to engine mount bracket nuts. Important: Ensure that the wood block extends past the width of the oil pan in order to avoid damage.
  2. Use a jack with a block of wood on the jack under the oil pan in order to support the engine.
  3. Remove the engine mount bracket front upper and lower nuts.
  4. Remove the engine mount bracket front upper and lower studs and spacer.
  5. Lower the engine as necessary and rotate the tensioner to remove the drive belt.Remove the supercharger belt.
  6. Reverse For INSTALATION

Dec 09, 2009 | 1999 Buick Park Avenue

1 Answer

How to replace accessory serpentine belt on 1996 Riviera


The supercharged 3800 engine uses two accessory drive belts. The outer belt drives the supercharger. The inner belt drives the generator, power steering pump, coolant pump and air conditioning compressor. All driven accessories are rigidly mounted to the engine. Drive belt tension is maintained by the spring loaded belt tensioner. Each belt has its own tensioner.
Remove: Place a jack with a block of wood on it under oil pan to support engine. Caution : Be sure the wood block extends past the width of the oil pan to avoid damage. 
Torque axis engine mount bolt where it connects the mount to the engine mounting bracket. 
Electrical connector from crank sensor. 
Engine mounting bracket lower stud and lower engine to allow stud to clear frame rail. 
Raise engine and reinstall bolt into torque axis mount. Lower engine to allow spacer to be removed. 
Belt(s)

Istalling: Belt. 
Spacer. Remove bolt from torque axis bracket and lower engine. 
Electrical connector to crank sensor. 
Mounting bracket stud. 
Raise engine and install torque axis mount bolt. 
Tighten bolt to 87 Nm (52 lb. ft.) 

Good luck and hope this helps.

May 05, 2009 | Buick Riviera Cars & Trucks

1 Answer

1997 Buick Park Avenue


This is the diagram but you should have factory belt diagram sticker is still somewhere under the hood
If not:
http://www.mvreader.com/multiview/dayco/zoom.php?zoom_item=C0001D&l=n&catalog=auto&category=
To replace the serpentine belt on a V6 3800 you must jack up the motor and remove a motor mount. You must then use a breaker bar with a socket (13/64") and pull it toward the front of the car to release the belt tensioner. Put the new belt on, tighten it, put the mount back on, and lower the jack.
Driving without a belt can cause the motor to overheat, will cut power steering, and will not recharge the battery, so you should probably get a tow
Good Luck

Jan 08, 2009 | 1997 Buick Park Avenue

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