How to change water pump

Tiny
MADMIKE1999
  • MEMBER
  • 1998 BUICK PARK AVENUE
Six cylinder front wheel drive automatic 153,000 miles.

How do I loosen the motor mounts in order to change water pump in the car listed above that has an Ultra Supercharged 3.8l engine? Also, how do I loosen bolt on bottom left of water pump behind the pulley?
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Tuesday, May 27th, 2008 AT 7:59 PM

21 Replies

Tiny
KEN
  • ADMIN
Hello,

Here is a guide to let you know what you are in for when doing the job and with diagrams below - click to enlarge.

https://www.2carpros.com/articles/water-pump-replacement

Here is the belt routing:

https://www.2carpros.com/diagrams/buick/park-avenue/1998

I have found diagrams for you (below) of what it is like on your car. Please let us know if you need anything else to get the problem fixed. Cheers, Ken
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Wednesday, July 19th, 2017 AT 3:07 PM
Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 1994 BUICK PARK AVENUE
  • 123,000 MILES
How do I remove the water pump from the motor?
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
JDL
  • EXPERT
The information I looked at was for 3.8, non-turbo.
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
DATDUDE2345
  • MEMBER
  • 1998 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 115,000 MILES
I have car listed above with a 3800 series 2 v6 engine. I am having problems removing the water pump to replace it. The power steering drive pulley is blocking the last of the four long bolts I have to remove. I need to know how to remove the power steering pulley.
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
KEN
  • ADMIN
Hey Datdude2345,

No problem you will need a tool, watch this video and it will show you how to do it:

https://youtu.be/MtHG4y_rdMI

Please let us know happens so it will help others.

Best, Ken
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
AMERIAH1
  • MEMBER
  • 1998 BUICK PARK AVENUE
How to replace a water pump?
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
See procedures below:
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
CPUTRUCK
  • MEMBER
  • 1997 BUICK PARK AVENUE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 167,000 MILES
Where are the bolts to loosen the steering pump so I can get the last bolt out and remove the water pump? Are the steering pump bolt heads facing the passenger side? Can they be loosened from the top of the engine or do I need to get under the car for this? Thanks in advance for your help!
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
MMPRINCE4000
  • EXPERT
It appears as if the power steering pump is in the way of the rear pump bolt which it is. However, do not remove the power sterring pump, simply loosen the lower bolt-13mm deep socket, "2 bolts hold P/S/ pump assembly, 1 @ 12 o'clock. 1 @ 6 o'clock." Now with the lower loosened about 3/4 out, next remove upper bolt, this allows the pump to rock back out of the way. Step 2 remove motor mount which is not needed at all. The lower water pump bolt (10mm swivel 1/4" drive) can be removed by reaching under the motor mount with a 1/4" air ratchet.
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Monday, July 2nd, 2018 AT 3:26 PM (Merged)
Tiny
VARGASMISO
  • MEMBER
  • 1994 BUICK PARK AVENUE
All wheel drive automatic 150,000 miles.

How do I remove my left motor mount? So far I have removed all the bolts but there are two studs holding it in place. Do I squeeze mount in order to release mechanism?

Thank you,
Misael
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/261618_Noname_2207.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname2_718.jpg



FIG. 13


http://www.2carpros.com/forum/automotive_pictures/261618_Graphic_512.jpg



FIG. 14


http://www.2carpros.com/forum/automotive_pictures/261618_Graphic2_77.jpg



FIG. 15


http://www.2carpros.com/forum/automotive_pictures/261618_Graphic3_14.jpg

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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
SPYGUYFRED
  • MEMBER
  • 1994 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
There are two access holes in the motor mount to remove two bolts on the water pump. I top bolt came out fine. The problem is that I can loosen the lower bolt but when I try to remove it the bolt is so long that it hits the other side of the motor mount and will not come out. Anyone out there that can tell me what I need to do?

Thanks
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
You will need to remove the torque axis motor mount in order to remove the bolt and the pulley.
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
SPYGUYFRED
  • MEMBER
I have removed the four bolts that hold the motor mount to the frame and put a jack under the oil pan with a wood block in between. When I start to jack the motor the car goes up to. I also removed the two nuts under the starter that looked like it attached to the frame. What else to I need to unbolt so the motor goes up but the car does not?
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
MDGIBBONS7
  • MEMBER
  • 1999 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 202,000 MILES
Steps in changing water pump.
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
MDGIBBONS7
  • MEMBER
Also, does the motor mount need to be removed in order to change the water pump?
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
Look on the vin, eighth character determines the procedure, both are described below.
Removal and Installation ("C", "G" & "H" Bodies - VIN "1")

1. Disconnect negative battery cable. Remove A/C compressor splash shield. Loosen water pump
pulley bolts. Drain cooling system. Remove drive belts. Remove coil pack. Remove
supercharger belt tensioner.
2. Remove engine mount. Remove power steering pump. Remove engine mount bracket. Remove
idler pulley. Remove water pump pulley. Remove water pump and gasket. To install, reverse
removal procedure using NEW gasket. Fill and bleed the engine cooling system. See
COOLING SYSTEM BLEEDING.
Removal & Installation ("C" & "H" Bodies - VIN "K")

Drain cooling system. Loosen water pump pulley bolts. Remove drive belt. Remove water pump
pulley bolts and pulley. Remove water pump and gasket. To install, reverse removal procedure using
NEW gasket. Fill and bleed cooling system. See COOLING SYSTEM BLEEDING.
Removal & Installation ("G" Body - VIN "K")

1. Drain cooling system. Remove air cleaner assembly. Remove water pump belt cover. Remove
water pump drive belt. Remove by-pass hose. Remove lower radiator hose from thermostat
housing.
2. Remove bolts from water pump cover. Remove water pump cover. Remove water pump, pump
seal, and gasket from housing using Water Pump Remover (J-38816-1A). Turn tool clockwise
in order to remove water pump. Remove water pump. To install, reverse removal procedure
using NEW gasket. Fill and bleed cooling system. See COOLING SYSTEM BLEEDING.
Except "W" Body

1. Fill radiator to base of filler neck. Start engine. Place A/C-heater control in any position except
MAX. Select highest temperature setting. Idle engine until lower radiator hose is hot.
2. Increase engine speed to 3000 RPM and then back to idle. Do this 5 times to expel any air
trapped in system. Fill radiator as necessary. Install radiator cap. Allow engine to cool. Fill
coolant recovery reservoir as necessary.
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
GJTROVINI
  • MEMBER
  • 1995 BUICK PARK AVENUE
  • V8
  • FWD
  • AUTOMATIC
How do you remove and replace water pump?
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
Remove or disconnect:

1. Negative battery cable.
2. Engine coolant.
3. Coolant recovery reservoir.
4. Serpentine belt.
*If more access is needed, remove inner fender electrical cover.
5. Generator and lay to side.
6. Serpentine belt tensioner pulley.
7. Pulley.
8. Bolts from coolant pump.
9. Coolant pump. Clean
*Coolant pump mating surfaces.

Install or connect:

1. Gasket and coolant pump.
2. Bolts to coolant pump. Tighten
A. Long bolts to 30 N.M (22 lb. Ft.).
B. Short bolts to 18 N.M (13 lb. Ft.).
3. Pulley. Tighten
*Bolt to 13 N.M (115 lb. In.).
4. Serpentine belt tensioner pulley.
5. Generator.
6. Serpentine belt.
7. Coolant recovery reservoir.
8. Engine coolant.
9. Negative battery cable Tighten
*Bolt to 15 N.M (11 lb. Ft.).

Inspect
*For leaks.
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)
Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 1993 BUICK PARK AVENUE
Need to know how to get the motor jacked up on passenger side of car in order to get motor mount bracket off to change water pump.
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Monday, July 2nd, 2018 AT 3:27 PM (Merged)

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