Question about 2001 Buick LeSabre

1 Answer

How hard is it to replace water pump

3800 6 cylinder

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.


    An expert that hasĀ over 10 points.

  • Contributor
  • 1 Answer

Replacing the water pump is very easy. I have done it a few times. I have owned a total of four full-size GM cars; a 1992 Oldsmobile Eighty-Eight, a 1989 Buick LeSabre, a 1999 Pontiac Bonneville, and my current 2001 Buick LeSabre. Here is a description of how it all fits together. The water pump is aluminum and is bolted to the timing chain cover, which is also aluminum, and which contains the oil pump, oil pressure sending unit, and oil filter base. The timing chain cover contains three coolant passages, one inlet and two outlets. The inlet passage connects to the lower radiator hose. Since the radiator hose connects to the timing cover and not to the pump itself, you do not have to remove the hose. Each outlet passage goes to one side of the block. On 1990's models, the front engine mount bolts on over the water pump, and replacing the pump requires you to support the engine and remove the mount. 1980's models have all the engine mounts at the bottom, and 2000 and later models have the front mount bolted to the cast aluminum oil pan. Besides a new water pump and gasket, you will need Permatex High Tack gasket sealant, Permatex #2 sealant, Blue Loctite, a socket set, a gasket scraper or razor blade, a torque wrench, a drain pan to catch the coolant, and new coolant. Before you replace the water pump, flush the cooling system out in the driveway. Then drain out as much water as you can outside and push the car into the garage, or fill the radiator with water and drive the car in and drain it in the garage. Begin by loosening the four bolts that hold the water pump pulley to the pump, but leave the belt on as it will help hold the pulley still while you break the bolts loose. After you have loosened the pulley bolts, remove the serpentine belt. Draw a routing diagram if there isn't one under the hood. Now remove the bolts and the pulley. With the belt and pulley off, the pump is fully accessible. Remove the eight bolts and the pump. DO NOT loosen or remove any timing cover bolts. Some of the bolts are short and thread into the timing cover, and some are long and go clear through the cover and thread into the block. If the pump is stuck to the timing cover, first make sure all the bolts are out. If you are unsure, look at your new pump (you bought one before trying to remove the old one, right?) and observe where the bolt holes are and compare to the old pump. If the pump still won't come off, hit the edge of the drive flange (the round part that the pulley bolts onto) with a soft-faced hammer and the pump should break loose. If that doesn't work, insert a pry bar between the pump and the drive flange, NOT between the pump and the timing cover, and pull toward you. Now, you must scrape the gasket surface of the timing cover completely clean and smooth. I like to use a razor blade. A long-handled scraper is safer for you but more likely to dent or gouge the aluminum. DO NOT use a wire brush or sandpaper. While it is a little dangerous to hold a razor blade in your fingers while scraping a gasket, it forces you to work slowly and carefully. Hold the blade as flat as possible to the surface and start at the edge of the gasket, lifting the gasket off as you go. Don't try to shove the blade through the middle of the gasket. You will slip, slice your fingers, and damage the surface. OUCH! Clean the bolts thoroughly with a wire brush. Remove all traces of rust and sealant. Now check the threads in the timing cover and engine block. Clean them with a long, thin wire brush such as a gun-cleaning brush, or a tap. You will notice that the holes that go through the cover into the block go all the way into the water jacket. Sealant must be applied to these bolts or they will leak and corrode. That's why it's important to clean them. Clean the gasket surfaces of the timing cover and the new water pump with brake cleaner. Now, coat the gasket surfaces with a thin layer of Permatex High Tack. Place the new gasket on either the timing cover or the new water pump, The High Tack will hold it in place. Coat the threads of the bolts with Permatex #2. Slip a couple of bolts through the pump and install the pump, making sure the correct bolts go into the correct holes. Torque the long bolts to 22-29 ft-lbs and the short bolts to 8 ft-lbs. Reinstall the pulley, using blue Loctite on the bolts. Reinstall the belt and torque the pulley bolts to 10 ft-lbs. Refill the cooling system and you are done. I hope this helps you, and remember, don't ever be afraid to fix your own car. Just make sure you understand what you're doing, work safely, and use the right tools.

Posted on Dec 30, 2012


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Is there a place to check the timing on a 1992 3.3 liter Buick with a timing light like you can a 350 chevy

the timing is computer controlled,the only timing marks are on the cam where the timing chain is,,check compression on all cylinders,because getting to the timing chain is a big job,its behind the water pump,here are some videos for you, 1986 cutlass 3 8L timing chain replacement

Crank Position Sensor Replacement Stalling 3800 3 8 Engine

Apr 03, 2015 | Buick Cars & Trucks

1 Answer

Remove and replace water pump on a 3800 2006 Chevy malibu

remove the serpentine belt remove the water pump pulley then remove water pump

Oct 20, 2014 | 2006 Chevrolet Malibu

1 Answer

I am removing my water pump and seems to be stuck

what engine 3800 or 3400
3800 has i think 8 or so bolts
3400 has 5 bolts
make sure all the bolts are removed if so use a screwdriver and tap it with a hammer against the water pump flange
hope this helps

Dec 05, 2009 | 2004 Chevrolet Impala

1 Answer

Car overheats frequently i add plenty of 50/50 dex cool and water daily it still tends to over heat we have a new thermostat and water pump but there is a hose missing off of the air compressor would this...

If you have a 3800 motor check your intake manifold gasket these are the symptoms that my car exhibited untill the motor locked up because it had filled the cylinders with water.
The dex cool deteriorates the gasket and the plastic intake manifold.
Replace the intake manifold and gasket, flush the dex cool out of the motor and replace with the regular green coolant.

Jul 12, 2009 | 1999 Chevrolet Malibu

1 Answer

How to remove the fuel pump to get to the water pump

Well to start off the fuel pump is in the gas tank. Do you need to replace the fuel or water pump? The water pump is on the engine. Im assuming you have a 3800? If you go to the Library and check out a chiltons manual it will walk you thru the procedure for water pump R&R.

Jun 08, 2009 | 1997 Buick LeSabre

1 Answer

Hose from the water pump is leaking

no diagram needed.  Buy a new hose and replace it.  Refill the cooling system and bleed it. 

Mar 27, 2009 | 1999 Buick Regal

2 Answers

Engine overheating in Pontiac Grand-am 1997,, we changed the thermostat, and it did nothing

could be the water pump or the head gasket, warped or cracked head... what size motor if its a 2.4 the water pumps on them are very hard to replace.

Feb 20, 2009 | 1997 Pontiac Grand Am

2 Answers

I need to move the power steering pump to replace the water pump

the pulley needs to be removed to remove the PS pump, this pulley is pressed onto a tapered shaft (they used a bolt around 35 years ago), it requires a special power steering pulley remover/installer tool, u can borrow this tool from Kragen and other parts stores like them, as how it works, it can be a little hard to set it up if u have never used this tool before.

Jan 23, 2009 | 1996 Oldsmobile 88

Not finding what you are looking for?
2001 Buick LeSabre Logo

159 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

78919 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides