Question about 1998 Buick Century

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Air in cooling system

I have air in my cooling system of my 1998 Buick Century, opening the relief value does not help. car overheats

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If you have air what i can recomend is to turn the air conditioning on make sure the radiator fans are on and with the a/c compressor still runing set the cold and heat inside the dash board to the hotes and leave the car runing and keep addind 50/50 mix ANTIFREEZE TO THE RADIATOR UNTIL IS FULL you need to keep there until teperature is normal and no more air trap

Posted on Jun 01, 2008

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Causes for a Buick century to overheat?


It sounds like your car has a bad thermostat that won't open all of the way. However it could have a bad electric cooling fan, fan relay, temperature gauge or fuse!

Sep 22, 2014 | 1998 Buick Century

2 Answers

My 2002 buick century overheats and has no heat


Possible trapped in system. Bleed system, should have two small screw bleeders, one in front of left valve cover on pipe behind water pump and the other on coolant pipe outlet as you follow upper rad. hose towards engine. Engine cool, remove rad cap, open both bleed screws and fill rad until coolant flows free out both bleed ports. close both bleed screws, rad cap off, start engine and let idle until upper hose is hot to touch , shut off, let it cool down for 20 minutes, top up rad and install cap. restart car ,drive and check.

Jan 02, 2014 | 2002 Buick Century

1 Answer

How to bleed cooling system on a 3100 Buick Century?


If there is a bleed valve near the upper radiator hose, you can use that.
If not, you would have to run the engine with the cap loose until the thermostat opens to let the air escape.

Sep 23, 2012 | 2003 Buick Century

1 Answer

I got a 98 Buick century I change the water pump. Thermostat hoses and top and bottom gaskets I put water on the radiator and spitsit right back would you toll me what could be the problem thanks


You have an air bubble inside the cooling system. There is a little bleeder valve by either the thermostat or where the hose goes into the motor. It should look like a bleeder valve on the brakes or just a thumb screw. Anyway you need to open that bleeder when the motor is cool while you are adding the antifreeze. Leave it open just until all air bubbles come out and it's straight antifreeze. Then close it and finish filling the resevior. Run the motor about 10 minutes. Let it cool and then recheck fluid level again.

May 22, 2012 | 1998 Buick Century

1 Answer

1998 buick century blows cool air no heat. cant find the heater coil fuse if there is one. any ideas


It could be one of the following or a combination of the two:
  1. System is low on antifreeze/coolant
  2. Bad thermostat
Assuming the coolant level is good, the odds are pretty good you have a bad thermostat.

Oct 10, 2011 | 1998 Buick Century

1 Answer

1999 centuri buick how to replace a water pump


Start by removing the cover that is held on by two 8mm bolts above the water pump that has the belt routing diagram on it. Before removing the belt, break the 10mm bolts loose holding on the water pump pulley. Remove belt. Remove the 8mm bolts holding the water pump on, there are 6 if I remember right. Note the position of the two metal tabs molded to the water pump because it only goes on one way. Remove water pump and scrape off any old gasket material that may have stayed on the engine. Install the new water pump and reverse the procedure for installation. After completing the job, fill up the coolant, Dex cool coolant or equivalent long life coolant. Before starting the car, crack open the two coolant bleed valves one at a time until no air is coming out and it is straight coolant, but be careful because these tend to break easy. Close the bleeder and repeat for the second one. The hardest part of the job is getting all of the air out of the cooling system. These can be stubborn. Start the car and let it reach operating temperature. If it overheats, you may have to crack the bleeders open again because you have air in the system.
Hope this helps. Good luck!

Apr 09, 2011 | 1998 Buick Century

2 Answers

Hi i just brought a buick century 1998 and well is overheating and i dont know what it could be?


It could be many things. Low coolant, fault thermostat, a blockage in the system, worn or broken water pump impeller, slipping belt on water pump pulley, the cooling fans may not be operating (this could be a faulty temp sensor, fuse, relay, wiring or the fan motor itself).

Mar 12, 2011 | 1998 Buick Century

1 Answer

Hey, I'm not a car guy at all but I'll try my best to describe the problem. I have a 1986 Buick Century Estate Wagon, and for some reason it likes to randomly overheat/probably for a certain reason. My...


Probably thermostat sticking or bad water pump. CK the belt to the water pump to see if it's loose. If the thermostat sticks, water can't be pumped thru the motor, overheats and overheats the radiator causing hot water or steam to build up pressure.and the relief valve will open allowing the peessure to be relieved and blows coolent everywhere. If the radiator overheats turn off motor wait until the radiator cools before removing cap. been there, done that-------once

Sep 03, 2010 | 1986 Buick Century

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My 98 buick century overheats i bought a brand new thermostat water pump and radiator and its still overheating any solutions?


You should take it to a rad shop and get the whole cooling system cleaned and flushed,then pressure tested to eliminate it before goig any furter because an y other cause of overheating is going to cost you a bundle.

Oct 23, 2009 | 1998 Buick Century

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