Question about 1996 Buick Century

5 Answers

Buick century 96 overheats, and ive done a lot to fix it....?

I have a 96 buick century and lately its been overheating, first thing i did was check the coolant, but even after i put it in, the reservoir would be bone dry, and then sometimes, even in the same day completely full. Finally my overheating got so bad that i took it to a mechanic because i couldnt drive more than a few miles without it steaming. i had the intake gasket replaced. that helped but it was still overheating, so next i figured id replace my thermostat, i did that and there was no difference. i checked my radiator cap and the rubber seal was torn so i replaced that, and its a lot better... but it still overheats.
When i accelerate on the highway really fast, it cools back down. but normally it just fluctuates up and down with the occasional 'in the red'. Today i couldnt get it to go back down while driving which i usually can. and i think whatever the reason is for it overheating is getting worse.
please help.

Posted by on

  • w8emz4oi Jan 14, 2009

    well my car is still overheating, and i ended up replacing the radiator because i cracked it slightly. anyways, new radiator hose, new radiator cap, new intake gasket, new radiator, new thermostat. i can drive around town all day stop and go driving with a few breaks here and there, but on the highway after about 10 miles, its in the red and starts smelling. i cant think of what else is wrong. driving with it in the red for a little bit is now causing a pink fluid to leak on the snow when my car is stopped. looks like steering fluid. what else can it be?


  • Anonymous Feb 05, 2009

    I have a 1996 buick century that the temp gauge shoots up to halfway, blows cold air. Upon the temp needle dropping the heat comes a rolling.Just today replaced the radiator,water pump, and the thermostat to no avail to my problem of air blowing cold then warm then back to cold again. Anybody out there got any ideas?


5 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I had the same problem with my 96 buick century and it was the intake gasket. The 1990's buicks all have the same problem where the gasket fails after about 100,000 miles. The radiator fluid then starts leaking in with the oil. Check your oil and make sure it is not high. If it is high, then the intake gasket is your problem. They make a special replacement gasket now that does not have the same issue. However, I doubt I'm going to keep mine another 100,000 miles so I just put in the stock gasket. Hope this helps.

Posted on Oct 15, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have a 96 Buick Century that is overheating. The gauge goes up and down. The heater works sometimes and then It blows cool air. Ther is some sludge in the radiator. could this be the thermostat?
I'm having the radiator flushed and clean and a new thermostat put in . Could this maybe be my problem?

Posted on Nov 08, 2009

My engine cooling fan will not work no power to plug but dont know why

Posted on Nov 09, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Buick Master
  • 1,779 Answers

When was the radiator drained flushed and refilled w/ 50/50 water antifreeze mix?If u don't know or it's been over 2 years, or you've been running it w/ water only, the radiator could be plugged up w/ rust and sludge. You can drain the system, to do it properly u should drain the radiator, and the engine block. You can refill, run it, and drain it a couple of times, until water flows clear during the entire draining process. You could also remove the radiator, bring it to a shop where they can flush it out and check the flow. Do u have an auxiliary cooling fan, or just the one fan between radiator and engine? If u have an auxiliary fan, make sure it's going on. Sounds like u covered everything else, it seems a plugged up radiator is about all thats left. Let me know how you make out. countrycurt0

Posted on Oct 01, 2008

  • Curt Downs Jan 15, 2009

    Wow!! Can't believe you're still having trouble! How about the 'cooling fan control', it signals the cooling fan switch to cycle the fan on and off as needed. Sorry, I don't know the exact location of it, but it sure would explain your problems w/ the car. The pink fluid u see can be power steering fluid, or auto trans fluid. Curt


  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Expert
  • 76 Answers

Just a long shot guess, but if the vehicle fluids were not taken care of like they should you could have a possible blockage in the radiator. I would run it to operating temperature with the radiator cap off and make sure that the thermostat opens, and that the fluid gets hot. I have seen cars with partial blockages in the radiator due to rust, and the radiator fluid will not get as hot as it should, effectively transfering the heat from the engine. Even if there is poor circulation in the radiator, it can make a world of difference in the temperature.

Posted on Oct 01, 2008

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.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

What would make my 1997 Buick century to keep over heating I have replaced head gaskets and put in new thermostat

Let's start with the simple and make sure the coolant mixture was 50/50 and not 100% coolant. That will make it overheat.
Second, thing I would check is if there's a code for your catalytic converter or oxygen sensor. If your converter is clogged, then it builds back pressure that overheats the engine.
Hopefully that helps. That's all I can think about without actually having done the head gasket replacement myself or having inspected the vehicle. And make sure the heads were resurfaced and inspected as well.

May 31, 2016 | Buick Cars & Trucks

1 Answer

Low coolant light stays on until system heats

Your overflow tank(aka coolant recovery reservoir) is low on coolant. The coolant expands when warm and raises the level in the tank, which turns off your light. Top off the reservoir (when cool) to the "Full Cold" line. If you have to keep adding on a regular basis, then you have a leak somewhere in your cooling system, could even be the reservoir itself.

Oct 18, 2015 | 2000 Buick Century

1 Answer

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

1 Answer

What could be the cause? I have a 1991 Buick century. I just had my heads changed. It ran good for the first day, but today when I was riding I was going 45 mph and pressed the pedal to go a Lil faster,...

First thing I would check would be to make sure they put enough coolant back after they did their work. Sounds like the car overheated and the engine seized up.

May 19, 2014 | 1991 Buick Century

1 Answer

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

1 Answer

1990 Buick Regal overheating

You have leaking engine cylinder head gaskets, this may be the cause of the overheating or a result of it, replace the head gaskets and have the radiator cleaned by a by a radiator repair shop, that should cure the problems.

Feb 06, 2012 | 1990 Buick Regal

1 Answer

How to fix air on '96 buick century

There could be a multitude of things wrong with the AC but the most likely culprit is that your system simply needs charged. You will need to take it to an auto shop to have the system purged and recharged, this isn't something you can do yourself as you must be licensed. If the AC is indeed broke, the shop won't be able to charge it and should let you know that there is an issue.

Thanks, a vote/feedback is always appreciated. =)

May 30, 2011 | 1996 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

2 Answers

What type of coolant should I add to a 1999 Buick Century...dashboard lite says coolant low

gm put DEX- COOL in the car when it was built, but who know what has been done to it since then so you should probably go get some all makes all models anti-freeze you can get it a any auto parts store.......HAVE FUN

Jan 16, 2011 | 1999 Buick Century

Not finding what you are looking for?
1996 Buick Century Logo

1,375 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

70347 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6876 Answers

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

Answer questions

Manuals & User Guides