Question about 1996 Buick Century

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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.

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  • 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?


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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

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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

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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


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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

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