Question about 1998 Buick Century

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Runs hot New radiator, themostat, head gaskets, no apparent leaks, fans work, no water in oil

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Hello hiriam,

Here are a few suggestions:

1.First check the radiator temperature with a separate temperature gauge. This will double-check your dash gauge.

2. Check to see that the electric fan that cools the radiator is coming on when the car is running hot. If not you need to replace the cooling fans and control relay.

3. Could be you have a water pump that is going out and needs to be replaced. Also check the coolant level and look for any leaks.

4. Get the cooling system flushed with a caustic flush to get any sediments/particulate/slushy matter out.

Hope that helps!

Please dont forget to rate or "Accept" the solution if it helped you in any way, or leas you to a fix.

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IrishDruid

Posted on May 18, 2008

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You coolant level sensor has stopped working, my 93 olds regency is doing the same thing. You will need to goto the a Buick/GM dealership to get the part, it plugs into the side of the radiator.

or

am guessing you mean overheat. To "heat up" is normal. We want the car to heat up, but to go any higher than about 225 degrees would be to overheat, and that would be bad. If that is what you mean, then there are a number of things that could be causing it. It could be as simple as to high of a concentration of anti-freeze to water mixture(should be a bout 50%), to something as costlty as a blown head gasket. The water pump could have the impellers rusted off and not pumping, the radiator could be stopped up, there could be air trapped i the cooling system, there could be an obstruction to air flow in front of the radiator like leaves trapped in front of it, the cooling fan may not be working, even the thermostat you installed could be defective or installed backwards. It boils down to this: You either have a coolant flow or an air flow problem. (I am including the blown headgasket in the coolant flow catagory) As simple way to narrow it down is when then car is running hot, put your hand on the radiator. If the radiator is hot, then you probably have an air flow problem, see if the fan is working, or there are leaves in front of the radiator. If the radiator is cold, then you have a coolant flow problem, something is keeping coolant from flowwing into the radiator. (water pump, ai in the system, stopped up radiator, etc)
AS you changed the parts this maybe problem with the air flow in the car



good luck

Posted on May 18, 2008

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Try the cheapest, and most overlooked first, the radiator cap, theey do wear our where they wil not hold the proper pressure.
If after installing a new cap it still overheats, have the vacuum checked, a low steady reading would indicate a leaking intake manifold, another possible cause of overheating as the vehicle is running too lean.
Another, but not likely item to check is the temperature sending unit, it just might be giving the wrong reading.

Posted on May 18, 2008

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