Question about 2001 Buick Century

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I have to keep putting coolant in my buick every other day. What could this be?

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  • Michael Fenton May 11, 2010

    this could be one of several things.

    1) you could have a hose with a pin hole in it which will only get worse. ( it will burst when you are 50 miles from home , dark, and raining everytime).

    yours water pump seal may be satrting to leak ( which will only get very bad soon if this is the case ) you hear no new sounds when engine is running?

    or you may have a pin hole in the radiator from a rock being slung up from the highway.

    you could have the starting of the plastic on the radiator begining to fail

    you could have a blown head gasket and coolant is getting inside the combustion chamber.

    you could have a bad freeze plug.

    you could have a bad radiator cap ( easy fix)

    does your reservoir stay full?

    afer running the engine for a bit does your oil look more tan and milky? this would mean the coolant is getting in the oil.. ( i hope not)

    the temperature gauge is always at normal?

    do you smell the coolant at the exhaust pipe?

    hopefully it is just a radiator cap issue or just an upper radiator hose. these would be an easy fix.



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Intake gaskets are leaking. A common problem for this engine.

Posted on Jun 20, 2009


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How do I bleed the coolant on a 94 Buick lesabre?

All cars are much the same as you just need to get all the air out. Make sure you have the heater turned on full and the coolant tank topped up. Leave the top off the coolant tank. Start the engine and leave it idling. Keep an eye on the temperature gauge and the coolant level. The temperature will increase and then drop slightly as the thermostat opens. Top up the coolant as necessary until the temperature is normal and the coolant no longer drops. Put the coolant cap on and take the car for a short drive, say 15 minutes while leaving the heater on full. Top up as necessary once you get home. That should do it, but it is worth checking after each drive for the next day or two. Some cars can be very hard to clear all air and will have one or more plugs on the top of the engine or radiator. If you have those, you can slightly unscrew them to let any air out, but it is rare to find this on a modern car.

Jul 04, 2017 | Buick Cars & Trucks

1 Answer

Overflow tank filled with dry orange sludge.

I will remove tank,drain all coolant and run water then put new one.

Sep 20, 2015 | 1998 Buick Skylark

1 Answer

1996 lesabre no start but fuel pump makes noise

replace the radiator cap and keep the reservoir bottle up to the line . Check that the hose from the radiator is in good condition. What you have is the hot coolant escaping to the reservoir and as the engine cools down the coolant is being sucked back to keep the radiator full . but sometimes the suck back is not happening and that points to the cap

Mar 09, 2014 | Buick Cars & Trucks

1 Answer

I have a 2002 buick lesabre and the water pump was changes about a month ago. The car ran fine. The last week, the car is temp gauge is reading hot very fast. I dont smell any coolant and it doenst sm

some times when the water pump is changed you gotta fill up the radiator with coolant, run the engine until it gets hot, shut off the car and wait until the car cools down to put more coolant because some air may stay trapped inside and by following this steps you get rid of the air trapped inside.
try this:
1) when the car is cool take the cap of the radiator off and see if it's full. if it isn't, with the car still off, put some coolant until it gets full.

2) once the radiator is full, start your car and wait to see if the coolant goes down the radiator. if it does, keep putting coolant until it doesn't take any more.

Hope to be useful.

Sep 07, 2012 | 2002 Buick LeSabre

1 Answer

Where is cooling senor on 2004 buick rainner


Fig. Coolant temperature sensor location on 2000-2005 4.8L, 5.3L, 6.0L engines

(1) Engine Coolant Temperature (ECT) Sensor
(2) Engine Harness
(3) PCM C1
(4) PCM C2
(5) Powertrain Control Module (PCM) C3

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Jan 24, 2012 | 2004 Buick Rainier

1 Answer

My 98 buick regal looses coolant I have recently flushed system out, replaced water pump & thermostat but my I keep loosing coolant dont see any leaks i will fill it up & in a couple of days its...

Take look down by the belt tensioner. There are two by-pass tubes that run from the tensioner to the engine. The by-pass elbows have rubber seals on them and after the coolant flush may have damaged or ruined the seals.
The only other option is the coolant is going into the engine oil or transmission oil. Check both oils and see if they look "milky"
Good luck.

Nov 21, 2011 | 1998 Buick Regal

2 Answers

I have a 1998 Buick Lesabre that keeps losing antifreeze.

Buick 3.8's are notorious for intake manifold leaks. If you are sure you are not leaking externally (look under the alternator and on the top of the transmission), it could be an intake manifold leak. I've replaced mine...I didn't think it was too hard a job for an amateur.
It could also be a head gasket, but the intake leaks are much more common.

Nov 05, 2009 | 1989 Buick LeSabre

1 Answer

Low coolant light keeps coming on and its not keeping anti freeze

this is a common complaint, GM/Buick recommends you remove the sensor from the radiator side tank and replace it.

Apr 10, 2009 | 1989 Buick Regal

2 Answers

Low coolant light keeps flashing

Replace the coolant level sensor.

Sep 09, 2008 | 2000 Buick Regal

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