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2000 Buick LeSabre upper radiator hose going flat after the car has run then sits for a few hours.

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The coolant contracts when it cools down and should go back to the overflow tank. This is not happening properly. You may want to change the radiator cap, that should fix the problem. Also, how old is the thermostat? I would change that as well. If your coolant hoses are old or very soft maintance is due. A coolant hose breakdown in winter is just as bad as summertime.

Posted on Oct 25, 2012


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Posted on Jan 02, 2017

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SOURCE: 2000 buick lesabre stall after starting or after running for 30 minutes

I have a 1996 Lesabre. I had a similar problem that slowly got worse. I brought it to two different mechanics that did diagnostic checks and could only "suggest" what to replace to fix the problem. Their problem was that it wouldnt stall out while they had the mv. After replacing a bunch of sensors and the fuel pump/ filter, I solved the problem by replacing the Crank Sensor. Its located behind the lower crank pulley on the 3.8 lt motor. Hope this helps!

Posted on Oct 29, 2008

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SOURCE: bottom radiator hose cold. upper radiator bulging.

The fan won't come on because the thermoswitch is in the bottom of the radiator, without coolant flow the switch never gets hot. Just because a part is new doesn't mean it is good, is the thermostat an aftermarket part ? I would take out the thermostat (leave the gasket) and see if the bottom hose gets warm. If the bottom hose does not get warm, you may have a blockage or bad water pump

Posted on Apr 18, 2009

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SOURCE: lower section of upper radiator hose seperated from filler cap ho

Dealer only place to get the whole 3 piece radiator hose assembly for problem you describe. Not bad price.I know this from my experience. Trust me I searched everywhere. T-stat located where diagram that was sent. $60.00 for part

Posted on May 22, 2009

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SOURCE: 2000 Buick LeSabre heater only blows cold

the climate control thermostat is not opening the valve to let the warm coolant in

Posted on Nov 29, 2009

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SOURCE: where is the drain plug for the radiator on a 2000

c2d1fde.jpgOk looking at all different Manufactors, and i have'nt seen one with a radiator drain plug..So if you are tring to flush your raditor, just take off the bottom radiator hose, and run a hose in the radiator, and flush it out the best way you can...Then top it off with a Gallon of coolant, and you should be fine...Goodluck...

Posted on Dec 11, 2009

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1 Answer

How do I find the part number to replace the upper radiator hose in my 1999 Buick Lesabre

The 1999 LeSabre only comes with a 3.8L 6 cylinder engine. Autozone lists a Dayco Upper hose part number D71779 with an alternate part number L-946.

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My upper radiator hose busted and the car shut off on its own, towed car home, replaced hose and did flush, but now the car won't start. turns over but won't start.anyone know what might be the ptoblem?

When an engine shuts itself off because it is running too hot, this normally does serious internal damage. You have most likely cracked or warped the head. It will have to be checked out by a mechanic.

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My 2000 Buick Lesabre blew water hose and I replaced it and thermastat but its still runs hot

Dis you bleed the cooling system of trapped air? If not do that first.

Jan 29, 2013 | 2000 Buick LeSabre

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How do I replace the thermostat in my 1992 buick lesabre

Open the Century's hood. Follow the upper radiator hose from the engine to the coolant outlet housing, on the upper portion of the engine's side.Remove the bolts holding the coolant outlet housing to the engine, using a socket wrench and an 8 mm socket.Pull the coolant outlet housing off the engine, by hand. Shove a rag into the outlet housing to prevent debris from entering the engine.Clean the sealing surface on the engine and housing, using a gasket scraper.Remove the rags from the engine and coolant outlet housing. Start the engine and let it run until the temperature gauge reaches operating temperature.
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Feb 01, 2012 | 1992 Buick LeSabre

1 Answer

Where is the thermostat of the buick lesabre 2000

follow the top radiator hose to the engine. The thermostat housing is at the end of thst hose.

Jan 04, 2011 | 2000 Buick LeSabre

1 Answer

How do I replace the thermostat on my 2000 Buick Lesabre Limited 3.8 liter V6?

find where the upper radiator hose goes into the engine. the thermostat lives under that cover. drain some coolant from your COLD engine(to avoid burns) remove the bolts and replace the thermostat. be sure to also purchase a new gasket. some 3.8 s use both a rubber and paper gasket. parts store should have listings. reinstall, refill coolant, and run engine, topping off coolant as engine warms. some have small bleeder screw on the thermostat housing to air in bleeding air while filling. just crack it open until steady steam of coolant comes out. test drive and recheck coolant level. recheck coolant and adjust level for the first few days.

Dec 21, 2010 | 2000 Buick LeSabre

1 Answer

How do I check the flow on a water pump on a 2001 buick lesabre?

Best way is with a non-contact laser thermometer, it cost about $30.00 at Harbor Freight Tool if there's one in your area, point the laser to the lower hose and then to the upper hoes, should have a reading of + or - 10 deg. between the two.You could also used a reguler thermometer, with radiator cap off and engine running, let it sit in there, temp. should go up and down as thermostat opens and closes if water is flowing through.

Dec 04, 2010 | 2001 Buick LeSabre

1 Answer

Trying to determine which hose is the inlet hose for flushing coolant system on a 2000 lesabre 3.8 v-6

Top radiator hose moves coolant away from engine and through radiator and bottom hose moves it into the engine

Sep 29, 2010 | 2000 Buick LeSabre

1 Answer

How to change the Thermostat in a 1998 Buick LeSabre

Follow the upper radiator hose to the engine. The hose clamp on the end is clamped to the thermostat housing. Drain the coolant through the petcock valve on the radiator, or place a large pan under the vehicle to catch what escapes. It's easier to remove the hose from the therm housing, then remove the housing. (put the thermostat back in the way it came out. Pointy end towards the radiator.) Clean off the old gasket from both surfaces, install new therm, apply new gasket. reverse procedure and top off with coolant.

Feb 13, 2010 | 1998 Buick LeSabre

2 Answers

Where is the drain plug for the radiator on a 2000 buick lesabre

c2d1fde.jpgOk looking at all different Manufactors, and i have'nt seen one with a radiator drain plug..So if you are tring to flush your raditor, just take off the bottom radiator hose, and run a hose in the radiator, and flush it out the best way you can...Then top it off with a Gallon of coolant, and you should be fine...Goodluck...

Dec 11, 2009 | 2000 Buick LeSabre

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