Question about Buick Cars & Trucks
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
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
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
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
Ok 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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