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Old 09-17-2013, 09:27 AM
Junior Member
Join Date: Oct 2012
Location: Savannah, GA
Posts: 9
Default 1990 Regal 3.8L engine, low coolant light slowly blinking.

1990 Regal 3.8L engine, lowcoolant light slowly blinking.

Coolant level OK, fans working,surface temp on top of thermostat averages 190 degrees.

I suspect that the low coolantsensor may be bad. Where is it located?

What else could it be?
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Old 09-17-2013, 06:25 PM
Senior Member
Join Date: Sep 2010
Posts: 641

They can be all over the place depending on model. Usually located in the same area as the thermostat location.
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Old 09-21-2013, 08:40 PM
Kiss4afrog's Avatar
Junior Member
Join Date: Apr 2012
Location: Hudson, WI
Posts: 25

I think the one you're looking for is on the radiator, passenger side end tank.
Attached Images
File Type: jpg 90 regal cooling sys diagram 2.jpg (67.1 KB, 2 views)
95 Regal 3.8 130K
97 LeSabre 3.8, recent intake, 200K
The advise is free, you get what you pay for !!
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Old 09-22-2013, 10:27 AM
Junior Member
Join Date: Oct 2012
Location: Savannah, GA
Posts: 9

Thanks, I located it, but man is it inaccessible. I removed the fender shroud and still could not get my hands or tools close enough to remove it.
I drove it a lot afterwards and it finally quit blinking. I had added coolant a couple weeks ago because the overflow container was empty.
The only thing I can think of is there was an air lock in the radiator and if finally burped and let the coolant fill up the void. I will keep checking it.
I am apparently not strong enough to press the radiator cap in enough to remove the cap (of course when it is cold), I'll get my son to remove and replace it.
Thanks for your "free" advise.
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Old 09-22-2013, 10:27 AM

buick, coolant, forum, light, low, regal

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