Low Coolant Light


Asked by Apr 26, 2016 at 10:45 PM about the 2002 Buick Century Limited

Question type: Maintenance & Repair

Rebuilt engine at 84,000 miles in March. New intake and other gaskets,
plugs, wires, radiator, hoses, etc.

Driven about 1,500 miles since rebuild. Today "low coolant light" came on
briefly. After letting engine cool, checked and it was a little low in radiator.
Added a cup to a cup-and-a-half. Drove it home from work (about 20
miles). Light came on again. After letting engine cool, checked again. Had
to add maybe a half cup or less.

My boss (much wiser on cars than myself) said that little coolant needed
should not have triggered the light. He also said a newly rebuilt engine
uses some coolant and that seemed well within range for that. Having to
add a little again this evening - is that cause for concern? Checked other
fluids - everything seems fine, no mixed fluids or anything.


2 Answers


Back to basics: First, pressure test the cooling system. A leak will show as pressure drop, even if liquid isn't visible. Visually inspect for any signs of coolant on exterior of engine, heater core, and hose connections. A small leak of 180 degree coolant may evaporate away rather than leak to the ground, but leaking gaskets should be visually detected. Look around intake manifold to cylinder head seals. Electronically test the sensor for proper calculation. place a clean cloth or paper sheet under the engine compartment after driving the car up to operating temperature, and parking the car. leave it overnight, inspect for fresh drips in the morning. If found, "look up"! Good luck.


If all the above is good, then try checking the sensor.

Your Answer

Add photo

Related Questions

Search Buick Century Questions

Buick Century Experts

#1 John Saffrahn
John Saffrahn
Reputation 840
#2 Tom Demyan
Tom Demyan
Reputation 640
#3 LtColumbo
Reputation 300
View All

Related Models For Sale

Used Buick LeSabre"
16 Great Deals out of 2,600 listings starting at $1,450
Used Buick Regal"
190 Great Deals out of 10,617 listings starting at $5,900
Used Chevrolet Impala"
938 Great Deals out of 35,894 listings starting at $700
Used Ford Taurus"
351 Great Deals out of 23,123 listings starting at $1,400
Used Chevrolet Malibu"
1,181 Great Deals out of 72,985 listings starting at $695
Used Toyota Camry"
1,730 Great Deals out of 99,028 listings starting at $895
Used Honda Accord"
1,309 Great Deals out of 78,753 listings starting at $1,395
Used Pontiac Grand Prix"
27 Great Deals out of 4,392 listings starting at $1,972
Used Nissan Maxima"
476 Great Deals out of 24,268 listings starting at $800
Used Nissan Altima"
1,495 Great Deals out of 88,168 listings starting at $1,195
Used Mercury Grand Marquis"
49 Great Deals out of 2,571 listings starting at $1,300
Used Ford Focus"
1,213 Great Deals out of 57,386 listings starting at $1,495

Used Cars For Sale

2004 Buick Century Limited For Sale
2 listings starting at $3,295