coolant system

Asked by Jul 15, 2016 at 10:40 AM about the 1999 Chevrolet Lumina 4 Dr LS Sedan

Question type: Maintenance & Repair

My lower coolant hose is extremely hot
while the upper is cool

1 Answer

22,310

It is normal that the bottom hose gets hot before the top hose but if it is getting extremely hot and starting to overheat the vehicle thermostat is stuck closed and needs to be replaced.

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