Jim Grant's Tech Tips
Lumina, Coolant Temperature
Q: What is the operating temperature for my car? I have a
'95 Chevy Lumina Ls 3.1L engine with 70k miles. At cruising speeds it
runs at 195 to 200, and at stop lights it runs between 200-230. Is that
too hot? .....Tim
operating coolant temperature of your vehicle's engine is right were it
should be for highway driving. As for the temperature at a stop light?
It's right in line too! Your vehicle is equipped with electric cooling
fans. On may vehicles the cooling fans do not activate until the coolant
temperature reaches 220 to 230 degrees. A cooling system operating under
the correct pressure, with the proper mix of anti-freeze and water, will
not boil to well over 250o. To run clean and efficiently today's engines
need to operate at these temperature levels. Just another reason why proper
cooling system maintenance is so important in today's vehicles.