Engine and Exhaust
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How Cool is That! (Coolant level sensor replacement)
Your vehicle’s engine runs hot. It should, since it’s a series of little explosions that create the power that gets you going where you want to go. To keep the engine cool, eng...
Published on: Mar 08, 2026
Thermostat
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The thermostat is part of your cooling system. Boulder residents' vehicle thermostats perform a similar function to the thermostats in their homes. At home, you set your...
Published on: Sep 07, 2025
A Long Lasting Cooling System For Boulder, CO Driving
Our vehicles operate in a wide range of outside temperatures. That’s why vehicle manufacturers use testing grounds from the frozen tundra to the blistering desert. Your engine antifr...
Published on: Jun 26, 2023
Simple Answers from John's 4X4 Center for Boulder: Cooling System
Question
My engine never overheats. Why should I get a cooling system service?
Answer
That’s a good question to ask, because if you don’t have the full answer you may end up in tr...
Published on: Mar 26, 2023
John's 4X4 Center Advice on Your Cooling System
Last week I was out running errands and my temperature warning light came on – total panic! I pulled over and my car was overheating
After it cooled down, I went right in to my service ce...
Published on: Sep 29, 2022
Cooling System Service At John's 4X4 Center
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Your vehicle cooling system's job is to keep your engine cool. Coolant (also called antifreeze) mixed with water flows through your engine and absorbs heat. The mixture then ...
Published on: Jan 01, 2022
Cooling System
We’re often asked questions about the cooling system – the system that cools your engine and keeps it at the proper operating temperature. Let’s examine the topic in two areas:...
Published on: Jul 29, 2021
John's 4X4 Center Tech Question On Your Head Gasket
Question
My name is Landon. I bought a new minivan and it started smoking out the tail pipe. They said my head gasket went out. What can I do to prevent this from happening again?
...
Published on: Jan 10, 2021