Stonum Automotive
1812 Sunset Place, Longmont, CO 303-485-9303

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: Feb 23, 2025

Heater Core

You may have wondered where the warm air in your passenger compartment comes from. Well, as your engine starts to warm up, it also warms the coolant/antifreeze that circulates around the engine and th...
Published on: Apr 12, 2023

Radiator Fans

If you’re old enough, you’ve heard the term “fan belt”. Back in the day the radiator fan in your vehicle was turned by a belt driven by the engine. There are still belt driven ...
Published on: Aug 21, 2022

Heater Core

{{ image('MzU0') }} Longmont drivers may wonder where the air in a vehicle's passenger compartment comes from. Well, as your engine starts to warm up, it also warms the coolant/antifreeze t...
Published on: May 29, 2022

The Hot Switch (Coolant Vacuum Valve Switch)

When the weather gets cooler, you want the cabin of your vehicle to stay warm.  When you switch on the heat, you may find the air that comes out of the vents just isn't hot.  The problem co...
Published on: Oct 05, 2021

Radiator Fans

{{ image('MzU0') }} Longmont residents who are old enough have probably heard the term “fan belt”. Back in the day the radiator fan in your vehicle was turned by a belt driven by the engi...
Published on: Feb 28, 2021

Stonum Automotive Tech Question On Your Cooling System

Question I was driving down the freeway and smoke started coming out of my car.  I pulled over and called my husband.  I had to be towed to my mechanic.  He said my car had overheated....
Published on: Jan 25, 2021

Air Blend Box

Longmont drivers push a few buttons or turn some knobs, and voila! They have air blowing on their feet or cool air chilling their face. But how does all that happen? Well, it's all thanks to the ...
Published on: Oct 30, 2020