Why Change My Antifreeze?

How Often Should You Change Your Antifreeze/Coolant?

 

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Coolant Thermostat

I was speaking with our Shop Foreman, Robert Isbell, the other day as he was working on a customer vehicle. I Inquired as to what was wrong with the vehicle. He stated that the thermostat stuck and as a result the vehicle overheated and had to be towed in. He further explained that the thermostat is a mechanism that opens and closes many times during the time the engine is running to maintain proper engine temperature. If it sticks closed it prevents the coolant from circulating through the engine, it overheats and suddenly your stranded, worse, you might do major engine damage. I asked why the thermostat would stick. He stated that when the engine coolant is not maintained properly, it becomes dirty and sticky and deposits form on the plunger of the thermostat and as a result, one day it sticks closed and doesn’t open again. Result? Stranded. Don’t know about you, but just the sound of the word ‘stranded’, is bothersome. So I thought this might be a good subject to begin our monthly ‘Service Tips’ with.

For “ordinary” antifreeze, Honda recommends coolant changes every two years or 30,000 miles. On newer Honda’s ( 2006 and Up) the on-baord diagnostics will let you know via the “Maintenance Minder”. Some say it’s not a bad idea to change the coolant every year for maximum corrosion protection. Continue reading