Coolant

2010 FORD EXPLORER
106,009 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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GOGASKI
  • MEMBER
  • 1 POST
My mechanic changed my thermostat recently. I am getting an unusual sound when the truck is moving forward coming from the bottom. This only occurs when I accelerate. My mechanic and a different guy hear the sound but cannot identify the source. This morning while the engine was cold, I noticed the reservoir and were both filled to the top. Is this normal? A good friend says there is air in the system causing the noise because they are both overfilled.
Nov 10, 2018 at 12:11 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,051 POSTS
The coolant is overfilled and some should be drained off. Here is a guide to help you do the job:

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Does the car overheat? Can you please shoot a quick video with your phone so we can hear the noise, that would be great? You can upload it here with your response.

Please let us know what you find.
Nov 12, 2018 at 3:44 AM
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