Can air in the cooling system cause the thermostat to stick closed?
195

Asked by cheriwalker65 Jun 05, 2014 at 01:15 AM about the 2002 Mercury Cougar V6 Hatchback FWD

Question type: Maintenance & Repair

Air bubbles are present after new
radiator and thermostat and the
thermostat fails to open.

1 Answer
785

Revealed answered 10 years ago

Check your thermostat by removing it,place it in boiled water for 5min.check if it opens and then place it in tap water,check if its closing.if it does refit it and bleed your water system

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