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engine overheat with new thermostat but not when removed

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engine overheat with new thermostat but not when removed

  #1  
Old 02-13-2016, 08:41 AM
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Join Date: Mar 2015
Posts: 3
Default engine overheat with new thermostat but not when removed

I have a 2.2 with a new head gasket, rebuilt head, water pump. The issue is that the engine runs hot with my new and old thermostat. The antifreeze is cool be but engine hot, it seems like was it restricted. Here's the kicker when I remove.the thermostat it run just.fine what can cause the problem
 
  #2  
Old 04-03-2016, 12:12 PM
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Join Date: Apr 2016
Posts: 3
Default

you have a blockage somewhere. coolant only runs through the thermostat one way (like a check valve) so when you remove it the coolant is allowed to flow backwards through the engine which is why your not overheating without one.
 
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