Subaru Impreza GC8 & RS Forum & Community: RS25.com - View Single Post - Weird Overheating Issue
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Old 02-11-2009, 09:21 AM  
bugman1964
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To double check the pump take off the cap make sure the system is full run the car with out the cap and watch down the fill hole once the thermostat opens you should see flow.Also once it opens actuate the throttle by hand or have some one else do it the flow should increase with the throttle.

It could also be sign of a bad head gasket if your getting bubbles. If the bubbles are only their when the car is running especially and the higher amount of coolant then normal. Check for oil in the coolant and coolant in the oil.
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