simbey1982 Posted January 21, 2009 Share Posted January 21, 2009 other than a head gasket...what could cause this: Temp ranges from normal to just below red...it rises and falls rapidly....the more you drive usually its lower...the more you idle usually its higher...blowing cool air through vents unless engine is revved then blows hot and normal??? Maybe air in the cooling system?? bad rad cap?? Cory Quote Link to comment Share on other sites More sharing options...
Rooster2 Posted January 21, 2009 Share Posted January 21, 2009 other than a head gasket...what could cause this: Temp ranges from normal to just below red...it rises and falls rapidly....the more you drive usually its lower...the more you idle usually its higher...blowing cool air through vents unless engine is revved then blows hot and normal??? Maybe air in the cooling system?? bad rad cap?? Cory I would add bad thermostat and bad water pump to the list! Prolly, more emphasis o bad thermostat. Quote Link to comment Share on other sites More sharing options...
Suzam Posted January 21, 2009 Share Posted January 21, 2009 Burp the system first to make sure there is no air bubble. +1 on the thermostat, if you're going that route, get a genuine Subaru replacement. Radiator cap is cheap and should be replaced also. Quote Link to comment Share on other sites More sharing options...
simbey1982 Posted January 21, 2009 Author Share Posted January 21, 2009 yeah i replaced the thermostat about 5000 miles ago.....im gonna try a rad cap...i just finished flushing out the system so ive been filling it as it sucks it down...hoping its just an air pocket.... Cory Quote Link to comment Share on other sites More sharing options...
simbey1982 Posted January 23, 2009 Author Share Posted January 23, 2009 filled the coolant again and replaced the rad cap....comparing the old and new it really needed a new one... Problem solved Thanks Cory Quote Link to comment Share on other sites More sharing options...
Gloyale Posted January 26, 2009 Share Posted January 26, 2009 (edited) yeah i replaced the thermostat about 5000 miles ago.....im gonna try a rad cap...i just finished flushing out the system so ive been filling it as it sucks it down...hoping its just an air pocket.... Cory Hope you used a Subaru Thermostat. If you didn't, I would seriously go get one and yank that stant crap out of there. The Suby stats pull open almost twice as far to allow more flow. Plus 1 for burping the system really good. No heat out the dash vents is a sure sign of air in the system. Edited January 26, 2009 by Gloyale Quote Link to comment Share on other sites More sharing options...
simbey1982 Posted March 9, 2009 Author Share Posted March 9, 2009 just to wrap this up....i had a crack in the plastic coolant housing in the radiator...sucking up air and creating an air pocket....a new radiator fixed the problem... Quote Link to comment Share on other sites More sharing options...
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