roadsubiedog Posted September 8, 2012 Share Posted September 8, 2012 Heater works fine for awhile and then blows lukewarm. also temp gauge is slightly hot. put in a new thermostat and new waterpump. Quote Link to comment Share on other sites More sharing options...
Prwa101 Posted September 8, 2012 Share Posted September 8, 2012 What kind of Subaru is this? Could be the radiator, over time it will fill with crud and restrict the flow to the rest of the car like the heater core, also making it heat up. Is it still running warm with the new thurmo and water pump? Prwa AAE Quote Link to comment Share on other sites More sharing options...
mikaleda Posted September 8, 2012 Share Posted September 8, 2012 Sounds like a clogged heater core to me you can back flush your heater core by reversing your heater lines and running youre engIne than switch it back. When your done you probably want to flush your system to keep it from clogging up again Quote Link to comment Share on other sites More sharing options...
suberdave Posted September 8, 2012 Share Posted September 8, 2012 my EA82 Wagon did the exact same thing. the heater core was clogged. i tryed back flushing it many times. did not work. had to replace the heater core. now it has been working awesome for the last 6 years or so. sorry for the bad news... -=Suberdave=- Quote Link to comment Share on other sites More sharing options...
2.5LOYALE Posted September 9, 2012 Share Posted September 9, 2012 replaced my core.....worx great.... would do the same:popcorn: Quote Link to comment Share on other sites More sharing options...
Durania Posted September 9, 2012 Share Posted September 9, 2012 I had luck replacing a faulty radiator cap after flushing heater core. Used a tappered fitting used to repair a garden hose. Fits right in a heater core line. Quote Link to comment Share on other sites More sharing options...
ivans imports Posted September 9, 2012 Share Posted September 9, 2012 heater core take 1 hour pull the whole dash out drop cullom and pullout whole heater box as unit watch for cracks were the lines go into core have had good luck with geting a rad shop to recondition cores is fairly cheap Quote Link to comment Share on other sites More sharing options...
jonas Posted September 9, 2012 Share Posted September 9, 2012 Ya, flushed mine several times, no dice. Really not looking forward to replacing core, but getting tired of freezing. Quote Link to comment Share on other sites More sharing options...
roadsubiedog Posted September 17, 2012 Author Share Posted September 17, 2012 switched the heater hoses and now the heater blows real hot like it should. the temp is still running 190-195 though. may have to get a new radiator. how long should I flush the heater core? Quote Link to comment Share on other sites More sharing options...
Durania Posted September 17, 2012 Share Posted September 17, 2012 When you see water coming out of the other hose and not coolant. I will do about 2 or 3 minutes per hose. Quote Link to comment Share on other sites More sharing options...
roadsubiedog Posted September 23, 2012 Author Share Posted September 23, 2012 When you see water coming out of the other hose and not coolant. I will do about 2 or 3 minutes per hose. thanks. after flushing heater core the heater blows hot now. still runs hot though. i'd like to know where to find a reman radiator or how can i see if it is a blown head gasket. this is a 84 gl. Quote Link to comment Share on other sites More sharing options...
Durania Posted September 24, 2012 Share Posted September 24, 2012 thanks. after flushing heater core the heater blows hot now. still runs hot though. i'd like to know where to find a reman radiator or how can i see if it is a blown head gasket. this is a 84 gl. Did you do the radiator cap? Quote Link to comment Share on other sites More sharing options...
roadsubiedog Posted September 26, 2012 Author Share Posted September 26, 2012 Did you do the radiator cap? yes. new cap. thermostat and waterpump. it takes about 10 minutes to start overheating after getting to 180 degrees. and yes the fan comes on when it is supposed to. this weekend i am gonna switch out radiators with my good daily driver 84 gl. this should tell me something. Quote Link to comment Share on other sites More sharing options...
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