codytotheh Posted April 18, 2009 Share Posted April 18, 2009 Just got a legacy sedan 173k on the clock. ej22. 5 spd. It was overheating no pressure in upper hose lower hose was cold. so i changed the thermostat and fluched the rad. still doing it, no heat when idling it doesn't overheat get on it for a second and temp goes right up...... im dumbfounded, still hot upper hose, cold lower hose. when i drained it from the rad. flush stuff it was warm but not hot at all..... ideas on what this could be, no smoke no coolant in the oil. Link to comment Share on other sites More sharing options...
86subaru Posted April 18, 2009 Share Posted April 18, 2009 did you use a oem thermostat ? could have a air pocket , i just did a timing belt job and changed the thermostat + hoses + water punmp had the same problem you did , so i changed the thermostat again but used a oem Link to comment Share on other sites More sharing options...
Cougar Posted April 18, 2009 Share Posted April 18, 2009 It sounds like a thermostat or waterpump problem. Link to comment Share on other sites More sharing options...
EVOthis Posted April 19, 2009 Share Posted April 19, 2009 +1^ Link to comment Share on other sites More sharing options...
codytotheh Posted April 19, 2009 Author Share Posted April 19, 2009 so ************ty stant thermostat most likely?? i was in a hurry and i usually use oem, this one was like 8 bucks Link to comment Share on other sites More sharing options...
Durania Posted April 19, 2009 Share Posted April 19, 2009 Take that Stant thermostat out and take it back. Order a new thermostat and a gasket from the Subaru dealer and start back over from square one. Link to comment Share on other sites More sharing options...
nipper Posted April 19, 2009 Share Posted April 19, 2009 Replace the t-stat with one from OE, and get a new cap. Then slowly fill the system back up with the car running, check the level, cap it, drive, repeat and you should be good. Aftermarket T-stats have much smaller opening and restircts flow. They als have no jiggler valve. nipper Link to comment Share on other sites More sharing options...
ccrinc Posted April 19, 2009 Share Posted April 19, 2009 The other very obvious thing you are overlooking is that the radiator itself is clogged. Subaru radiators tend to corrode from the inside > out. At that kind of mileage, it's time for a new radiator anyway. (No recore: not very effective on Subarus.) No flow through the rad would account for different temps at the hoses. Sorry. Emily http://www.ccrengines.com Link to comment Share on other sites More sharing options...
Cougar Posted April 19, 2009 Share Posted April 19, 2009 You bring up a good point Emily. The radiator tubes may be clogged alright. Link to comment Share on other sites More sharing options...
codytotheh Posted April 20, 2009 Author Share Posted April 20, 2009 i have ran plenty of water / coolant through this readiator trying to diagnose this, including two full flushes, get great drainage. when i took out the stant super crap. one side of it water, other side coolant..... ill try the dealer tommorow i really hope they have a thermostat in stock. if no luck after that im going the rad, then waterpump then hand grenade route till something makes this move. Link to comment Share on other sites More sharing options...
milkman111083 Posted April 20, 2009 Share Posted April 20, 2009 this is kind of obvious but i figured id put it anyway cause it is easy. My brothers Toyota was having similar problems and it ended up that an old radiator cap was the problem. the car ran fine and cool at idle but when he got on the gas the bad radiator cap let air leak in and it formed a bubble that totally stopped the coolant from circulating. Link to comment Share on other sites More sharing options...
Guest blondy Posted April 20, 2009 Share Posted April 20, 2009 Don't want to be repetitive, but i also agree that it could be a cap and/or a clogged radiator. In one of my old cars i thought the radiator was fine, but i removed it and took it to a radiator place. They dunked it in water to fill it up and then emptied it out again, and by doing that they could tell if it filled/emptied quick/slow enough for the size of radiator it was and were able to tell me if it was clogged or not. Also on my parents car they had the same radiator cap issue, replaced it and all started returning to normal. If you do replace the thermostat, put it in a pot of water and bring the bot of water to the boil...if it opens you'll know it wasn't the problem...but i think the thermostat is stuffed once you do that test...it mainly puts you mind at ease to whether it was or wasn't stuffed. You may know this already, or there maybe a better way to test it, but this way was recommended to me since curiosity got the better of me, and i wanted to know if mine was stuffed or not. Good luck Link to comment Share on other sites More sharing options...
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