Subeast-EA81 Posted October 27, 2015 Share Posted October 27, 2015 (edited) So the OBW decided to start overheating, my guess is that its the water pump. I pulled the upper hose off and barely a trickle comes out when its idling. Also did the burp procedure and did a Combustion gas test on the radiator numerous times with negative results,.. So,.. How much water, should the water pump,.. pump? 1996 OBW EJ22 Edited October 27, 2015 by Subeast-EA81 Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted October 27, 2015 Share Posted October 27, 2015 If the engine is cold you won't see any flow through the radiator because the thermostat is closed. When does it overheat? Sitting in traffic? Driving on the highway? Stop and go? Quote Link to comment Share on other sites More sharing options...
Subeast-EA81 Posted October 27, 2015 Author Share Posted October 27, 2015 Test done on hot engine.seams to overheat at an idle... but when I stick my finger in the radiator it's not hot at all Quote Link to comment Share on other sites More sharing options...
AdventureSubaru Posted October 27, 2015 Share Posted October 27, 2015 Could be a blockage in the radiator. Thermostat stuck closed. Or as mentioned, a bad water pump. If you end up needing one, I have a few good used ones laying around that you can have for a couple bucks plus shipping... if it comes to that. How new is the thermostat? OEM or aftermarket? I am assuming you've topped it off and ensured that the coolant levels are full. Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 27, 2015 Share Posted October 27, 2015 how are you testing flow of a hot engine? disconnecting hoses of a hot engine results in explosiveness.... as said: radiator is clogged tstat is stuck incorrect temp gauge subaru water pump failure is very rare and would be one of the least likely items you can think of. Quote Link to comment Share on other sites More sharing options...
Subeast-EA81 Posted October 27, 2015 Author Share Posted October 27, 2015 (edited) fluids where topped off,.. i burped it,.. and subsequently ended up removing the discharge hose from the block, had my wife start it, and only a small trickle comes out at an idle with the temp gauge around 3/4 to hot. the flow around 2000 doesn't seem sufficient for cooling. it was running fine a few days ago then it sat for three days and this happens. Condition of the T-stat unknown at this point, i personaly hadn't delt with it yet, but looks like a T-belt and water pump kit is in my future. thankfully the gas test is negative for now. Edited October 27, 2015 by Subeast-EA81 Quote Link to comment Share on other sites More sharing options...
Subeast-EA81 Posted October 27, 2015 Author Share Posted October 27, 2015 how are you testing flow of a hot engine? disconnecting hoses of a hot engine results in explosiveness.... as said: radiator is clogged tstat is stuck incorrect temp gauge subaru water pump failure is very rare and would be one of the least likely items you can think of. i had already relieved the pressure via the cap and was testing with the cap off. Hose was pulled with the radiator cap off and engine off. then started and idled up momentarily Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 27, 2015 Share Posted October 27, 2015 You're positive the cooling system was completely full and burped when it overheated the first time? No recent work was done to it before the overheating incident? If so that's going to be a clogged radiator, tstat, or headgaskets. Quote Link to comment Share on other sites More sharing options...
Subeast-EA81 Posted October 27, 2015 Author Share Posted October 27, 2015 Yeah I'm sure. I just got home from a short vacation and the car had sat. No signs of leaking. You suggest head gaskets however the compression gas tests (I did 5 tests) came up negitive. Is it still a possibility? Quote Link to comment Share on other sites More sharing options...
Subeast-EA81 Posted October 27, 2015 Author Share Posted October 27, 2015 Well pulled the car in garage and the water pump is leaking now Quote Link to comment Share on other sites More sharing options...
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