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Heater coolant direction
Posted: Wed Dec 24, 2014 10:45 pm
by Tweety
Can anyone tell me on the ea81 where the heater hose connects to the water pump, whether the coolant is being sucked into the pump at that point or forced out of the pump. My guess is it is being sucked into the pump.
Posted: Thu Dec 25, 2014 12:05 am
by TOONGA
Of course I can't find the page in the FSM to confirm that Tony but post 10 in this thread on USMB
http://www.ultimatesubaru.org/forum/top ... er-cooled/ has a diagram that says it is the return from the heater.
TOONGA
Posted: Thu Dec 25, 2014 7:24 am
by Nubaru
i REMEMBER FLOW IS OUT DIRECTion from the metal pipe at the back of inlet manifold, so agree that pump is pulling it back through its top 16mm hose connection
Posted: Thu Dec 25, 2014 8:18 pm
by Tweety
Yep, got it. so the pump draws coolant from the lower radiator hose and the heater core into it then pumps it into the engine.
Thanks
Posted: Mon Dec 29, 2014 3:55 pm
by El_Freddo
Tweety wrote:Yep, got it. so the pump draws coolant from the lower radiator hose and the heater core into it then pumps it into the engine.
Thanks
That's it mate!
And as a trivial point, in an L series if you have your heater connected the wrong way around it will make a gurgling sound on start up/increase in revs
Cheers
Bennie