Burbing the cooling system

[Sapper 157]

So what are the best ways to "burb" a cooling system of the air? I know that one way involves parking on a hill but im not sure what the exact procedure is. I just re flushed the system (got a whole bunch of sandy looking crap out) and I think there must still be some air in it because it is still running too warm. 

[turfman454]

park uphill. turn your heater on high . Once the thermostat opens you should get a pretty good initial burp out of it. Once it starts to circulate it shouldnt take to long to get all the air bubbles out of it

[nipper]

Fill the cooling system from empty SLOWLY with the engine runing. Allow the T-Stat to open and keep filling, yes with the heat on. Level ground is fine. 

[jono]

you should also be able to find a funnel designed to fit in the neck of the radiator of an EA81, maybe some extra electrical tape to make it a nice tight fit. I run mine with funnel fuller than full to burp it, squash hoses a bit, heater tap open ie hot and also run an EA82 or home built coolant overflow reservoir and suck back double seal cap on radiator.

[MR_Loyale]

I gently squeeze the hose to help force the air out.

Edited September 15, 2015 by MR_Loyale

[coronan]

Good thermostats have a jiggler valve in them and burp themselves.

 

If not drill a 1/16 hole in the flat area of the thermostat.  

[subnz]

No matter how careful / slowly   cooling systems are refilled with water, air will be inevitably trapped in the system somewhere. 

 

The object of the exercise is is to remove these air locks and the best way to do this is to RUN the motor for a significant amount of time

 

with the radiator cap off to release air topping up when necessary

 

Up to 30 minutes so that the engine comes up to temperature with thermostat opening and water pump pushing / circulating water around  to help push air out.

 

Parking on slopes / squeezing hoses etc not necessary.

 

Subaru heaters usually have water running through heater core continuously unless modified  ( part of the primary cooling circuit { motor / water pump / heater core} until thermostat opens)

 Heat + cooling happens  by heater control air flaps  directing air to / away from heater core so setting heater controls to hot makes no difference in this process.

Edited September 18, 2015 by subnz

[ShawnW]

No matter how careful / slowly   cooling systems are refilled with water, air will be inevitably trapped in the system somewhere. 

 

The object of the exercise is is to remove these air locks and the best way to do this is to RUN the motor for a significant amount of time

 

with the radiator cap off to release air topping up when necessary

 

Up to 30 minutes so that the engine comes up to temperature with thermostat opening and water pump pushing / circulating water around  to help push air out.

 

Parking on slopes / squeezing hoses etc not necessary.

 

Subaru heaters usually have water running through heater core continuously unless modified  ( part of the primary cooling circuit { motor / water pump / heater core} until thermostat opens)

 Heat + cooling happens  by heater control air flaps  directing air to / away from heater core so setting heater controls to hot makes no difference in this process.

Agree with you on the newer Subarus but on the old ones the coolant shuts off to the heater with a control valve.