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Guest Message by DevFuse

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Coolant on first startup

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2 replies to this topic

#1 MR_Loyale


    22 Years of Ownership. 94-16

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  • Seattle

Posted 26 July 2014 - 06:36 PM

I am close to starting up my EA82 that has been apart for head work and such. It occurred to me that just filling the radiator with coolant would leave the engine sucking air for a while until it circulates. Is there a ways to ensure there is coolant in the block immediately upon first startup? Add via thermostat housing perhaps?  Or am I making an issue out of nothing?

#2 Ibreakstuff


    Breaker of stuff

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  • Carson Valley, NV

Posted 26 July 2014 - 08:32 PM

You could turn the water pump by hand and milk the lower coolant hose. But my belief is that most of the air would burp out before you reach any temps that could hurt anything.

#3 johnceggleston


    Lite Master of the Subaru

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  • Virginia

Posted 27 July 2014 - 09:50 AM

oil is a much bigger concern than coolant.

spin the engine over with the starter while the injectors are unplugged.

this will circulate the oil and keep it from starting.


the t-stat will not open until the engine reaches full temp.

so even if there is coolant in the block it will not be circulating.

once at operating temp the t-stat will open and coolant will flow.

top it off as needed.

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