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Maybe I'm stupid , but . . . . .


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Exactly what in the world is the "wiggler" on the thermostat for and does it matter what its location is when putting it in ?:slobber:

 

there is a small hole in the t-stat with a wiggle plug in it. it is designed to let air flow through to avoid an air lock. it wiggles to break up air bubbles and avoid a blockage.

 

assuming you are using a 'subaru' t-stat, as long as the long side goes up, into the water pump you'll be good.

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