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Old 12-12-2012, 05:20 PM   #9
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Join Date: Mar 2007
Location: the barnyard
Posts: 2,458
My Ride: '79 Massey Ferguson

You can see it in the middle bottom of the pic ^ ture. I think it's mostly to circulate warm coolant through the heater core so you can get a little extra heat after the engine is off. It also makes bleeding them much easier, as you can get 90% of the air out with the engine off.

Last edited by lcoleman; 12-12-2012 at 05:20 PM.
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