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  #18  
Old 03-07-2021, 06:22 AM
wiley-moeracing wiley-moeracing is offline
350 Buick
 
Join Date: Feb 15, 2010
Location: arizona
Posts: 1,347
You had air trapped in the block and it pushed out the coolant, it happens, especially when you fill to fast. You can leave the thermostat housing off and fill the block full then install and fill the rest of the cooling system or let it sit overnight to purge out air.
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