Coolant overflow/reservoir tank question

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liquify33

liquify33

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Take a look around the heater control valve. That plastic may have a pinhole. Wrap some TP around it, if it gets wet it shows. Also check at Heater hose QD at intake manifold.
The line was clogged. I have/had a lower intake manifold leak and didn’t realize coolant was disappearing because the line was clogged. I needed heat recently for the defrost and just got cold air.

Did some digging, unclogged the line and then blew the snot out of the intake gasket driving it like a rental. In process of repairing and overhauling now.
 
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