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RussMcB · 03-19-2018

My initial guess - The radiator has never been out and has a ton of dirt in it. Search and you'll find lots of owners have taken their radiators out, often to replace with a new four core radiator, and found lots of years of dirt and leaves in there. Apparently, that stuff can get in but not out.

03-19-2018	#2
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,148	Re: Overflow tank bubbling My initial guess - The radiator has never been out and has a ton of dirt in it. Search and you'll find lots of owners have taken their radiators out, often to replace with a new four core radiator, and found lots of years of dirt and leaves in there. Apparently, that stuff can get in but not out.