I haven't actually heard of this problem for many years, but in the "old" days, 1950s and 1960s, old rubber hoses in the cooling system could become soft and collapse from the water pump suction. That, of course, would block the coolant flow. Probably not likely nowadays but it wouldn't hurt to give all the hoses a squeeze.
__________________
2016 Minnie Winnie 27Q on a 2015 Ford E450 chassis. Retired U.S. Air Force. Lived in Anchorage, Alaska for 30+ years. Now Living in Deming, NM.
|