Re: Engine Cooling Concerns

Posted by Owen_Dyneto On 2015/4/5 17:17:23

Packard water distribution tubes are brass, though some aftermarket replacement ones (Dorman, for one) were galvanized steel. Chrysler also used steel in their flathead 6s and 8s. So unless it was replaced at some time with a steel tube the end won't be rusted away, but it can be packed with debris such that the last hole or two that directs cool water to the exhaust valve seat area will no long function; typical end-result if the situation is allowed to persist is overheating, especially at the rear of the block, and a cracked block at the exhaust valve seat spreading often to the cylinder wall. Thus the reason why it's suggested to remove and inspect it, and clean if needed.

It can only install one way.