My new daily driver. 1984 dodge rampage
I put a brass adaptor, and a drain petcock in place of this plug too. When you crack open the coolant system on these your supposed to remove this plug when refilling the coolant to push out the air pockets when refilling. With the drain petcock, you just spin it open and fill the coolant until it bubbles out, then spin the petcock closed. The OEM ones were steel hex key plugs and would corrode to the aluminum making them almost impossible to remove.
I put a brass adaptor, and a drain petcock in place of this plug too. When you crack open the coolant system on these your supposed to remove this plug when refilling the coolant to push out the air pockets when refilling. With the drain petcock, you just spin it open and fill the coolant until it bubbles out, then spin the petcock closed. The OEM ones were steel hex key plugs and would corrode to the aluminum making them almost impossible to remove.