funkinalive
Well-Known Member
Hi everybody, we are getting ready to winterize the 580k and drained the coolant from the radiator, i was just wondering how to drain coolant from the block?
^^^ this^^^Pretty sure the 4-390 cummins does not have a drain in the block - so just pull the hoses & drain.
It appears # 21 is the block drain in the picture.
I definitely agree that it is probably an oil gallery plug. I just thought I would post the picture so that anyone reading this thread and are unfamiliar with draining engine blocks would know what kind of plug to look for.It does look like a drain plug Tinkerer, but the description of it makes it an oil gallery plug.
What I meant was, that the pipe plug is used in both situations. For plugging oil gallery passages and as a plug for the coolant drain hole. It is not uncommon for petcocks to be in the coolant drain hole also.aha! so it sorta doubles as a coolant drain bolt for the block then?
On a 4-390 engine does the water flow in the top and out the bottom?
I think the water goes from the engine thru the lower hose then back to the engine thru the upper hose/thermostat.
This is reverse to what I 1st thought was logical. If so and the level is low in the radiator, the pump has to push the water to the top hose.