my question is what size is the coolant block drain plug on the starbord side of the block ??? looked like it might be a 1/2 extension but tried it but its bigger?? maybe torx or 3/4 extension might fit?? anyone know the easiest way to flush and get all old coolant out??



my seals that connect the heat exchanger to the block leaked out oover winter, i guess its a common problem 2002 and older. when it gets cool the seal shrinks and drains about a gallon out the never part # seal is made a little different has a extra rib inside where it seals agains the pipe comming out of the h/e . 9$ each went ahead and replaced both easy as hell just gave me a reason to flush the coolant that says should have been done after 5yrs anyways

Pull the plug or a hose and let it drain. If your really wanting to flush the block it's no different than a radiator, but I'd just add new coolant myself. I sure wouldn't use Dexcool. I'd go get CAT extended life.

already bought 6 gallons of the merc pre mixed stuff which is dexcool i guess. 12$ gallon

i just need to figure out what kind of tool it takes to pull the plug

the more i look at it it kinda looks like a huge allen someones got to know