My '77 2F engine has a circulating block heater that's never used by me and is now slowly leaking (installed by a PO). The original cock and plug on the block were taken out for this heater to be installed, so I'd like to remove it and install the correct cock & plug. My question -- when I remove the heater, will only the coolant in the water jacket drain -- or will more of the radiator coolant be syphoned out, too? I just flushed and replaced all coolant last year, so I hate to mess with that entire process again, but will if I have to.
Thanks!
Thanks!