To do this, you have to flush out all of the old stuff. But has anyone tried to do this? The manual says there is a petcock or plug somewhere down in the lower engine block to let out all of the old coolant/water. I have looked & looked, but can't find it. I have looked on both my W40 and on a friend's Perkins 4-108 to no success.
The only drain outlet I know is at the heat exchanger, but this will only drain the stuff at that level.
Does anyone have a picture of where the lower plug is?
The coolant is supposed to be changed after a few years, to make it fresh with the anticorrosive properties, among other things, just like you are supposed to do with your car.
Mine has NEVER been changed.
Jack
Nothing to it. Open the engine compartment under the companionway and put your left hand on the flywheel housing right next to the engine block ( This would be on the port side). Extend your first finger straight down alongside the block and you should find a 1/4" pipe plug. I found it by accident...