R31 320HP D4 coolant change

[zekeandboone]

2021 R31 320hp.... Anybody done a coolant change?

 

[American Flyer]

2021 R31 320hp.... Anybody done a coolant change?

Hi Steve,
We had it changed during our annual service last year. The complete system was drained, including the water heater loop. Is yours needed already? I guess it is near the 4 year mark isn’t it. Time flies!

 

[S. Todd]

I change ours every year with the amount that will drain from the block, about 12 quarts. That way, I suspect the amount remaining in the cabin heater and water heater core get sufficiently diluted with new coolant and there is reasonably fresh coolant throughout the system. Otherwise, I am not sure how you would remove all the coolant from the system unless you disconnected numerous hoses and used a vacuum to attempt to remove all the old fluid.