Cooling capacity

[Pat M]

Good day all,

For the first 3 years I sent my coach out for the PM. So I never attempted this on my 1999 Monaco Executive with side radiator and a M11 450hp Cummins. I am about to change the oil to Valvoline Blue (10.5g), lube & all new filters. I also want to flush the cooling system and replace the antifreeze with Fleetguard ES Complete OAT. However, I cannot find out have many gallons are in the cooling system? Any help or comments would be greatly appreciated.

Thanks and as always safe travels,
Pat M

[GrantR]

I flushed the cooling system before this season started, I have a 450 Cummins with a rear radiator and that took 7.5 Gallons of coolant. It is probably similar, maybe another .5-1 gallon for the additional hose capacity.

[barmcd]

My Dynasty with 8.3 and side radiator holds just over 11 gallons.

[wamcneil]

Do you have the manual? Mine has a section waaaaay in the back with capacities.
Cheers,
Walter