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Old 06-14-2021, 05:28 PM   #1
Join Date: Sep 2018
Location: North Wildwood, NJ
Posts: 92
Cooling capacity

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
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Old 06-14-2021, 05:57 PM   #2
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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.
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Old 06-14-2021, 08:10 PM   #3
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My Dynasty with 8.3 and side radiator holds just over 11 gallons.
Dennis and Katherine
2000 Monaco Dynasty
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Old 06-16-2021, 01:20 PM   #4
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Do you have the manual? Mine has a section waaaaay in the back with capacities.
2003 Monaco Dynasty 42 Regal.
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