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Topic: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot? (Read 732 times) previous topic - next topic

Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

I have a gallon of coolant suitable for the ISM11 in the basement.  If I need to add coolant to the Kubota engine can I use the same coolant as i would use for the ISM11?

What coolant is used in the Aquahot?

Roger
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #1 –
My coach came from the factory with Texaco ELC in all three systems.  I have stayed with compatible coolants ever since.  You can do the same if you're certain no one has taken shortcuts in the past 12 years.  If you don't know what's in the genny, top up with distilled water until you can flush and refill with your engine coolant.
Regards,
Brett

'99 42' Foretravel Xtreme
'14 Brown Motorsports Stacker
'05 Chevy SSR
'02 BMW R1150R

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #2 –
In the older models it is all the same stuff in the ever aquahots they use a Boiler fluid that s none toxic and a bit harder to find.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #3 –
Oh and roger yours is like mine.  Older.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #4 –
Thanks John.  I'm older too.  That is what I thought.  The pre 2003 aquahots use the same engine coolant.  The coils are outside of the hot water tank.  Later models have the coils inside the hot water tank and use the non-toxic coolant.  It is all there on Barry B's web site.  Isn't his hard work great!

Roger
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #5 –
Not necessarily so. My 03 aqua hot is the old style, but came from foretravel with the boiler antifreeze. There should be a tag by the aqua hot if it has the boiler antifreeze. Just have to look very careful for labels as to what type might be in there
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #6 –
My 97 had antifreeze in the aqua hot that tested to -52 degrees F.  diluted it with one gallon of distilled water and the air  coming from the vents seems to be hotter.  Same electric 1400 watt element source.

Mo' better.

Bob

"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #7 –
Bob,

The spec for Aqua Hot Coolant is as follows for both engine coolant and Camco Boiler coolant:

Maximum Coolant  --  50% Coolant/50% Distilled Water
Minimum Coolant  --  30% Coolant/70% Distilled Water

Too much coolant results in poor to very poor heat transfer as it is the Distilled Water that transfers the heat.  Have had clients with 100% coolant and next to no heat transfer.  Drained half the coolant out and replaced with Distilled Water and all was well.

If you do not have an electronic control board, you can use engine coolant.  If you have an electronic control board, you need to use GRAS coolant (Generally Recognized As Safe) for which Camco Boiler Coolant qualifies.  The change of occurred in the 2003 time frame.  As mentioned above, look on heater and overflow bottle for a warning label on units needing GRAS coolant.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Coolant type -- ISM11 and PowerTech Kubota engines and AquaHot?

Reply #8 –
Quote from: Rudy –
Bob,

The spec for Aqua Hot Coolant is as follows for both engine coolant and Camco Boiler coolant:

Maximum Coolant  --  50% Coolant/50% Distilled Water
Minimum Coolant  --  30% Coolant/70% Distilled Water

Too much coolant results in poor to very poor heat transfer as it is the Distilled Water that transfers the heat.  Have had clients with 100% coolant and next to no heat transfer.  Drained half the coolant out and replaced with Distilled Water and all was well.

If you do not have an electronic control board, you can use engine coolant.  If you have an electronic control board, you need to use GRAS coolant (Generally Recognized As Safe) for which Camco Boiler Coolant qualifies.  The change of occurred in the 2003 time frame.  As mentioned above, look on heater and overflow bottle for a warning label on units needing GRAS coolant.

Thanks Rudy. Yes very noticeable  that the water works better. 

Bob
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4