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U225 Coolant Questions

August 30, 2019, 04:11:03 pm

As I posted in a previous post, I'm in the process of replacing my coolant and am puzzled by the various types available, whether flushing is required, and the amount of coolant I will need. I can't find any of this info in my Foretravel manual.
Any thoughts? This coach has a 5.9 Cummins.

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Re: U225 Coolant Questions

Reply #1 – August 30, 2019, 05:34:00 pm

Brett Wolf has a good procedure for flushing and installing coolant,I would go with the red Fleetguard coolant and flush your whole system out,Cummins and some truck supply stores have it in stock,get the 50/50 mix and a couple of 100% gallons.

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Re: U225 Coolant Questions

Reply #2 – August 30, 2019, 07:07:00 pm

I agree-- though the Cummins B engine is a parent bore engine, so coolant type is not as critical as with linered engines, I also recommend the new generation long-life coolant.  Since it is a Cummins, I would use their product (Fleetguard) so if you are ever at a Cummins dealer for work they will have the correct coolant on-hand.

Properly flush, install the new generation long-life coolant and do nothing for 5-6 years. No testing, no additional chemicals, etc. Same for other/linered engines.

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Re: U225 Coolant Questions

Reply #3 – August 30, 2019, 08:58:49 pm

There is a discussion on the iRV2 forum about coolant for the 5.9 Cummins, along with a 2013 quote from Cummins South Plains:
From Cummins Southern Plains:

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Routine Maintenance Recommendations

• Check coolant level before every trip
• Check coolant concentration every 15,000 mi. / 6 mo.
• Drain and flush system every 60,000 mi./2 yrs. and refill with heavy-duty coolant.

Always use antifreeze. In addition to freeze protection, antifreeze is essential for overheat and corrosion protection.

Use of supplemental coolant additives (SCA) are not required for the ISB engine.

Definition of Heavy-Duty Coolant

A combination of 50/50 water and low silicate antifreeze (ethylene glycol or propylene glycol are acceptable).

Protects to -34°F. Freeze protection decreases above 68% antifreeze. Antifreeze must meet ASTM 04985 (GM6038M) specs.
Rusty
coolant for 5.9 cummins - iRV2 Forums

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