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Old 07-11-2019, 09:49 AM   #57
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Yes if you have oat coolant in there, the test strips will read 0 as there is no nitrate / molybdate to read nor is there supposed to be.
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Old 07-11-2019, 12:21 PM   #58
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I hope this isnít too off topic but: I just had my C7 cooling system serviced and had Cat ELC put in. Stupid question- is this an OAT coolant. So many different terms for basically the same thing these days!
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Old 07-11-2019, 12:58 PM   #59
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Quote:
Originally Posted by BillJinOR View Post
Yes if you have oat coolant in there, the test strips will read 0 as there is no nitrate / molybdate to read nor is there supposed to be.
That's what I'm wondering. Other than being a little darker from being wet, the test strips showed little change and don't seem to match any of the colors on the chart. The top strip is before the test, bottom strip is after. Maybe someone with more experience with the test strips can chime in.
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Old 07-11-2019, 02:41 PM   #60
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It looks to me like you are reading the test strip correctly.


I would be very concerned if indeed F/L filled with a pre-charged with SCA coolant and additional SCA in the form of liquid DCA4 from Fleetguard was not added or if the records do not indicate that the water filter (WF2071) was changed at each annual service.


The Khameleon product from Safety Kleen is very confusing to me. Reading from their website it appears to claim to be compatable with everything.....don't see any Cummins approvals.


I would get in my daily driver, head to a truck shop and buy several bottles of DCA4 before driving the unit anywhere.


Once that was done, drain and refill with either pre-charged SCA low silicate coolant approved by Cummins or convert to OAT.


I have decided long ago to stay with pre-charged SCA low silicate Fleetguard coolant with WF2071 changes as necessary.


I test every 6 months and add DCA4 if required.


Liner pitting is an expensive issue...stay on top of it and let us know your results.
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Old 07-11-2019, 04:29 PM   #61
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The Cat C-7 and Cummins B series engine don't have wet cylinder liners so the SCA/DCA isn't a issue.
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Old 07-11-2019, 05:26 PM   #62
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Quote:
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The Cat C-7 and Cummins B series engine don't have wet cylinder liners so the SCA/DCA isn't a issue.

Great I am doing it correctly. But I have been told, don't know if it is true that if you switch to a SCA Coolant then your should maintain the SCA.

Anyone know it that is correct?
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Old 07-12-2019, 05:15 PM   #63
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Oat boosters are no longer used
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Old 07-12-2019, 05:16 PM   #64
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Oat boosters are no longer used
Oat in an rv is good for more than 6 years.
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Old 07-13-2019, 12:28 PM   #65
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Great I am doing it correctly. But I have been told, don't know if it is true that if you switch to a SCA Coolant then your should maintain the SCA.

Anyone know it that is correct?
Yes, for general corrosion
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Old 07-13-2019, 01:10 PM   #66
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Great I am doing it correctly. But I have been told, don't know if it is true that if you switch to a SCA Coolant then your should maintain the SCA.

Anyone know it that is correct?
Don't know .

I use fully formulated SCA pre-charged diesel coolant in my generator, but never test, or add liquid SCA.
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Old 07-13-2019, 01:20 PM   #67
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As a quick note, when we bought our used Newmar I emailed Spartan and they provided the build info. Capacity, type, coolant filter number. Can I be positive a previous owner adhered to those specs ... no. But, I have no reason to think otherwise. I use test strips regularly and make DCA adjustments when necessary.
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