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Old 07-28-2014, 05:09 PM   #1
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Coolant change?

I'm getting ready to flush and replace my coolant on my Allure 04 Cummins 370 ISL.
What is everyone using I'm thinking Fleetguard but there are so many options. Or maybe just take it to a Cummins service center and have it done.
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Old 07-28-2014, 05:35 PM   #2
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Quote:
Originally Posted by 2dogsbarkin View Post
I'm getting ready to flush and replace my coolant on my Allure 04 Cummins 370 ISL.
What is everyone using I'm thinking Fleetguard but there are so many options. Or maybe just take it to a Cummins service center and have it done.

If you're ok with keeping up with SCA levels the Fleetguard ES Complete EG is an excellent coolant. If you want to go with an OAT type extended life & get away from SCA testing then Fleetguard has one of those also. If you go with OAT, just make sure you know the drill for doing a complete clean and flush.


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Old 07-28-2014, 06:55 PM   #3
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I recently had a complete drain, flush and refill at my Cummins Coach Care shop. I elected to go with OAT coolant. They used Fleetguard ES Compleat OAT. If you use Final Charge OAT you can always find that at truck stops.
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Old 07-29-2014, 07:14 AM   #4
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Originally Posted by 2dogsbarkin View Post
I'm getting ready to flush and replace my coolant on my Allure 04 Cummins 370 ISL.
What is everyone using I'm thinking Fleetguard but there are so many options. Or maybe just take it to a Cummins service center and have it done.
Just went through all that, its a real challenge choosing the right product. It is too a challenge to get all the existing coolant out of the system. Having a place to dispose of the old stuff.
Here is what I did, I lost the majority of mine due to a leaking hose, found the hose and repaired. (Long story). I then ran dironized water in the system for several hundred miles (could only get 16 gals in). On my 07 there is no SVA filter. End of story I drained the engine and radiator, (did not pull the bottom hose). I used mobile concentrate with sca recommended by a huge truck shop and they had it by the case..,mixes with Amy type coolant. If you drain every 3 yes or so you do not need to be concerned about the sca, if not just have the sca checked when servicing the engine.
Or you may have my luck and loose it all., don't hurt quiet as much.
Over on yahoo CC site under files (coolant) is a paper from Cummins you might be interested in reading.
Good luck
Marvin
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Old 07-29-2014, 07:36 AM   #5
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Sorry about the typing. My fingers are too big.
BTW. IF you do it yourself avoid the 50-50 mixes unless you use the same type you have now. if you drain and flush you will not be able to get enough coolant back into the system with the 50-50 mix. JMHO
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Old 07-29-2014, 07:42 AM   #6
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if you drain it, why can't you get the 50/50 in
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Old 07-29-2014, 07:47 AM   #7
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Just went through all that, its a real challenge choosing the right product. It is too a challenge to get all the existing coolant out of the system. Having a place to dispose of the old stuff.
Here is what I did, I lost the majority of mine due to a leaking hose, found the hose and repaired. (Long story). I then ran dironized water in the system for several hundred miles (could only get 16 gals in). On my 07 there is no SVA filter. End of story I drained the engine and radiator, (did not pull the bottom hose). I used mobile concentrate with sca recommended by a huge truck shop and they had it by the case..,mixes with Amy type coolant. If you drain every 3 yes or so you do not need to be concerned about the sca, if not just have the sca checked when servicing the engine.
Or you may have my luck and loose it all., don't hurt quiet as much.
Over on yahoo CC site under files (coolant) is a paper from Cummins you might be interested in reading.
Good luck
Marvin

I can't agree that you if you replace coolant every 3 years, you don't have to be concerned with SCA level. You always should test a coolant sample at least annually. The SCAs in the coolant are sacrificial and if the SCA level drops out of the recommended contraction level then you are exposing your cylinder liners to cavitation. Go to a Cummins shop & get a couple of test strips & test a sample or take a sample bottle of coolant to Cummins & let them do it. Not doing it risks an engine rebuild.


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Old 07-29-2014, 09:04 AM   #8
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if you drain it, why can't you get the 50/50 in
It is generally considered difficult, if not impossible, to get all the coolant to drain from these class A's with so many long hoses, low points, etc. So, it is critical to know the total capacity of the coolant system.... not just the engine and radiator but all the heater hoses, motorcades, etc. That info must be obtained from the coach builder. My coach has a total capacity of 26 gallons.

The recommended procedure is to drain what you can, fill the system with tap water to flush and drain. Fill the system with distilled water, flush and drain. Then fill the system with enough full strength coolant to equal half of your cooling system capacity (in my case that would be at least 13 gallons of full strength coolant). Then you top off the system with more distilled water and test for freeze point.

When Cummins did mine, they did not follow that process but found a way to get most all of my system drained. They put 23 gallons of 50/50% mix in my system so they got pretty close to the max of 26 gallons. My freeze point tested -35 and the OAT test strip tested perfect.
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Old 07-29-2014, 10:23 AM   #9
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I recently had a complete drain, flush and refill at my Cummins Coach Care shop. I elected to go with OAT coolant. They used Fleetguard ES Compleat OAT. If you use Final Charge OAT you can always find that at truck stops.

What did that cost?
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Old 07-29-2014, 05:03 PM   #10
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I can't agree that you if you replace coolant every 3 years, you don't have to be concerned with SCA level. You always should test a coolant sample at least annually. The SCAs in the coolant are sacrificial and if the SCA level drops out of the recommended contraction level then you are exposing your cylinder liners to cavitation. Go to a Cummins shop & get a couple of test strips & test a sample or take a sample bottle of coolant to Cummins & let them do it. Not doing it risks an engine rebuild.


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You can check the sca or most any shop that service big rigs,including speedco can test the sca and add if needed. You can test yourself if you like. 3 years or 30k is what I seem to remember. I will keep my own up to date.
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Old 07-29-2014, 05:17 PM   #11
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The 30k or 3years I mentioned was if no filter installed. (You should drain and flush). You should check sca more often. My bad
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Old 07-31-2014, 04:35 PM   #12
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I'm new to this forum and this is my first post.

This topic is interesting. I have a Cummins 8.3 ISC. I couldn't see where anyone else has posted any OAT converter info.

5 years ago, I changed to an OAT coolant without draining hardly anything. I used Final Charge Global by Peak. It's approved for all heavy diesels. If your current coolant is up to date with the SCA's, you can get a 'Converter" solution from Peak that is added to your current coolant.

Drain out as much of your existing coolant as you can, change your coolant filter to a non-SCA filter and add the converter (in the appropriate amount for the remaining old coolant). Top off the system with some fresh 'Final Charge Global', and, voila!, you're done. Forget about checking SCA's. It's available in concentrate or 50/50. I got everything at O'Reilly Auto Parts.

Hope this helps.
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Old 08-01-2014, 06:53 AM   #13
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I'm new to this forum and this is my first post.

This topic is interesting. I have a Cummins 8.3 ISC. I couldn't see where anyone else has posted any OAT converter info.

5 years ago, I changed to an OAT coolant without draining hardly anything. I used Final Charge Global by Peak. It's approved for all heavy diesels. If your current coolant is up to date with the SCA's, you can get a 'Converter" solution from Peak that is added to your current coolant.

Drain out as much of your existing coolant as you can, change your coolant filter to a non-SCA filter and add the converter (in the appropriate amount for the remaining old coolant). Top off the system with some fresh 'Final Charge Global', and, voila!, you're done. Forget about checking SCA's. It's available in concentrate or 50/50. I got everything at O'Reilly Auto Parts.

Hope this helps.
Dave Trotter
01 Intrigue 11215
I drained my system 3 times(flushed with dironized water), pulled the thermostat.. The max I could get out was 16 gal, this including running the dash heat, I did not pull the bottom hose because of the situation at the time..my book states 29 gal in the system.. Even though the water looked very clean I did not want to mix that much.. When I put the Mobil HD w/sca back in with the thermostat installed, drained the engine block and the radiator.. I could only get 13 gal back in..I used a pump and measured very careful.. I don't know how much more would have drained by pulling the bottom hose..
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Old 08-01-2014, 09:45 AM   #14
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Quote:
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I drained my system 3 times(flushed with dironized water), pulled the thermostat.. The max I could get out was 16 gal, this including running the dash heat, I did not pull the bottom hose because of the situation at the time..my book states 29 gal in the system.. Even though the water looked very clean I did not want to mix that much.. When I put the Mobil HD w/sca back in with the thermostat installed, drained the engine block and the radiator.. I could only get 13 gal back in..I used a pump and measured very careful.. I don't know how much more would have drained by pulling the bottom hose..
With the thermostat out, pulling the bottom hose should drain all that can be drained. I am not sure how the guys at Cummins got 23 gallons of coolant back into my system but they did (my manual says I have a 26 gallon capacity). Perhaps they used compressed air to blow the system out???
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