GeneV
Elite Member
Somebody be a pal and do a quick in-service on it. What's the procedure, are you flushing and what are you using (distilled or no?), what coolant are you using and how much does the radiator hold?
I drain and refill at each engine oil change.
100 hour OCIs after the inti 50 hr.
I drain the radiator and reservoir and refill. Less than 1 gallon. I use Case XHD premix.
The 100 hour OCIs mean at least once a year for me.
Ok, so you just drain/fill, no flush? I was reading about sca's for diesels, looks like your case xhd has that. That's part of why I'm asking, manual doesn't say anything about coolant additives.
Ok, so you just drain/fill, no flush? I was reading about sca's for diesels, looks like your case xhd has that. That's part of why I'm asking, manual doesn't say anything about coolant additives.
Nothing too fancy regarding benefits other than they offer extended life if you have an aluminum radiator, and you don't have to mess with SCA's. The flip side of the coin is trying to decide which chemistry is best. Do you want silicates or not? How about nitrates and nitrites? Does my coolant have 2-EHA in it and is my engine compatible with it? What's the problem with Dex-Cool and universal types? HOAT or OAT? And the list goes on. Dealing with coolants is far worse than selecting engine oils. I've found that the two mentioned above are some of the best. Following the ASTM D6210 spec is a good idea, and many like to see the CAT EC-1 spec also. Avoid coolants that are ONLY rated as ASTM S3306 and/or ASTM D4985.
Nothing too fancy regarding benefits other than they offer extended life if you have an aluminum radiator, and you don't have to mess with SCA's. The flip side of the coin is trying to decide which chemistry is best. Do you want silicates or not? How about nitrates and nitrites? Does my coolant have 2-EHA in it and is my engine compatible with it? What's the problem with Dex-Cool and universal types? HOAT or OAT? And the list goes on. Dealing with coolants is far worse than selecting engine oils. I've found that the two mentioned above are some of the best. Following the ASTM D6210 spec is a good idea, and many like to see the CAT EC-1 spec also. Avoid coolants that are ONLY rated as ASTM S3306 and/or ASTM D4985.
I drained the block and radiator, flushed then filled with Zerex G-05 50/50 pre mix on my GC1710 last year.
K7LN, thank you man!
Ok, so to clarify, some of you guys are flushing and some not, can we get a consensus on this? And if flushing, are you using distilled water? Am I just draining the radiator and overflow tank, or is there something else to it? And as somebody else asked, where are you guys taking the old coolant for disposal?
Thanks much for the info!

I have a 231s as well. It had 400 hours when I bought it, has almost 700 now. I have never even thought about changing the coolant. I also didn't know a diesel required a different coolant. Should I change it or leave it alone?After reading about all these fancy coolants, I guess I had better drain the coolant my MF 231S and use one of these new, fancy coolants. BTW, what are the benefits?
I have a 231s as well. It had 400 hours when I bought it, has almost 700 now. I have never even thought about changing the coolant. I also didn't know a diesel required a different coolant. Should I change it or leave it alone?