Coolant Question

[Beluga Bus]

Replaced a few hoses on my 4-71, if currently has green Prestion coolant. Should i refill with green coolant, or flush and change to a Diesel elc coolant?
Thanks,
Matt

[Jon]

The colors are meaningless because all manufacturers are now using designer colors to identify their products. You just have to select a coolant that meets the spec from the engine manufacturer, and decide if you want to go with a 2 year coolant or an extended life, usually 6 years.

[luvrbus]

Use the Detroit spec 6038M and you will be fine for your 2 stroke engine,I buy the Alliance brand (green) from FreightLiner the Prestone that meets 6038M works too,watch the Walmart stuff

[TomC]

71 series has dry liners. Use the Prestone-use concentrate then buy your own distilled water to add 50/50 to it (why pay them for the water?). Good Luck, TomC

[chessie4905]

Our Walmart now caries Rotella HD antifreeze for diesels. About 13.47 per gallon.

also Zerex zxed1 HD at Amazon about same price on case of 6 with prime free shipping..
https://www.amazon.com/Zerex-ZXED1-Extended-Antifreeze-Coolant/dp/B0033QVL9C

Check at bottom for 6 gallon case price.

[Beluga Bus]

Great info guys! I will see what NAPA has that meets the Detroit specs. I agree Tom, why pay for water in the coolant when distilled water is so much cheaper.
Thanks,
Matt

[luvrbus]

Here we go let the s*** hit the fan Detroit never said use only distilled water for the 2 stroke engines R/O is better because of the acidity contained in distilled water. 

.The new designer type long life antifreezes are pre-charged to use distilled water the Green is not, you buy chemicals for the Green stuff using distilled water .

I never had to buy chemicals for the Green using R/O water and a water filter, at almost a buck a gallon for distilled water is a waste of money IMO   

[Beluga Bus]

Thanks, learn something new everyday. I always though R/O water had ph issues too.

[loontus]

Evans NPG is my choice when I have to flush & refill.  No water - no worries.  Expensive?  Yes, but you never need to flush & fill again.  It is true PERMANENT coolant (DON'T call it antifreeze, they don't like that).
Dave

[Dave5Cs]

NAPA Fleet Charge or Final Charge.
Dave5Cs

[loontus]

"NAPA Fleet Charge or Final Charge" has water in it, Evans does not.  It is just Glycol (special formulation) with no water needed or wanted.  No water = no corrosion!  No need to ever flush & fill again.  Boiling point apx. 372° at atmospheric pressure, no need for a pressurized system!  (I have no financial interest in this product or company.)
http://www.evanscoolant.com/

[Dave5Cs]

Do you have a name and maybe some where close to what state you are in so we know who we are talking too. put it in your profile.

As far as the waterless coolant thanks for a heads up on that. But for 45.00 a gallon and we only put on maybe 5,000 a year or less I will take my chances with Fleetcharge. But thank for the info.
Dave5Cs

[luvrbus]

In the 15 years I have heard about Evans I have found not 1 diesel engine manufacture that has approved it in their engines why ?.  

Detroit,Cat and Cummins reps all told me it was a no/no for their engines.It sounds good though except the no pressure cap deal on the system I don't think would work out to good.

In fact I would bet a cold one with the water jet nozzles in the heads of a 71 series there is no way it could work JMO but this is starting to sound about the same as a Amsoil pitch       

[chessie4905]

Here's an interesting read on Evans npg. Of course it is from a competerer but it does show some actual testing. I am somewhat concerned about engine operating temperature increase. Some swear bout the stuff though.

[DoubleEagle]

The possibility that the engine will run hotter should be a reason to not use Evans in a 2 cycle. We need all the cooling we can get climbing grades, and if it was never approved by Detroit Diesel, it's a no go.