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Old 12-31-2017, 03:21 PM   #15
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Originally Posted by wstalker View Post
My Lab report from JG Lubricants came back terrible for my coolant so I want to get the old out and the new in. I am going to change to the OAT type coolant. I have been reading forever. One thing I was wondering is has anyone used this flush kit from Prestone that you cut into one of your heater hoses. My rig is a 2005 Winnebago with the 400 ISL. It is a 2005 but the manufacturing date is 2004. Seems like an easy way to do this, but haven't seen much info on doing it this way.
Check the Cummins manual in your coach bag. Follow their recommendations for the type of antifreeze formula to use.

I had mine changed at a Pilot or Flying J service center on an earlier coach. Wasn't a problem. The tech messed up though and didn't tie a heater hose back up and it was burnt through by the exhaust pipe. Live and learn.

Some mobile techs will do it in place. It is a bit of a hassle. Flushing all the lines and then purging of air can be tricky. Are you getting a new thermostat at the same time? If so, consider having the engine breather changed. I understand they can get plugged over time.
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