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Deere 4630 with 6404 engine

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
No idea on hours, drained coolant to pull intercooler for changing exhaust gaskets. Coolant looks terrible, green. I have suggested replacing with either DCA based, or ELC to keep things in shape. Owner is concerned changing coolants will promote seal failure. I guess I've heard it before, water pump mainly, but what is the right answer?
 

mg2361

Senior Member
Joined
Jul 5, 2016
Messages
5,156
Location
Pennsylvania
Occupation
Equipment Mechanic
Deere's Cool-Gard II would be fine in that engine. But if the owner is that worried, then continue using a DCA based coolant.
 
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