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I have the Zerex (Diesel Ready-Extended Life) coolant. I like the idea of neat-and-clean for the block plugs (near starter and oil filter). They look 3/8 npt, are they? I want to screw barbs into those locations and attach hoses to run out to the side of the truck.
I do not mind putting a few more dollars into this. Any suggestions to make this flush neat and painless?