I know it's been asked a million times already....I've read a bunch of search results.

I'm almost positive I need to to get the Zerex G05 HOAT coolant for my '04 Dak with the 4.7, but I just want to make sure that that's already what's it in.

I bought it with 95K on it, don't know if it's ever been flushed but I doubt it based on the fact that most everything else on the truck was original, including spark plugs and all other fluids, has 107K on it now.

The coolant is still really clean and is effective down to about -45 on my hydrometer, but my radiator rotted out and is sagging at the bottom and starting to leak so want to make sure I don't mix the wrong stuff back in after I replace it.

Anyway the stuff in there is a light orange color. Owner's manual states to use a HOAT coolant so I can only assume that's what's in there based on the color and the owner's manual.

Seem like a safe assumption? Zerex G05 should be what I need right?

 

Flush out the system with distilled water, then replace the radiator. A single gallon of concentrate coolant mixed with another gallon of DISTILLED water will yield two gallons, enough to do the job. To mix, pour the concentrate into a bucket then pour the distilled water on top of it.

I recommend this radiator due to it's greater capacity. It will cool better than the ones you see at the auto parts store.

 

HOAT (G-05) is what came in the truck. Give it a good flush and then refill.

 

yep, you want the CSF. Damn good price, too. Happy with mine after 2 years.