If you get all the cleaner out with a prestone back flush kit you will have 100% water in there. Dump in a gallon of PURE 100% Mopar coolant, that should be pretty close to 50/50 as a start. Then split the other gallon of mopar coolant into the just emptied gallon and refill one with distilled water. You now have a 50/50 mix in one of the gallon jugs. Dump that in and use one of those prestone coolant testers to check the mix/protection level. If it's still low protection wise add more pure coolant till you get where you want it to be... Put the prestone flush kit on the old heater hose. When replaceing the heater hoses remember not to pull them off, slice them lengthwise with a razor knife, less chance of breaking the heater core bungs.
Remember to remove the overlfow tank and clean it out good then reinstall and fill it up to the hot mark, once you get it pretty much burped the system will pull the excess in as it finishes it's self burping. If you are putting a new rad in I would do the hoses also as well as the fan clutch seeing as how you have it all apart anyway...
1. Install backflush kit on old hoses. Flush system, add cleaner, follow directions and back flush. Remember to turn your heater on hot so that gets flushed too. The 7 hour flush works the best.
2. Remove old hoses, fan clutch and old rad. Remove and clean overflow tank.
3. Install new hoses, fan clutch, rad, tstat and new pressure cap.
4. Add gallon of pure coolant. Start topping off with 50/50 mix.
5. Test protection level with prestone tester [about $3, looks like a baster with squeeze bulb] If low protection level add more pure coolant.
6. Burp system. Done
I use the OEM Jeep hoses, they come with clamps, covers, spring and they fit. I bought them a couple weeks ago, it was either $60 or $80 for the complete set.
