Originally Posted by Kyle_1724
Ok thanks for the info. I will go to a truck shop and pick some up. So I Dont have to remove the thermostat? I can do the flush with it in? Thanks
If you use the flush kit...then I don't feel it is necessary. Especially if the thermostat is working fine. I know a lot of people replace the thermostat when they flush but if it is working why mess with it. I have do the back flush on four different vehicles and only changed the t-stat on one of them. All of them seem to run just fine.
Here is more info than you would ever want on coolant.
Coolant changing instructions... - Diesel Forum - TheDieselStop.com
When I flushed, I drained the radiaor with the truck facing down hill, added restore. Ran the truck for 20 mins, emptied the radiator and block plugs. Back flushed twice. Filled with distilled, ran until warm, and emptied three times and finally added coolant. I did that to both my truck and my fathers...both worked just fine.