This weekend I want to drain the radiator and put some new antifreeze in just because it hasnt been done in a while. Do I need to add any additive to the coolant so it doesnt bubble from all the vibration, I had heard you have to do that on Ford's from vibration and CTD vibrate just as much if not more...the trucks a 95 12 valve thanks

 

I don't know about additives but you should use distilled water rather than tap water to avoid scale build up. Also, be aware that there will be almost 5 gallons coming out of the radiator drain valve. I just drained mine into a 5 gallon spackle bucket the other day and it came up about 4 inches from the top.

John