Roughly how many gallons of distilled water should I have on hand for the flushing process. I know it's impossible to say for sure, but if you were to make a ballpark estimate.Drain cooling system using radiator drain, block drain plug, oil cooler hose, empty reservoir. Refill everything including reservoir with distilled water, run engine & heater to operating temperature, shutoff engine, cool to a level you won't scald yourself, drain, repeat until drained water looks clean.
Evacuate air & re-fill with coolant using this (or similar):
Amazon.com: UView 550000 Airlift Cooling System Leak Checker and Airlock Purge Tool Kit: Automotive
You can also refill manually & try to bleed the air out.
You using a cleaning product most likely had nothing to do with your HG blowing, doing it incorrectly or it was just it's time to go.Anyone have a recommendation as to whether I should flush my cooling system on my 2008 Nissan titan when changing the antifreeze. My concern is that with 160, 000 miles I could be doing more harm than good. I would just be flushing it with distilled water. Not a bottle of radiator flush or anything. I ask because I've always stuck to the idea that flushing a transmission after not having it regularly flushed can be a bad idea. Being that you could loosen up junk you don't want loosened up. I used a bottle of radiator flush on my 1997 Nissan hard body once and ended up with a blown head gasket shortly thereafter. Hard lesson learned. I will NEVER use radiator flush ever again. It blew out a weak point in the head gasket