coolant change
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Elder User
Joined: Sep 2007
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coolant change
Just got a 02 F450 coolant was a little low so I added a gallon of the green stuff.After adding the green stuff I read that it wasnt a good idea.I ran it for a day like that.I am planning on replacing the coolant with the red stuff ROTTELA ELC 50/50.What is the best way to flush the system.Does it have to be drained completely. My concern was if there were a little water left from the flush will affect the concetrate of the ROTTELA 50/50 premix.What is the 203 stat and billet housing every one is talking about. does make a difference where you live because I live in Hawaii. Any advice on the flush stat and billet housing .THANK YOU 
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
1. Get yourself about 20 gals of distilled water, the 203* stat, and billet housing.
2. With the engine cool, drain radiator & block (drains are on the rear of the block -- one is oil, don't pull that one!!). Remove stock stat and put stock housing back (doesn't matter if it leaks this is just for flushing).
3. Fill with distilled water, run truck for a few minutes to circulate. Repeat drain & refill with distilled.
4. Drain again and put your new 203* stat back in.
5. Fill with ELC.
Yes, there will be a bit of water in the block, and if you're really ****, you could get the non-premixed and add four gallons, then top off with distilled water, but it would work using 50/50 since it doesn't get cold there. Look here for the stat & housing (scroll down):
http://www.dieselsite.com/index.asp?PageAction=VIEWCATS&Category=203
EDIT: This would be a great time to install the AC mod as well. It keeps the hot coolant from flowing through the heater core when the AC is on Max. Makes it much cooler that way. I typically see 39-45 degrees now instead of 50s coming out the vents. It's also available from DieselSite here:
http://www.dieselsite.com/index.asp?...PROD&ProdID=21
Joe
2. With the engine cool, drain radiator & block (drains are on the rear of the block -- one is oil, don't pull that one!!). Remove stock stat and put stock housing back (doesn't matter if it leaks this is just for flushing).
3. Fill with distilled water, run truck for a few minutes to circulate. Repeat drain & refill with distilled.
4. Drain again and put your new 203* stat back in.
5. Fill with ELC.
Yes, there will be a bit of water in the block, and if you're really ****, you could get the non-premixed and add four gallons, then top off with distilled water, but it would work using 50/50 since it doesn't get cold there. Look here for the stat & housing (scroll down):
http://www.dieselsite.com/index.asp?PageAction=VIEWCATS&Category=203
EDIT: This would be a great time to install the AC mod as well. It keeps the hot coolant from flowing through the heater core when the AC is on Max. Makes it much cooler that way. I typically see 39-45 degrees now instead of 50s coming out the vents. It's also available from DieselSite here:
http://www.dieselsite.com/index.asp?...PROD&ProdID=21
Joe
Last edited by Izzy351; Sep 20, 2007 at 04:25 AM.
