well i was lookin at the back of the radiator this weekend in the little bit of free time i had and the radiator actually looks some what new. All of the fins are straight, and there is no stuff packed into it. I'm gonna replace the stat this week to see what it does. Whats the best way to flush the system? Thought about doin that to. instead of waiting on the temp to warm up enough to open the stat, couldn't i just keep the stat out while i flush it?

 

Go easy on the Green stuff. Engines run cooler on just water. If pulling hard in the summer rock nothing but distilled water, also there are high flow T-stats available. i have about a 4:1 of water to coolant and I pull a Moomba hard during the summer and I have not had an over heating issue yet.

 

Not sure if i wanna run just water or even a 4:1. i live in southern colorado and it can get cold outta no where. just thinkin i recently replaced the heater core, may as well flush the rest of the system to see what other 13 year old junk comes out

 

4:1? Like a 25% glycol and a 75% water mis? 50/50 is you BEST mix, hands down. Southern Colorado doesn't see the cold snaps we get and 50/50 is plenty sufficient.

 

I switched to mostly water in my small block chevy and got a ten degree drop. Was not that significant in the cummins but I havent had a hard pull this year yet. Plain water does more to dissipate heat. Also, too much glycol will be overly corrosive to the rad. With a 50/50 mix you should not have a over heat issue so most likely another prob.

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Ture. A good boil out of the radiator will be huge. Those water wetters dont do a thing and are a waste of money. I tried them in my motorcycles with no change, went to straight water(distilled) and they run cooler than before. Even at my four to one there is still enough to prevent freeze, but I aint telling you what to do, just works for me in washington.

 

alright i finally got around to changing the stat, had a busy weekend and also dealing with an apps problem. when driving the truck warmed up a lot faster, and watchin my pulse monitor i would climb to 204* it would say 0 (idk y) then just like that drop down to about 186*. my radiator looks pretty new, think i need a flush? or any other ideas, because i know it should not act like it is now.

 

did my flush tonight, actually ran it a little longer than i shoulda. then let the truck sit for bout two hours after rinsen as much as i could with the hose. blew everything out, let it sit for two hours. filled it up with prestone 50/50 extended life. started and ran truck with the cap off till the stat opened. filled it as much as i could then, closed the lid and let it idle for ten -fifteen minutes. then i ran her around and still the same overheating stuff. wonderin if i didn't get a bad stat. its like once i get to 205* maybe 210* it opens up and just cools her right down without an issue. try to take back my stat tomorrow and get another one. gonna run a 180* stat and see how we go.

 

Mine opens at 199 most of the time, and while cruising down the road it stays at a rather constant 190. Have you pulled the rad out yet and washed it?
AS for the pulse saying 0, its a software limitation. The old style EJWA's do the same thing. The new CTS's read above 200.