NEED HELP QUICK!!!

[AFSP1211]

I gotta make a 1500 mile trip tomorrow and my truck's overheating. Took out the 160 stat and replaced with 180, replaced fan clutch. flushed radiator with the water hose for about 30 mins at running temp, and it's still overheating. I don't know what else to do. Not leaking anything either. It's getting up to 235 maybe a little past then it'll drop back down around 190-200. then it'll go back up a few mins after that. If I run anything over 2000rpms it starts getting hot and stays hot. The overheating doesn't start till I get on the highway at a constant 70 mph. any ideas???

[SCIV]

Did you follow the "burp" procedure? Sounds like air pockets or cavitating (SP?)

[AFSP1211]

Just read how to do it so I'm gonna try that right now. Any more suggestions? Anyone?

[RedHeartbeat]

fill the engine through the top radiator hose with the radiator end removed.

[1BADC10]

air pocket... i was park on incline, or jack up the front end. fill thru rad hose like Red mentioned til it won't fill anymore. reattach rad hose, and up cap reservoir. when the air pockets escape, you'll see the level drop in the bottle. add to cold fill line, cap off, and test drive.

[AFSP1211]

Tried burping and filling on an incline, still didn't work, now the truck's at the dealership. Bad thing is I have t be back in North Dakota by 5:00 am on the 15th. Hope they work fast.

[diablotruck]

That happened to me on my 99 last year and it was one of the hoses that would colapse. I didnt notice it till I was checking everything and reved it and sure enough the bottom hose was collapsing. mario

[RedHeartbeat]

Weak hoses would definitely collapse. They used to put a wire coil inside to hoses to prevent that. I guess they quit doing that.

[AFSP1211]

First thing i did was check all the hoses and they all looked good. No cracks or dry rot or anything. I just have to wait till tomorrow morning for the techs at the dealership to look at it. I'll keep ya'll informed.

[567234ta]

make sure you use new bolts on the thermostat housing. it might be okay since its a newer truck but on my l31 the bolts were aluminum and one snapped while i was on the highway once from being taken out then back in. it really weakens them.