ECT's in the 240 range. I'm not puking coolant. No residue around bottle. The fan seems to be coming on just fine. I had the radiator out when I did the water pump and washed the outside really good and reverse flushed it. It seemed to be flowing well. Someone else told me that I really need to get a IR thermometer on it and check for dead spots. I guess that's my next course of action.?

 

So coolant temp is in the 240 range and oil is 262??? Am I reading that correctly? At what temp is your fan coming on?

Man this really has me scratching my head, the cooling systems on these things are ridiculously good. I guess it's possible you got a bad thermostat out of the box, but that seems SO unlikely...

 

Fan doesn't come on full unless I'm loaded. If I'm running empty and she gets this hot the fan comes on but you don't get that full airplane propeller roar. It's not the thermostat. I took the old thermostat and punched out the guts to see if that was it. Still gets hot.

 

So those temps are correct? 262* for oil???

You can test a thermostat by throwing it in a pot of boiling water and seeing if it opens. A gutted thermostat may very well let it overheat too. The thermostat not only open/closes as it should, but the design in itself is there to restrict coolant flow. If coolant flow is too strong, it wont have enough time to dissipate heat in the radiator. It needs to have a nice slow pass through there to let the radiator do it's thing. Obviously if you have a new thermostat in there it's not the issue though.

If you're getting this hot with no load on it, something is definitely awry here. How is boost? Are you getting any unusual smoke from the exhaust?

 

Yes, the oil got up to 262. It takes a good hour to get this hot empty and that's stomping it pretty good. Per your advice I went with an SCT tuner and I'm running the mid range custom tune IDP sent me. I decided to spring for the Livewire so I could get all these numbers.

No unusual exhaust. I haven't paid much attention to boost but I know I've seen it up to 20 psi.

 

Crazytown... It sounds like you have done alot of work with not much to show as far as results go. I have had myself a little run in with something alot like what you are describing. First off let me explain, Bought a used truck and 1st time I hit a hill with a load it overheated. Changed thermostat, coolant, and water pump... 2nd hill same as the 1st
. I pulled out the radiator and even though it looked clean installed it was packed with fine dust that looked like the inside of a vacuum bag. I sprayed out the fins real well and re-installed it. That made it much better but, If I had the A/C on it would still get hot on a long grade. I talked to a radiator guy and he said it sounded like the core needed to be rodded out (internally blocked). While he had the radiator I went ahead and changed the fan clutch even though it seemed to be just fine and ramped up like the jet noise you described. What I do know is this, after the rodding out of the radiator core and a new fan clutch it never overheated again... (over 100k since then)

I don't want to give you something else to chase your tail with but, maybe a call to your local radiator guy might help?

 

I think that has to be my next step. Keeping my fingers crossed.

 

c-tane that's wild. I would have never even thought about that.

Please keep us posted, I wish I could offer more help but I'm running out of ideas myself on this one...

 

If I have to replace my radiator do y'all have any recommendations?

 

Stock ones seem good!? I know Mishmoto makes some too, I believe they're a sponsor here, or at least they were at one point.