6nz flashed to c16 need help

I'm not certain but it's possible a factory C-16 has a different water pump or thermostat housing or something else in the system that allows it to flow a greater volume of coolant through the system. It could also be something as simple as a variation in the sizes of the pulleys that Cat specs to drive the fan on a factory C-16 engine, as a faster driven fan would obviously pull more air across the radiator. Could be lots of different things, but if you're confident everything is functioning as it should, I'd start checking part numbers on everything in the cooling system and related components to make certain they were identical across both engine families.

 

The 6999 is a pretty hot code for a stock 6nz. Depends on which file he used if it was 7cz I would run a 5232 code and ride. Of course the 58 injectors or a marine cam would be the way to go but the factory 6nz will do fine. I don't know which turbo you have but it could be getting overworked causing the heat issue.

 

the 6969 crap is prolly the problem only runs 1000 but some cylinders are way hotter than others when it mixes in the turbo it looks good comeing out the back side put the stock numbers on an see for yourself

 

another thread soon to be docked & deleted, sad but true.

 

The C-16 has a different crank with a longer stroke creating more cubic inches, and there is no substitution for cubic inches. You can put all the "hot" codes in it you want but if you don't have the cubes to use it efficiently your just blowing smoke literally. Hauling heavy is the biggest contributor to the excessive water heat, and the wrong codes are just compounding the problem. IMO(and just my opinion) He should go back to a 550 heavy haul/brake-saver flash, and code the injectors correctly, if that doesn't do it for him then he can upsize the turbo and injectors, and there are several people on here that are way more qualified to advise exactly which ones will give what results.

 

they get deleted because of to much goverment control

 

These normally turn to people making recommendations to go to the aftermarket world with ECM tunes etc. Those are the types of discussions that we do not want here, a good rule of thumb is, if you can go to Cat, Cummins, or Detroit and buy the parts or get the work done, then it is ok to be talked about here.