two stroke, I dont know what mechanics at ford and international told you that, but , well, they know nothing. They are flat out wrong. Have them check their specs. Thats the problem I run into around here. becasue they are mechanics and work where the piece was made, does NO)T mean they are knowledgeable about their products. When you go back to those places, make sure that you are armed with more than they are, take your dog to argue with them........LOL

 

The DMAX can run that hot because of the water jacket. It prevents the block from getting much hotter than the water temp.

 

900 post turbo would be my max if I ran post turbo. There is no set number. Different conditions have different heat lose. Rubberduck is goona report on this soon as his truck came with post turbo and he is adding pre turbo.

Also for short times higher temps are ok. Heat transfer, intake air cooling, oil jet under piston all help cool the piston even during high temp runs.

Also you must all remember that heat damage isn't instant. Meaning if you take your truck over 1250 degree once your engine will blow. It gives a false sense of security. Heat cracks take a while to do their damage. Do it enough times and you will crack you piston. If your luck you won't won't window your block!

For the OP I would remove the 10K mod and see if it does the same thing. Also I wouldn't two heavy with it in until you get a pyrometer. And yes K+n filters are bad especially the drop in one for the stock box which is what I am guessing you have. A k+n filter can destroy and engine faster than high EGT's. Some have had good luck with them but I have not seen a single one first hand that worked well. out of the three powerstroke I know around here that Ran them. One I replaced the engine because of it. The second needed the engien replaced because of it and the thrid is still going strong. I would want a 1 out of 3 filter in my truck! They let too much dirt past in the filter and they don't seal at all in the filter box.