CAT C15 /6NZ trouble continues

That sounds like exactly what happened when I dropped my num 6 injector cost me a cam and rocker also

 

Only 3300 on that day but my cat guy is only 99 an hr

 

Pa. I can travel anywhere.

 

well I am shaken to read the latest update. we just managed to get Cat to agree to warranty six new injectors for my engine even though it is out of platinum warranty from the in frame rebuild. we have to eat the labour though, but happy to since it was such a struggle to get them to agree the problem was on them since the issue was brought to their attention well before the warranty had expired.

it sounds like it was better for at least a little while wasn't it?

 

The reason the injectors fixed it for a while is because of the new O rings not letting combustion gas past into the fuel rail.

If you cut the seats in the head that will stop the combustion gas getting to the O rings and burning them up.

It's not the injectors or the Orings that are the issue. It's the seats in the head the injector seals against. There warped and need to be trued up .

I'm going out on a limb here but I'm going to say your higher then normal coolant temps are a result of the air getting into the fuel rail.

This will cause retarded injection timing . The injector is not full of fuel anymore. It's got air in it and the spray pattern will be broken up and late to the party. Retarded inj timing will cause higher coolant temps.