Head fire rings

[Rawze]

(05-19-2022 )Scooby d Wrote:  Thanks for the info ! A local shop suggested the fire ring thing to me and I was skeptical. My truck is still factory tune at 600 hp with all egr dpf still working. I have did the egr/dpf tuneup every spring and have learned how to take care of it but it still gives me some trouble. I use my motor in heavy haul so it gets a work out. I'm loaded between 130k and 200k every day with a lot of pto idling time so it gets abused. Lots of oil changes because I run between 2 to 3.8 mpg. I will pull the head today and see what needs done. I have moisture on the intake and exaust valves in number 6 and a dribble of oil on number one valve stem. I'm guessing a liner hight problem will be the issue. If I have to fix liners then I'll be throwing lots of new parts in it. Thanks rawze for that liner hight info.. I'll be checking that out.

If you do a lot of PTO ... similar to what car-hauler trucks do.. then you can blame the premature engine failure squarely on that PTO.. as these idiot car-hauler makes always set the hydraulic unit to require the PTO to lug the engine to death at 1000 rpm and less under higher loads.. severely shortening the engine life. - These idiots who design those hydraulic units are just that... IDIOTS!.. who have no clue that running an engine in its lowest rpm range possible to make hydraulic power tears them up rapidly.


If you get average of 3 mpg then that is why the engine failed with less than 400k miles on it. -- MAKE CHANGES SO THAT IT IS NOT TORTURED SO BADLY.. and do whatever it takes to improve those numbers drastically.. (re-gearing, etc.) and those high expenses of rebuilding it, etc. will not be nearly as often. - THAT is where your focus should be .. improving your operations, etc.. and equipment specs so that it can better handle what you need it to do so that it is not torturing the engine to a premature death. 200k loads... that thing should have at least a set of 4.68 rears.. but more like a set of 4.86's or 5.11's behind it... and the PTO, if used heavily, set so that the engine can run at 1550 - 1650 while the pto is pumping.

How many engine run hours are on that thing?.