cm 2250 injector

[Rawze]

(09-22-2023 )hct5 Wrote:  number 3 and 4 liners have dropped, step wear on the head. what causes the liner counterbores to wear out?

#1 cause and most common issue = A bad delete program. More then 90%+ of all delete programs are extremely bad for the engine, even before anyone adds any power to them.

#2 cause = The engine lugged to death below 1500 rpm its whole life up every hill, and failing prematurely because the liners were beaten to death in the engine block. Usually due to the rear ends being geared too tall and /or the engine being governed to only 1500 rpm. Also happens to bulk tank and car hauler trucks that use a lot of PTO, and lugs the engine below 1500RPM under heavy-use hydraulic operations.


Combine those 2 together, and you have an engine that will not stay together.


Also, as the engine block ages, the clamping forces get relaxed .. so if someone does not raise the liners up to about 0.015"or so during the inframe, then it will blow out in a couple years again, and the overhaul was for nothing / did not extend the engine life by one damn bit.
The link mentioned in my post above discusses the things that are NOT in the manuals towards actually extending the engines life that next million miles.
ref: http://rawze.com/forums/showthread.php?t...6#pid70606