CAT paid a lot of penalties in 1992 because they could not make a compliant engine for a long time, and the could not make an engine that was compliant for 2010, that is why they are not in the market. All this macho crap about what they told the EPA is BS. they were loosing market share, and could not make an engine that was fuel efficient, there engines weight to much, and the warranty costs of there products was way out of every other engine's, and they would not pay the full cost.
Before I left Freightliner I was doing a C15, with an intake Valve actuator problem on a Saturday, I got the print out for the things I had to inspect, adjust, and test.
First I was to do a valve set, and check the seals and oil supply, when I informed CAT that, to check the oil supply at the right rear of the block I would meed to remove the turbo's I was allowed to leave that out. After the set, tests, and the IVA test you have to drive the heck out of it for an hour to get the fuel out, then I was to change the IVA assemblies, from #3 position to #2 position, I informed Cat that the parts department was closing at 2PM, and would they allow me to order the part then and they pay the restocking fee if Fining would not wave it. I was told "NO". I swapped the part around did the set, and the test the code followed the assembly, this was before they allowed you to change just the solenoid. By that time the parts department was closed, I worked 3x12's Saturday was my last day. That truck sat there till I came back on Thursday, so much for customer good will, I had 8 hours on the truck already, and Cat wanted to Pay 4 hours for the complete Job. I told the guy no problem get a tow truck, they agreed to pay the full pull.
I truly pity anybody that owns anything from an "E" forward. Parts are to expensive, to hard to get. The number of times I had to cut the block on S60's in all my years, I did at least twice that on "CAT"s in one year.