Casper RIP: Not with a bang, but a wimper.
Our 2005 LLY Dmax "Casper" might have lost a cylinder.
It didn't even happen while driving. Kat drove it, it ran fine. I went to drive it and it wouldn't start at first. I finally got it to start and it idled rough and was smoking white (diesel fuel, STRONG).
I just did a compression test on 6 of 8 cylinders (you can't get #4,#8 with my gauge), and the cylinders were between 295-320PSI except number 3 which was 240. It was a crappy gauge (Mity Vac?), so I need to do it again with a better tool.
There are 5 "normal" types of dead cylinders:
Head gasket (it's not using water)
Piston cracked (surprisingly little PCV blowoff)
Injector pushed out of bore (will replace clamp and retest)
Bad valve (rare)
Shortly after California Speedway with the GT42R (119mph pass) it started to make a little white smoke on start, and took longer to crank. We ran it at LACR with no problems except a blown intercooler hose (120.4 mph) and dyno'd it 755rwhp, 1360? TQ.
It ran excellent up until now except for the warm up smoke and the 3 second crank cycles.
The GT42R runs 75 deg hotter EGT's (1625 through lights), makes 80 more RWHP, and runs far higher boost 42 vs. 59 PSI.
Did boost do it? Did HP do it? Did TQ do it? Did EGT's do it? Did it's short brutal life do it?
Since we are taking the engine out in about 2 weeks to put the new one in, I'm not going to tear into it right now, well, except to perhaps replace the injector hold down on #3.
My theory that we would be immune to engine failure if we just ran fuel is probably not true.
I will do the autopsy to find out why, but I felt I must warn those of you running (or contemplating) big #2 HP of my experience.
Well, at least I probably didn't wreck the cores. Good night Engine #1, you were alot of fun, and will be missed.