Casper RIP: Not with a bang, but a wimper. - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 13 (permalink) Old 02-08-2007, 02:18 PM Thread Starter
 
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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)
Rod bent
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?

Not sure.

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.
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post #2 of 13 (permalink) Old 02-08-2007, 03:03 PM
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It didn't go out with a bang, thats good. Will you be building an engine? My guess is a head gasket. Since there are no studs, that is usually the first thing to go.

2001 Chevy SB/CC Duramax LB7

Garrett GT4088R from PPE, PPE Duel fuelers, PPE Tuning, PPE stage 4 transmission w/suncoast 1056 converter, PPE Lift pump, Fabtech tie rods, Black Eagle alloys.
Engine is apart and in the garage
Goal is to have it done by the end of this summer.
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post #3 of 13 (permalink) Old 02-09-2007, 02:10 AM
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Bent a rod....

It lived a good life. We all knew it was coming, just a matter of when

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post #4 of 13 (permalink) Old 02-09-2007, 04:18 AM
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Yep...kinda like when Brandon blew the turbo last spring at Smokin. With the abuse he put it through...it was surprising that it lasted that long.

And just think of what everybody learned from engine #1 Pat.

Can't wait to hear that Casper is back to good health and running perfectly.

Dave
post #5 of 13 (permalink) Old 02-09-2007, 10:52 AM
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Sorry to hear about it Pat. I guess you had to expect it to happen eventually, what with using stock internals with that big charger and dual fuelers.
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post #6 of 13 (permalink) Old 02-28-2007, 10:39 PM
 
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Pat, any new news on the engine? How is the new build coming along?
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post #7 of 13 (permalink) Old 06-22-2007, 05:40 PM
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Whats the word on Casper?

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

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post #8 of 13 (permalink) Old 06-23-2007, 10:27 AM
 
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casper is running 10.95s in the 1/4 mile with the new motor
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post #9 of 13 (permalink) Old 06-23-2007, 05:39 PM
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Quote:
Originally Posted by dmaxvaz
casper is running 10.95s in the 1/4 mile with the new motor

post #10 of 13 (permalink) Old 06-24-2007, 06:34 PM
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I saw it!

2001 Chevy SB/CC Duramax LB7

Garrett GT4088R from PPE, PPE Duel fuelers, PPE Tuning, PPE stage 4 transmission w/suncoast 1056 converter, PPE Lift pump, Fabtech tie rods, Black Eagle alloys.
Engine is apart and in the garage
Goal is to have it done by the end of this summer.
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