Big Engine Damage
 

For the PPOT Brain Trust:

2008 Navastar (International) DT466 - 6 cylinder in line diesel. Was running just a little bit rough... Loss of power, no lights whatsoever on the dash (and there are MANY) were lit up.

So my question is, what do you think happened? My mechanic says the bent pushrod is from #4, and the bad lobe is #2. I can't make sense of that.

http://forums.pelicanparts.com/uploa...1456866229.jpg

http://forums.pelicanparts.com/uploa...1456866255.jpg

#2 Cam lobe
http://forums.pelicanparts.com/uploa...1456866285.jpg

http://forums.pelicanparts.com/uploa...1456866318.jpg

Another lobe starting to go:

http://forums.pelicanparts.com/uploa...1456866353.jpg

http://forums.pelicanparts.com/uploa...1456866397.jpg

What I think is a good lobe:
http://forums.pelicanparts.com/uploa...1456866429.jpg

Whoa! Lots of "bluing" (heat) on that camshaft.

It looks like your engine s*** itself.

cam metal looks like it was full of airbubbles

when I got a core motor to rebuild for a 455ho gto
the cam had wiped out two lobes
but they were wore down WITHOUT PITS OR HOLES

i WOULD E-MAIL THOSE PIC'S TO THE CORPS REP
a bad casting with tooo much air intrained prior to machining is my guess

Thanks. The engine had 150K on it, and I was told the driver must have miss-shifted. After I saw the parts I started to wonder.

Dang. That cam is a disaster yo. How many miles are on it?

150,000 miles on the odometer, but the truck was purchased used. Actual mileage may be less.

http://forums.pelicanparts.com/uploa...1456870729.jpg


http://forums.pelicanparts.com/uploa...1456870741.jpg

Typical Binder. Fix it sell it buy a truck with a Cummins

Binder?

In the rubber industry, we call all those tiny bubbles....porosity. Never seen it in a cam lobe, but obviously, the cam maker had a heat issue while molding the cam. Possibly not a long enough cure time, or excess gassing.

I buy the over-rev. theory. Lobe wear is one thing, but lobe chunks and bent pushrod? Manual trans?

G

Corn binder some times referred to as a 13 letter s&!t spreader.
Like Dan said rebuild it and get rid of it.

http://forums.pelicanparts.com/uploa...1456873152.jpg


This grove worn into the cam is not from over reving. I'll go with bad cam. Improperly hardened.

Engine has been rebuilt. I am not up on California smog rules as I should be, but a Cummins swap would strike me as not at all possible.

One can of Engine Restore or Slick 50 you'll be good to go :D

Don't swap motors swap trucks. We just traded a 2011 International with a Maxxforce motor(most unreliable motor I've ever seen ) for a new Kenworth with a 485hp Paccar motor.

Rebuilt with a ****ty cam I think. Was the oil pressure good?

I know nothing about this engine, but I wondered the same...oil starvation?

Dr McCoy pointing to never seen before member of the Star Trek security landing party wearing the red uniform shirt:

"He's dead Jim"