Cummins NHC250 Head removal question

Kingpepsi · Feb 28, 2013

So i decided to pull the head on my truck to see how bad the cyl looks. Its the number 3 cyl so the middle head needs to be taken off. I have hit a road block. I have the head loose and it will move around quite a bit but it seems as though something is holding it down. I cant seem to free the passenger side rear corner of the head. Drivers side comes right up but something is snagging. Any chance that you cant remove the middle head without pulling the first head? Everything is removed from the head including fuel connection tubes, intake, exhaust, rocker boxes, push tubes. The TM says pull straight up and no dice.

Riftweaver · Feb 28, 2013

Is there something like a dowel pin engaged with close tolerance that is seeming to hold it?

Kingpepsi · Feb 28, 2013

Riftweaver said:
Is there something like a dowel pin engaged with close tolerance that is seeming to hold it?

I checked the TM and the figure doesnt show any pins. I can actually move the head forward and back 1/16" or so making me think there is no pin.

Vintage iron · Feb 28, 2013

There maybe a piece of debris lodge in the top of the cylinder and the piston.

swbradley1 · Feb 28, 2013

Pull it harder.

;-)

Welder Sam · Feb 28, 2013

Ouch.

Kingpepsi · Feb 28, 2013

Vintage iron said:
There maybe a piece of debris lodge in the top of the cylinder and the piston.

Oh there debris alright! I think i need a bigger prybar :-(

Just wasnt sure if i was missing something.

Ord22 · Feb 28, 2013

Good luck. We need pics.

rangereter · Feb 28, 2013

Start it up... and after you have oil pressure of course, put it right to the wood and blow it off just as if you had a stuck injector!
Regards, Bob

Kingpepsi · Feb 28, 2013

I'll make sure I take some pictures and Bob thats one **** of an idea haha only problem is i have a rogue rod and chunks of liner in the bottom of the motor. Could make for great fireworks though

swbradley1 · Mar 1, 2013

Pull the rod out and get rid of a few pieces, I'll bet she starts right up. Mine did.

Vintage iron · Mar 1, 2013

So what a Cummins 250 that runs on 5 cylinder would be a Cummins 208 ?

swbradley1 · Mar 1, 2013

Correct, with added vibration at no extra charge.

nopics

Kingpepsi · Mar 1, 2013

Heres the pics! All i can say is That don't look right :cookoo:

The head is garbage, the liner is gone, the piston was in the bore sideways, the connecting rod is bent, and the block is cracked. What a sound it must have made!

GHall · Mar 1, 2013

Wow.. A little JB Weld and good as new!

Triple C · Mar 1, 2013

Kingpepsi said:
Heres the pics! All i can say is That don't look right

View attachment 413302 View attachment 413303 View attachment 413304 View attachment 413305 View attachment 413306

The head is garbage, the liner is gone, the piston was in the bore sideways, the connecting rod is bent, and the block is cracked. What a sound it must have made![/QUOTE

Cracked block. Are you trying to salvage the motor or just interested to see what happened. Did you buy it knowing the motor was shot?

Kingpepsi · Mar 1, 2013

I knew it was shot when i bought it. Curiosity got the best of me and I really needed to see what happened. I have another motor lined up and im just going to swap it.

swbradley1 · Mar 1, 2013

That is a pretty cool looking piston. Great desktop paperweight conversation starter.

rtk · Mar 1, 2013

And the " DRIVER " said I was just driving along and it stopped running , never heard any noise !!!!

Vintage iron · Mar 1, 2013

That is possible. It can just seize like that! I am sure the damage was done at the motor pool or reserve station.

Cummins NHC250 Head removal question

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