Cascade Crew

chevymad

Found this video done by a machinist. It illustrates just how easily a heavy duty diesel block can be distorted.

http://youtu.be/6cLjdr2GSwU

aaron_sK · Posted: Fri Dec 23, 2011 10:10 pm Post subject:

Hehe

Diesels distort as they run. That's what causes the cavitation of the coolant and then you get block worm.

IROCDave · Posted: Fri Dec 23, 2011 10:22 pm Post subject:

Nice find.
I find it hard to believe that pressure applied by hand could make the block / cylinder distort enough for the guage to fall out, especially on a diesel engine. It does come in a dodge so maybe it's legit?

It would be interesting to see what thermal expansion does to the bore after the tourqe plate boring was done. Of course that would be with the head studs installed and tourqed.

Twilightoptics · Posted: Sat Dec 24, 2011 9:55 am Post subject:

Now put it under 45psi of boost for 25min pulling 80,000lbs up a mountain pass.

Yeah, yeah, everything is distorted.

QwkTrip · Posted: Sat Dec 24, 2011 11:11 am Post subject:

They must get their music from the same place as CAT.

chevymad · Posted: Sat Dec 24, 2011 12:02 pm Post subject:

I was watching a tractor pull vid one time, and the camera zoomed in on the head of the diesel as it was pulling. I think they said they were pushing 100psi (possible?) Anyway, the announcer was pointing out how you could see the fire and smoke belching out of the head gasket as the pressure lifted the head. This was a normal run too, not one where the motor blew.

blue89 · Posted: Sun Dec 25, 2011 7:47 pm Post subject:

I dont buy it. If the head bolt distortion was causing 0.002" how much would you cause by hand?

QwkTrip · Posted: Tue Dec 27, 2011 1:57 pm Post subject:

Everything moves. Question is what is an allowable amount?