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power cells

1

1031D

Well-known Member
I'm trying to button up my 1955 400 diesel. One power cell was cracked and getting replaced. One was an old style without internal threads for a puller, and while not cracked someone beat the crap out of it at some point and time. I drove it out with a 1/2" steel ball and a skinny drift. Should I run it, replace it or polish it?
mvphoto19068.jpg
 

The early ones were the threaded ones and later you had to remove them as you did. Is the angle the same all the way to the hole? It looks like there is a step but maybe that is just the light shining on it. It should be straight so the fuel is injected into it without turbulence where it fires.

If you are resurfacing the mating halves they must have a perfect metal to metal seal or hot combustion gasses will eat right through any imperfections.
 
mEl, there is about an 1/8" deep hole from some dingleberry beating on it with a punch. The other power cell body pieces have been stone lapped perfectly flat and smooth. I guess I'll have to round up another body.
 

1031,

Yes, that damage would affect the fuel spray entering the power cell, in all actuality, the combustion chamber for that style engine. I believe that is the reason that those style engines have such a smooth broad torque range, the burnt gasses are being metered out to the piston in effect by the size of the powercell opening. That is just a theory of mine and subject to discussion of course as there is nothing lacking in Case's open chamber design and certainly some advantages to that system as well.
 
I know for a fact the power cells help with the deep lugging
power!! Look at a 1030 vs a 1070 in a tractor pull!! 1030 will
out pull the 1070 every time with less hp but probably 10x the
lugging power!!
 
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