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Allis Chalmers Discussion Forum
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AC B Head ?

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Randy Knowlton

01-03-2008 18:20:46




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Just wondering about two styles of heads or valve covers I have seen, my 40 B (116 ci)has two studs through the valve cover, and I have seen pictures of four studs through the cover. Where they different for the 125 ci?

Thanks, Randy




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Randy Knowlton

01-04-2008 09:24:54




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 Re: AC B Head ? in reply to Randy Knowlton, 01-03-2008 18:20:46  
Thanks, Dick



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Dick L

01-03-2008 19:02:03




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 Re: AC B Head ? in reply to Randy Knowlton, 01-03-2008 18:20:46  
The difference is only in the age of the tractor. The first few years they just hat the two holes in the cover. The heads were the same. With two holes it had two long studs and two short studs to hold the rocker train down in place.



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loveshisallis

01-04-2008 16:05:15




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 Re: AC B Head ? in reply to Dick L, 01-03-2008 19:02:03  
If guy wanted to rebuild the head of a model B, how mcuh of a job is it and what do I need?



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Dick L

01-05-2008 13:03:49




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 Re: AC B Head ? in reply to loveshisallis, 01-04-2008 16:05:15  
The word (rebuild) has many meanings to different people. What would you like to end up with?
What most people think of as a rebuilt head is grinding or replacing the valves, replacing the freeze plugs, valve guides, and resurfacing both the firing chamber as well as where the manifold bolts on. That head can be plained .100 without loosing any of its integrity. You can port, polish, and enlarge the intake and exhaust ports. You can also put in larger valves.

The only thing you need is the desire and money. That is unless you are willing or want to buy machine shop machinery.

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