Allis Chalmers C engine rebuild

RalphL · Oct 30, 2009

I recently bought a 49 C with the engine froze up. Can't find anyone to rebuild for a price I can afford so I've decided to try to rebuild it myself. I have been working with mechanical things all my life but have never tryed a rebuild. If any one has any advice about any do's and don'ts I'd appreciate it. Thanks

old · Oct 30, 2009

Are you doing a true rebuild or just a re-ring?? If your doing a true rebuild if you find cracks between the cylinder where the sleeve fit in that is common. Also use dish soap on the sleeve seals when you install them. I could go on and on but that takes up to much room here. I have done a good many of them and have a couple parts C engines laying around if you find you need parts. E-mail is open

bjb in TX from Ne · Oct 30, 2009

I have done two engines so far, an AC WC and a continental engine. The parts for a C are readily available so that isn't a big issue. The few extra tools needed (ridge reamer, cylinder hone) aren't terribly expensive. The only thing is the space to keep things organized. And have the proper reference material.
This book is very good on getting you started with the tools needed and a general how-to:
<a href="http://www.amazon.com/Rebuild-Restore-Tractor-Motorbooks-Workshop/dp/0760306613/ref=sr_1_1?ie=UTF8&s=books&qid=1256920156&sr=8-1">How to Rebuild and Restore Farm Tractor Engines</a>
Also the I&T manual and Allis service manual are needed for detailed info on your engine (both available from this site).
Finally this forum has a lot of helpful knowledge on problems and how to solve them.

BDT in Minnesota · Oct 30, 2009

RICH!! I was about to tell Ralph to give that C the "OLD TREATMENT" with the ATF before tearing anything apart..

That C may or may not be in that bad of shape.. Sure is worth a try!

DickL · Oct 30, 2009

You are welcome to look thru the many pictures of rebuild steps I have taken over the years. I normally have one or two open in the process of rebuilding at any one time and can get picture to help out with understanding most problems.
Stuck engine album starts with tear down. It has some other stuff parked there waiting on a better place. You can click on public home to get to other albums.
STUCK ENGINE ALBUM

old · Oct 30, 2009

Yep and it is only a $4 gamble to do it and you never know ATF does do wonders some times

old · Oct 30, 2009

You might go ahead and fill the cylinders with ATF and let it sit a couple weeks and see if it pops free. I have done that many times and have good running tractors that have not had the heads pulled in who knows how long. The ATF soaking does some times free them up and by doing so you spend $4 and save your self $1500 in parts. Ya it doesn't always work but it can be worth the gamble

DickL · Oct 30, 2009

I see 40 have looked at that album but none of these other ones that might give some insite.
MORE PIX

DickL · Oct 30, 2009

Kinda the same but different angles.

Lots more pictures in other albums.
MORE PIX YET

steve(ill) · Oct 30, 2009

i have done a couple motors without spending big bucks. if you pour oil in the cylider and get it running, it might be o.k., but still have unkown. If you tear it down, clean everything. pull the liners, replace o-rings on the liners, then hone and install new rings, and head gasket, you get by for $150-200. You then know what the motor looks like inside, and better yet you know it is clean. You can reshim the original bearings and lap the valves. One can make an argument that you dont have it perfect if cylinder bore is a litte out of spec, or valve grind is not quite right, but it is much better than just the penetrant trick. If you got $200, and a couple weeks of evenings to work, its a good idea and gives you a known quantity when done.

Allis Chalmers C engine rebuild

RalphL

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old

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bjb in TX from Ne

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BDT in Minnesota

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DickL

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old

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old

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DickL

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DickL

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steve(ill)

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