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Farmall & IHC Tractors Discussion Forum
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Re: Farmall A, Round 3

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Author  [Modern View]

05-02-2013 06:58:03

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Thanks for the thoughts guys, I'm making a list.

This is easily the most frustrating engine I've worked on. Nothing I do seems to make it better or effect how it's running at all. When it is running it's just feels strained at high RPMs and just runs like crap at low RPMs.

Two other things.

One is a few yeas back my father was using the A and ran into a beam with the muffler. It snapped the pipe off where it screws into the manifold. The pipe was very, very thin from years of use so it snapped easily. I just pulled the manifold off, re-tapped (more like chased) the threads and installed a new pipe. I seem to recall it ran fine after that but that the point in time I wonder if it got cracked some how. I've sprayed it down with WD-40 and tried using a propane torch and I can't get it to run any different. For what it's worth partial choke doesn't help either. Unless it's internally cracked.

Would a head gasket make it run this way? I have no prof that it's a problem, I'm getting 93 PSI +/- a pound it each hole when it's warm. Just thinking out loud.



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05-03-2013 00:29:32

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 Re: Farmall A, Round 3 in reply to kopeck, 05-02-2013 06:58:03  
In your thread of Oct. 2012, Rustyfarmall suggested it might be an internal leak of the manifold. Such a leak cannot be detected by using the propane torch and it will not affect compression readings.
I tested my manifold by laying it on its side and the 6 ports, with which it connects to the cylinder head, up. Put a makeshift plug in the exhaust and poured water in one of the 4 exhaust ports until it was full. Look for traces of water in the intake ports and where the carb bolts up.
HTH, Hendrik

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