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CA Head question
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bjacobs113 View Drop Down
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Joined: 19 Jul 2021
Location: Freeland, MD
Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bjacobs113 Quote  Post ReplyReply Direct Link To This Post Topic: CA Head question
    Posted: 19 Jul 2021 at 1:25pm
Hi all. I'm new to the forum, and new to working on old tractors. I just picked up a 1955 Allis Chalmers CA. The motor was froze, so I had to remove the head. There is a part in there that is not listed in either of the service manuals I have. It looks like some sort of oil catch basin. It sits under the rocker arms against the top of the head and runs the length of the head. It has only one hole in the rear lowest part where it looks like oil would return through. I attached a picture of it. Can anyone tell me what this is and why its needed? Since its not in any manuals that I've found, I'm tempted to just leave it out.
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PaulB View Drop Down
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 5049 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2021 at 1:42pm
That is a splash guard to keep oil away from the valve guides. Back then they didn't use stem seals. I've experienced tight exhaust valves after a head rebuild using stem seals. I'd use that, you don't often seen them still in engines. If I do have to use stem seals, I only put them on intake valves.  
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 87322 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2021 at 1:49pm
there were a LOT of the motors built without the oil splash guard.. At one time , some thought the were on the stationary generator engines only... but a few have been found on tractors... WHY ?   Nobody knows.
Like them all, but love the "B"s.
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Alberta Phil View Drop Down
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Joined: 13 Sep 2009
Location: Alberta, Canada
Points: 3908 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alberta Phil Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2021 at 5:49pm
I have three 'B's and only one has that splash guard.  All run just fine with or without.
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