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Hit & Miss Gas Engine Discussion

Kewanee valve cage needed


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  #1  
Old 03-25-2013, 02:38:47 PM
kpknutson kpknutson is offline
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Default Kewanee valve cage needed

I'm in need of an intake valve cage for a Kewanee 6. When I fanally got this out it came in the pictured two pieces and I'm told would be very difficult to piece together to cast a new one. These are very rare but hopefully someone can help. I know it would be asking a lot but possibly I could borrow one to have a copy cast. Progress on the engine is slow but I've got it resleeved, new tank being made, and a machinist lined up to weld up some broken castings. Also, I still have the contacts that called and e-mailed me last year after I initially put a letter in Gas Engine Mag and went on SmokStak. So don't be surprised if you get a call. Thanks for any help anyone give.
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  #2  
Old 03-25-2013, 03:39:12 PM
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David M. Lyon David M. Lyon is offline
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Default Re: Kewanee valve cage needed

??? Why would you be afraid to weld that one back together? The entire cage will be captive between the castings when installed on the engine and I doubt it would ever come apart if Mig welded together. it seals against the cylinder at the combustion chamber and is held against the outer casting with the two studs on the outer casting. I wouldn't shy away from welding it back together. I'd find it's original orientation, "V" the areas to weld, install a valve in it to keep the guide and the seat in the proper relationship, heat it up, and Mig weld it! ...Then lap the valve back in the seat good and use it. ....I can't see where you'ld ever have a problem.
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Old 03-26-2013, 12:14:26 AM
kpknutson kpknutson is offline
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Default Re: Kewanee valve cage needed

thanks for the reply. Problem I have is the picture doesn't show the breakage inside very well. Part of the guide for the valve is broken out and chunks are gone from the housing. The machine shop working on the rest of the engine didn't suggest trying to weld it up. Anyway thanks again.
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Old 03-26-2013, 07:57:10 AM
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Elden DuRand Elden DuRand is offline
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Default Re: Kewanee valve cage needed

If all else fails, you could fabricate a new one. Material wouldn't be too critical since its the intake.

My first thought would be to "whittle" it out of a block of lead alloy steel. Gray cast would be a little harder to machine, even something like bronze.

Or you could do a steel weldment.

It wouldn't be original but it would get your engine running. The way things work, just after you get the engine running with the fake part, a factory N.O.S. one would turn up.
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Old 03-26-2013, 09:14:11 AM
Bill Hazzard Bill Hazzard is offline
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Default Re: Kewanee valve cage needed

Just get a pattern maker to make a pattern and have a new one cast.
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Old 03-26-2013, 09:26:37 AM
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David M. Lyon David M. Lyon is offline
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Default Re: Kewanee valve cage needed

I still believe you've got enough left to reconstruct a usable cage. It might take some measuring and some time, and that's why the machine shop doesn't want to fool with it! I understand where they are coming from, time is money! It's one of those projects you have to do yourself. Nobody else is willing to take the time and effort and tie up a machinist and expensive equipment on a piece like that.~
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