Which valve set?

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Fordman
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Tractors Owned: 1952 Farmall cub
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Which valve set?

Postby Fordman » Mon May 08, 2017 9:20 am

Having my 52 cub engine rebuilt, the builder said I need to get new valves, guides ect... Was wondering if you guys have any recommendations? I heard people talk about hardened seats? Is that important? Iam doing a total restore of this tractor and plan on keeping it as long as I live so I really don't want to go the cheap route. Any help appreciated! Thanks :tractor: p

Eugene
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Re: Which valve set?

Postby Eugene » Mon May 08, 2017 9:39 am

If the valve seats can be cleaned up, I would do so. There is considerable expense in cutting in and installing new valve seats. The original engine in many running Cubs still has the original valve seats.

Depending on the condition of the valves, price wise its about a wash, purchase new valves or have the current valves faced. I would go for the new valves.
I have an excuse. CRS.

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Urbish
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Re: Which valve set?

Postby Urbish » Mon May 08, 2017 9:40 am

Hardened seats are important on old engines designed to run on leaded fuel that are being run on unleaded now. This is very true of high rpm/power car and truck engines. The little ol' Cub engine doesn't really require them, but some recommend that hardened seats be installed at least on the exhaust valves. I'm sure others will chime in with their opinions. If you want to never worry about it again (and can bear the expense), go ahead and have hardened seats installed. The next issue will be finding someone to do the work as many engine/machine shops don't have seat grinding tools that are small enough for the Cub valves.

Eugene
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Re: Which valve set?

Postby Eugene » Mon May 08, 2017 9:50 am

Urbish wrote:The next issue will be finding someone to do the work as many engine/machine shops don't have seat grinding tools that are small enough for the Cub valves.
Small engine shops will have the equipment to take care of any issues with the cylinder bore and valve seats.
I have an excuse. CRS.


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