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Valve seat grinding


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  #1  
Old 10-12-2009, 08:08 PM
Bob Kurtz Bob Kurtz is offline
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Default Valve seat grinding

Does anyone know of a good method or tool for grinding valve seats on an old Briggs WMI engine the seats are pitted ,just to much for valve lapping.
Thanks , Bob
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Old 10-12-2009, 08:14 PM
Jim Tremble Jim Tremble is offline
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Default Re: valve seat grinding

Bob

Go to your local Briggs dealer and buy a valve seat cutter. Easy to use.

Jim
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  #3  
Old 10-12-2009, 09:05 PM
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Dennis Wyatt Dennis Wyatt is offline
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Default Re: valve seat grinding

These are a little pricy but they work great! good luck!! http://www.flandersco.com/Images/PDF...%20Cutters.pdf

Dennis
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Old 10-12-2009, 09:37 PM
Bob Kurtz Bob Kurtz is offline
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Default Re: valve seat grinding

Thanks for the information! i'll have to price out the tungston cutters ,and I'll check the briggs dealer tomorrow.
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Old 10-12-2009, 10:02 PM
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Dennis Wyatt Dennis Wyatt is offline
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Default Re: valve seat grinding

let us know how much the briggs cutters are. I may have to get one of those
Dennis
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  #6  
Old 10-13-2009, 06:43 AM
John Schwiebert John Schwiebert is offline
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Default Re: valve seat grinding

How much does the local automotive machine shop charge to do both seats?
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Old 10-13-2009, 09:36 AM
Jerry Jerry is offline
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Default Re: valve seat grinding

Yo can also check with Neway They have some great sets
www.newaymfg.com
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Old 10-13-2009, 05:22 PM
Dick DeBuse Dick DeBuse is offline
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Default Re: valve seat grinding

Neway sells a small engine set which will do most older Briggs as well as other engines. They provide OEM sets to many manufacturers. The valve refacer is very handy.
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Old 10-13-2009, 09:06 PM
Jonathan Widelo Jonathan Widelo is offline
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Default Re: valve seat grinding

The Neway cutters work great, and the stones are replaceable. The valve seats in my Briggs model U were so bad, I thought I would have to replace them, but after a little work they cleaned up well. The only thing I had to have done was have the valve stems trimmed, which can either be done on a valve resurfacing machine with a stem attachment or at a local machine shop. I am missing the stem attachment for my machine, so I had my valves cut done by a local machinist.
A set of Neway cutters is a great investment, but they will run you about $200+.

~ Jonathan
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Old 10-13-2009, 10:05 PM
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Junkologist Junkologist is offline
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Default Re: valve seat grinding

I got my Neway set at a local auction for $50. I love it.
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Old 10-14-2009, 09:30 AM
K D Redd K D Redd is offline
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Default Re: valve seat grinding

Neway sets are expensive. Their basic valve seat cutter set now lists for $494.93 This set cuts 31 and 46 degree seat angles. If you want the set that cuts 15, 31, 46 ,and 60 degree seats it will set you back $734.17 These prices are from the Stens 2009 Master Catalog. I was lucky enough to have my Brothers Father-in-Law to give me a set he had gotten at an auction. This set is old. I would say the 60's. It has the price written inside the box. I think it was about 50 bucks then. I have told my Nephew that if he ever wants his Grandfather tool he is welcome to it.

Kent
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Old 10-14-2009, 07:10 PM
SMertz SMertz is offline
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Default Re: Valve seat grinding

You can sometimes find old valve seat grinders with stones at auctions. These will also work depending on the stone and pilot sizes, so long as it includes the facing tool for the stones. Stones will also easily do large engines the small neway/briggs set will not.

I happen to have both systems (bought the neway new from briggs, then found a blue-point/snapon stone set at an auction about 2 years later), so I use the neway for the smaller stuff, and the stones for larger. The carbide cutter set (neway) does a more consistant job and leaves a better, smoother finish.

Just my 0.02.
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Old 10-14-2009, 07:33 PM
Bob Krummel Bob Krummel is offline
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Default Re: Valve seat grinding

Racing go kart shops sell a 31 and 46 degree cutter with a 1/4 inch pilot Neway kit for about $150 or there abouts. Check eBay. You could maybe make your own pilot shafts to match the valve stem diameters of the older briggs. I got a used kit on eBay with several different pilot diameters for less than $100.
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Old 10-14-2009, 07:54 PM
John Schwiebert John Schwiebert is offline
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Default Re: Valve seat grinding

In reply to smertz when I worked at the machine shop training school we had several different valve grinders that used stones plus the Newway. If your stone finish is not that good compared to the carbide are you doing stellite or other alloy type valves? You may have the wrong sone. Where I sub at school they use the New-Way for small engines but stones for everything else. Remember soft stones are used when grinding hard seats.
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