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JD A valve seat

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Menno from Holl

09-19-2002 07:36:04




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The seat off my valve's are with one angle.
There is a difference in input and outlet. I read in the manual this is correct.

But noweday's we make each seat with to angle's. Is this also for the JD A nessecary.

thanks from Holland




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BushogPapa

09-20-2002 06:59:39




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 Re: JD A valve seat in reply to Menno from Holland, 09-19-2002 07:36:04  
If you are doing the job yourself, or are going to want max power..Back cut the stem-side of the valve to the edge of the seal area---with the flattest angle you can use.... This helps low-lift air flow, and will give effectively More valve opening... Lightens the valves a little, too.. You WILL see a difference in power, too...!!



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SEAMO

09-19-2002 07:54:41




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 Re: JD A valve seat in reply to Menno from Holland, 09-19-2002 07:36:04  
The correct way to grind seats is with 3 angles.Example would be If the correct angle for the valve or seat is 45degree you would narrow the seat from the top side with a 30 degree and narrow the seat from the bottom with a 60 degree to get the seat margin to come in the right place on the face of the valve. Lap the valve to find the seating. Earl



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