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Re: 3 angle valve grinding??
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Posted by Lil-Farmer on November 12, 2004 at 14:49:53 from (205.246.142.55):
In Reply to: Re: 3 angle valve grinding?? posted by Allan in NE on November 12, 2004 at 14:27:44:
I agree 100% with Allen. If I took a set of heads to a shop to have the valves ground and they weren't at least three angle with the seat contact area being 1/16 th to 3/32 nds wide, I wouldn't pay for the job. I have been grinding three angle seats for 50 years, ain't new technolgy. Doesn't require anything but a stone that is more angle than the seat and one that is less angle than the seat. I. E. A 45 degree seat would require a 60 degree stone for the outside and a 30 degree stone for the inside. Use a tube of lipstick (don't tell the wife) and make marks across the face of the valve and use your suction cup to spin the valve in the seat to determine where the contact patch is; move it up and down and control the width by grinding outside or inside. Once it is where you want and the width you want, use some lapping compound to finish the job. Your valve job will last for yearas and years if done properly.
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