Removing valve guides

[BruceH]

So what's required to regrind the valves? Is it as simple as chucking one up in a drill with a good chuck, using some valve grinding compound or similar abrasive, and pulling it against the seat? Or would that be the shade tree/redneck way to do it?

 

[05stroker]

So what's required to regrind the valves? Is it as simple as chucking one up in a drill with a good chuck, using some valve grinding compound or similar abrasive, and pulling it against the seat? Or would that be the shade tree/redneck way to do it?

Not sure, I will leave that to the machine shop I use.

 

[01yellerCobra]

So what's required to regrind the valves? Is it as simple as chucking one up in a drill with a good chuck, using some valve grinding compound or similar abrasive, and pulling it against the seat? Or would that be the shade tree/redneck way to do it?

I saw them do that on Horsepower TV once. Has to be easier then using the suction cups.

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[05stroker]

I saw them do that on Horsepower TV once. Has to be easier then using the suction cups.

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Are you sure they were not "tapping" the valves?

 

[TexasBlownV8]

We've always ground by hand, using a suction cup and a valve grind "crank" tool..has a handle on the side you turn and it oscillates the valve back and forth in the seat. Grind until you see 6-8 or so tiny grooves cut into the valve. Again, this is old-school mechanic style.

 

[tmcolegr]

if you're going to grind the seats I suggest using a machine similar to this or equivalent

Hand lapping afterwards is unnecessary. Only reason to perform that task is to confirm seat to valve width and location.

 

[PNR Welding]

The proper way is to grind either a 3 angle or 5 angle, and then lap them to the seat. Amy decent machine shop would charge 30$ - 40$ a head.
If the cylinder holds 20+ vacuum, then it will be OK and not needed.

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[RED09GT]

The proper way is to grind either a 3 angle or 5 angle, and then lap them to the seat.

This.

Edit: I'm a bit behind the times but I still like lapping the valves rather than just trusting the cutter. It seems that with the right gear lapping is not necessary according to some builders.



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[01yellerCobra]

Are you sure they were not "tapping" the valves?

I don't think so. But it's been awhile since I've seen the episode and I don't have much experience doing head work.

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