The Ford Barn

oldford2 · 04-29-2012, 10:52 AM

Some of the power valve leaking problems are caused by the gasket not seating down flat due to the large radius at the bottom of the threaded stem. I saw a post sometime ago (I think by CharlieNY) how he machines a flat surface for the gasket to seat on. I don't have a metal lathe so made a wooden "nest" on my wood lathe. The PV body metal is soft so the flat surface can be cut with a wood working parting tool. John

jack orchard · 04-29-2012, 11:09 AM

does anyone know an easy way to adapt a power valve so that it could be chucked in a drill press and the radius be filed off? just askin....jack

ken ct · 04-29-2012, 11:37 AM

Quote:

Originally Posted by jack orchard

does anyone know an easy way to adapt a power valve so that it could be chucked in a drill press and the radius be filed off? just askin....jack

If you use the correct size gasket this operation is unnecsssory as they dont ride up on the radius which is what happens when the id is too small,get the correct size gaskets.OMO. ken ct.

Or you can buy PV's WITHOUT this radius on them.

19Fordy · 04-29-2012, 12:17 PM

One slip of the parting tool and it's all over. I suppose you could make a round rod with 1/2-27 fine internal threads to "chuck up" the PV in a drill press.

Strick · 04-29-2012, 03:38 PM

so recently I overheard a couple of older guys talking about soldering the power valves shut? anyone ever heard of this? didn't get a chance to ask them why and for what reason?

ken ct · 04-29-2012, 04:35 PM

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Quote:

Originally Posted by Strick

so recently I overheard a couple of older guys talking about soldering the power valves shut? anyone ever heard of this? didn't get a chance to ask them why and for what reason?

Yea its a cheap way of making a dummy power valve or block off the spark valve opening with one. ken ct.

G.M. · 04-29-2012, 04:39 PM

Don't use such a hard gasket and it will conform to the curve. I never had to machine one. G.M.

Charlie ny · 04-29-2012, 05:44 PM

Old Ford,
I'm fortunate in having a nice Austrian lathe with a range of collets.
I gingerly grasp the PV by the threads in a .500 dia collet and machine the gasket face
square with the threads. This requires the use of a 'parting' tool, believe me if I can
do it anybody can do it. I make my own nylon gaskets from medium durometer
nylon .As Ken and George mention...the gasket is critical.
Charlie ny

04-29-2012, 10:52 AM	#1
oldford2 Senior Member Join Date: May 2010 Location: pittsfield, MA Posts: 2,086	power valve leaks Some of the power valve leaking problems are caused by the gasket not seating down flat due to the large radius at the bottom of the threaded stem. I saw a post sometime ago (I think by CharlieNY) how he machines a flat surface for the gasket to seat on. I don't have a metal lathe so made a wooden "nest" on my wood lathe. The PV body metal is soft so the flat surface can be cut with a wood working parting tool. John

04-29-2012, 11:09 AM	#2
jack orchard Senior Member Join Date: Jun 2011 Location: summerfield florida Posts: 383	Re: power valve leaks does anyone know an easy way to adapt a power valve so that it could be chucked in a drill press and the radius be filed off? just askin....jack __________________ Proud FNG We fixem cars. Heap Good!

04-29-2012, 12:17 PM	#4
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,963	Re: power valve leaks One slip of the parting tool and it's all over. I suppose you could make a round rod with 1/2-27 fine internal threads to "chuck up" the PV in a drill press.

04-29-2012, 03:38 PM	#5
Strick Senior Member Join Date: May 2010 Location: Marietta, GA Posts: 1,103	Re: power valve leaks so recently I overheard a couple of older guys talking about soldering the power valves shut? anyone ever heard of this? didn't get a chance to ask them why and for what reason? __________________ 1940 Mercury Looking for DENVER heads - 81AS - 99AS - 19AS

04-29-2012, 04:39 PM	#7
G.M. Senior Member Join Date: May 2010 Location: Florida and Penna. Posts: 4,471	Re: power valve leaks Don't use such a hard gasket and it will conform to the curve. I never had to machine one. G.M. __________________ www.fordcollector.com

04-29-2012, 05:44 PM	#8
Charlie ny BANNED Join Date: May 2010 Posts: 3,019	Re: power valve leaks Old Ford, I'm fortunate in having a nice Austrian lathe with a range of collets. I gingerly grasp the PV by the threads in a .500 dia collet and machine the gasket face square with the threads. This requires the use of a 'parting' tool, believe me if I can do it anybody can do it. I make my own nylon gaskets from medium durometer nylon .As Ken and George mention...the gasket is critical. Charlie ny