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Ford 9N, 2N & 8N Discussion Forum
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Old guy needs help in arguement with 20 somethings

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Rayiowa

08-07-2007 14:33:27




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I commented today with a bunch of young engineers that I remembered a car engine back in the sixties with valve stems that were cooled with sulfur in the stem. The sulfur would liquify in the hot area and then cool as the hot liquid "melted" the solid on the other end.

Did I make this up? I googled for 8 pages of articles with no success finding any reference to anything close to this. Seems like Hot Rod magazine had an article on the concept. Or,, maybe I should stop eating with these young whippersnappers!

Ray Iowa

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grfok

08-10-2007 14:50:38




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
Ford 427 HP engines used sodium filled exhaust valves



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Paul in MN

08-08-2007 22:05:47




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
The IH truck engines in the v-8s (304, 345, 392) had sodium filled exhaust valves. Maybe more of their engines were also fitted with sodium valves, but I am not sure. This series of engines was used in the IH PUs, Travelalls, and LoadStars. They also did not have timing chains and sprockets, but like the N, had gear on gear driving the cam shaft.

Paul in MN



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john smallwood

08-08-2007 08:47:07




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
Yes, and 56 sparks plugs. I should know, I changed a bunch . On a c-124. And afew on a b-29 B- 50. Sure do miss those days. Have agood day an may God bless, like he has for me. john



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ZANE

08-08-2007 04:21:35




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
The exhaust valves on the great WW2 era aircraft engines had sodium in them. Aided in heat transfer to the base metal of the cylinder head.

When one fails it makes a mess!!!!!.

I had the job of fixing such a mess.

Do you know how many crankshaft rod journals are on a 28 cylinder radial engine????? ??

Four.

Zane



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Jason Simmerman

08-07-2007 18:53:56




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
Yeah, I think you meant sodium. Sodium valves are used today in engines that are more performance oriented IE the new Corvette LSx motors and so on. Most of the regular car/truck engines are just solid stem valves.



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BCnT

08-07-2007 15:57:41




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
you're half rite...it does start with S
sodium

smack em wif somethin heavy for arguin with their elders ;)



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Dean

08-07-2007 15:05:13




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
Ray:

I agree with Den and Greg. Sodium cooled exhaust valves were not uncommon in HD applications but I have not heard of using sulfer.

Maybe it's time for some new lunch company.

Dean



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Den N Ms

08-07-2007 14:51:39




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
In certain heavy-duty and most air-cooled engines, the exhaust valves are sodium filled. During engine operation, the sodium inside the hollow valve melts. When the valve opens, the sodium splashes down into the valve head and collects heat. Then, when the valve closes, the sodium splashes up into the valve stem. Heat transfers out of the sodium, into the stem, valve guide, andengine coolant. In this way, the valve is cooled. Sodium-filled valves are light and allow high engine rpm for prolonged periods. In vehicles that use unleaded fuel, a stellite valve is preferred. A stellite valve has a special hard metal coating on its face. Lead additives in gasoline, other than increasing octane, act as a lubricant. The lead coats the valve face and seat to reduce wear. With unleaded fuel, the wear of the valve seat and valve face is accelerated. To prevent this and prolong valve service life, use a stellite valve.

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Greg_Ky

08-07-2007 14:37:50




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 Re: Old guy needs help in arguement with 20 somethings in reply to Rayiowa, 08-07-2007 14:33:27  
Ford truck engines had sodium filled valves back in the day.



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GAJIM

08-07-2007 20:25:24




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 Re: Old guy needs help in arguement with 20 somethings in reply to Greg_Ky, 08-07-2007 14:37:50  
I also believe that the 440 Dodge truck engines has sodium filled valves. GA Jim



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