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Motor Valves, What are they good for?

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James Veitch11/04/2010 03:54:42
16 forum posts
I have a clapped out Briggs & Stratton motor.  I've torn it apart to see what bits and pieces might be useful.
I'm sitting here looking at the shiny, bright valves wondering what I might do with them.
Most importantly is the steel machinable or am I asking for trouble?
Are there other good bits on the motor I should be looking to salvage?
 
Thanks in advance,
Jim Veitch
JasonB11/04/2010 07:29:18
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25215 forum posts
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Valve stems can be used to make valves for model IC engines.
 
Jason
Windy11/04/2010 09:56:34
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910 forum posts
197 photos
Hi James, I have used numerous car and motorcycle exhaust valves on my flash steam engines.
Some have been made of 21/4n and nimonic steel plus others that I do not no the specification of.
Tough but can be machined with sharp HSS tools.
If the valve material is going to be used in a high performance engine make sure the valve you use does not have a welded on head as they sometimes can break off.

 

Windy.

Edited By Windy on 11/04/2010 09:57:24

Ian S C11/04/2010 13:33:57
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7468 forum posts
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I'v got some that I have converted into punches. Also a pair from a B&S modified for a home brewed open crank petrol motor.Ian S C
Stub Mandrel18/04/2010 19:37:44
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4318 forum posts
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I have a few from an Astra that snapped its cambelt. It turned out one of the ones I hadn't expected to replace was slightly bent, and I couldn't get to teh shop, so I took a skim off it with an ordinary HSS tool. It lasted a couple of years until the big ends went (at about 250K!)
 
Neil
Stub Mandrel18/04/2010 19:37:52
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4318 forum posts
291 photos
1 articles
I have a few from an Astra that snapped its cambelt. It turned out one of the ones I hadn't expected to replace was slightly bent, and I couldn't get to teh shop, so I took a skim off it with an ordinary HSS tool. It lasted a couple of years until the big ends went (at about 250K!)
 
Neil
Stub Mandrel18/04/2010 19:47:03
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4318 forum posts
291 photos
1 articles
I have a few from an Astra that snapped its cambelt. It turned out one of the ones I hadn't expected to replace was slightly bent, and I couldn't get to teh shop, so I took a skim off it with an ordinary HSS tool. It lasted a couple of years until the big ends went (at about 250K!)
 
Neil
Stub Mandrel18/04/2010 19:47:08
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4318 forum posts
291 photos
1 articles
I have a few from an Astra that snapped its cambelt. It turned out one of the ones I hadn't expected to replace was slightly bent, and I couldn't get to teh shop, so I took a skim off it with an ordinary HSS tool. It lasted a couple of years until the big ends went (at about 250K!)
 
Neil
Stub Mandrel18/04/2010 20:49:54
avatar
4318 forum posts
291 photos
1 articles
I have a few from an Astra that snapped its cambelt. It turned out one of the ones I hadn't expected to replace was slightly bent, and I couldn't get to teh shop, so I took a skim off it with an ordinary HSS tool. It lasted a couple of years until the big ends went (at about 250K!)
 
Neil

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