[SEL] Spark Plug Stuff

[Jim and Diane]

Teflon is good for about 500 deg F. max.  Anything past that is going to 
have a short lifespan. Sounds to me that it would be a very marginal choice.

Jim

Jim and Diane Kirkes
Hemet, CA , U.S.A.
jd.kirkes at verizon.net
----- Original Message ----- 
From: "John Culp" <johnculp at chartertn.net>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Wednesday, April 19, 2006 8:53 PM
Subject: Re: [SEL] Spark Plug Stuff


Teflon tubing was mentioned 7-8 years ago on this list as a workable
substitute for mica in ignitors. Don't see why that couldn't be made to
work in a spark plug.

John

On Apr 19, 2006, at 10:28 PM, John Hall wrote:

> If anyone cares to talk engine stuff, I got one for you. I need to
> rebuild some rather expensive sparkplugs to have for spares. They are
> built originally using Mica tubes and washers for insulators. Anybody
> come up with a more modern material you prefer for rebuilding
> plugs/igniters? I found some machinable ceramic but it ain't cheap!!
> My biggest concern when choosing an alternative material is that I
> don't know how much heat I need to withstand. Anybody have any idea
> how hot it gets inside the combustion chamber of a "working" engine?


John Culp
Bristol, Tennessee, USA

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