Hardened Valve Seats, but why?

[Mark Pitts]

Grud!... wasn't life easy with lead???

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From:  Dirk Wright[SMTP:wright at uspto.gov]
Sent:  Thursday, September 19, 1996 10:03 AM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  Re: Hardened Valve Seats

On Thu, 19 Sep 1996, Stephen Lamb wrote:

> >Wie Gehts?  Just wanted to let you know I hadn't forgotten about the
> >seat
> >material.  Checked the SAE books we have--specs for valves, but not
> >seats.  Checked the General Motors Materials books, but no mention I
> 
> One material used for 'hardened' valve seats is Stellite, which is a Cobalt
> based alloy. Also used a facing material on the valve itself.  I can get
> specs if you want.

Stellite valves are also available for Porsches and maybe some other cars.

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Dirk Wright 					            wright at uspto.gov
"I speak for myself and not my employer."               1974 Porsche 914 2.0
"A real hifi glows in the dark and has horns."            1965 Goodman House
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