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RE: No lead

To: James Nazarian Jr <James.Nazarian@Colorado.EDU>
Subject: RE: No lead
From: "Dodd, Kelvin" <doddk@mossmotors.com>
Date: Tue, 22 Feb 2000 18:14:10 -0800
James:

        If the valves are kept adjusted correctly so that the seats arn't
hammered to death the original as cast seats hold up for a fair time.  When
the factory went to unleaded, the seat areas were hardened slightly by heat
treating, but inserts were not used.

        From my experience with unleaded fuel, I was getting about 20,000
miles out of the original seats following a valve and seat grind.  Then the
seats were so recessed that the valves would not stay adjusted.  At that
point the heads were replaced with less worn ones.  I now have a pair of 18V
heads with exhaust seats completely worn out.  Installing hardened seats is
a simple way to rejuvinate the head once it is worn out.  

        Keep in mind that valve and seat wear and failure is a combination
of factors.  Valve train geometry, spring rate, fuel mixture, cooling,
maintenance  etc.  A little extra money spent at rebuild time tends to give
you more miles of carefree driving and a wider margin for error.



Kelvin.

> -----Original Message-----
> From: James Nazarian Jr [mailto:James.Nazarian@Colorado.EDU]
> Sent: Tuesday, February 22, 2000 5:57 PM
> To: Dodd, Kelvin
> Cc: James Nazarian Jr; mgs@autox.team.net
> Subject: RE: No lead
> 
> 
> So what you are saying is that I probably should have converted my '71
> when I put it on the road 5 years ago?  I blew the head 
> gasket racing last
> fall and replaced that and cleaned head, no holes and no minions but I
> think they are being eaten by the rust worms.
> 
> James Nazarian
> '71 B roadster
> '71 BGT rust free and burnt orange
> '74 BGT going by-by soon
> '63 Buick 215 
> 
> On Tue, 22 Feb 2000, Dodd, Kelvin wrote:
> 
> > James:
> > 
> > The first indication of a problem is that the valves need 
> to be adjusted
> > more often.  This is fun the first time or two.  When your 
> lady complains
> > that she can't hear you over the clatter of the engine then 
> beans you with a
> > handbag you realize that the world is no longer a friendly 
> place.  Shortly
> > thereafter holes appear in the edges of the exhaust valves, 
> Cthulu's minions
> > crawl from the dark nether regions of the earth and the 
> echo's of screams
> > replace the flatulant gasps of fumes pushed past worn out 
> valve seats.
> > 
> > In three words.   Aggravated Valve Recession.
> > 
> > 
> > Kelvin.
> > 
> > > 
> > > What happens if nothing is done to convert?  Do you burn 
> oil or burn
> > > valves or what? Or will the entire universe collapse?
> > > 
> > > James Nazarian
> > > '71 B roadster
> > > '71 BGT rust free and burnt orange
> > > '74 BGT going by-by soon
> > > '63 Buick 215 
> > > 
> > > On Sun, 20 Feb 2000, Charley & Peggy Robinson wrote:
> > > 
> > > > Hi Carl,
> > > > 
> > > >   Haven't been on in a while, so just saw yer post.  Best 
> > > intelligence
> > > > I've received so far is that you need to have hardened 
> valve seats
> > > > installed in AT LEAST the exhaust side of your head.  
> You can run
> > > > stainless or stellite exhaust valves.  I'm running 
> > > stellites; lots of
> > > > cars running stainless.
> > > > 
> > > >   CR
> > > > 
> > > 
> > 
> 

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