RE: IML: Lead Additive

["Kristian Oyen" <kandkoyen@xxxxxxxxxxxx>]

I would have thought that the hardened valve-seats came earlier than '73-- I
may be wrong, but wasn't there a change in fuel-requirements some where in
the middle of 1969 production? I'm sure someone here will know. I thought
the unleaded fuel was needed across the board in about 1970.
My '63 and '67 Imps get a diet of a few gallons of leaded premium- sold in
several places here as racing-gas- and then the rest of the tank gets topped
off with 92 or 93 unleaded premium; they both run well with no pinging. I
always carry either five or ten gallons of the racing-fuel in cans when I
travel and feed it to the tank as needed.
And I add my thanks, admiration, and appreciation to those who have fought,
were injured, or died to preserve our freedoms.
  Kristian Oyen
  

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Tim Durrer
Sent: Friday, November 10, 2006 4:22 PM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: Lead Additive

The owners manual for my 73 states you may use both leaded or unleaded. The
production date on the vehicle is 11/72. Not sure of the casting numbers or
if this version of 440 was used across the board in other Mopars.

Tim

--- sosmi@xxxxxxxxxxx wrote:

> According to DAS BOOK, hardened valve seats, came out around 74, the 
> casting #3769902 the 73, 400-440 motor home castings 3751213, could 
> also have hardened seats.The castings, 3769902,3769975,4006452, all 
> have hardened seats.Ya'll have a nice day, Dave.
> 
> -------------- Original message --------------
> From: aeyn <mr85000@xxxxxxxxx>
> 
> > Regarding this subject. 
> > Does any one recall when Chrysler started to put
> the hardened
> > valce seats in the engines. I remember something
> about they
> > started gradually putting in the hardened seats
> PRIOR to 1975 in
> > differnet model lines. 
> > 
> > ƹn. 
> > 
> > 
> > --- Dan wrote: 
> > 
> > > There were a number of posts recently about lead
> additives but
> > > I don't
> > > remember anything about "amounts per gallon". I
> followed the
> > > directions on
> > > the product I bought of 1/2 ounce per 5 gallons.
> Considering a
> > > half ounce is
> > > such a small amount, does this sound right?
> Also, can someomne
> > > tell me what
> > > might happen toa 440 or 413 if it is run with
> premium unleaded
> > > gas and no
> > > lead additive? If it is harmful, would it be
> immediate or
> > > gradual over time? 
> > > 
> > > I'd also like to join in with thanks to those of
> you who fought
> > > for our
> > > freedom. The character and courage of men and
> women like you is
> > > responsible
> > > for the freedoms we all enjoy today. 
> > > 
> > > Thanks You! 
> > > 
> > > Dan Collins
> > > 67 Crown Coupe
> > > 
> > > 
> > > 
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