Re: IML: Lead Additive

[Tim Durrer <tdkd99@xxxxxxxxx>]

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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