RE: IML: Unleaded or Leaded gas

["Donn Reese" <DReese@xxxxxxxx>]

I know when I had my '62 I researched this in the mid 1980's because of local fuel law changes and Chrysler was using hardened seats at that point.  Never had an issue.

 

Hopefully the more hardcore motorheads will have a more definite answer.

 

Donn Reese

-saving for a '60 or '62 LeBaron

 

 

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx]On Behalf Of Frederick Joslin
Sent: Thursday, March 09, 2006 7:34 AM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: Unleaded or Leaded gas

It is the seats in the heads which were hardened. I don't know if they changed the valves themselves. I know that the 452 casting B and RB heads from 1976-1978 had hardened valve seats. Not sure about heads before that.  

----- Original Message -----
From: clgilleland@xxxxxxxxxxxx
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: IML: Unleaded or Leaded gas
Date: Wed, 8 Mar 2006 00:36:57 -0600

Hi, I was wondering When did Chrysler start putting hardened valves in engines so they could br ran on unleaded? I have a 74 Imperial with a build date December of 1973.

Fred Joslin