Burt Bouwkamp Hi Burt - Induction hardened exhaust valve seats went into production on the 1972 six-cylinder RG engines and spread to all engines the following year so the 383 LB V8 in your 1968 Charger definitely has the prior non-hardened seats. The recommendation of the engine lab for owners of older cars at the time of the changeover was that low speed driving would be OK with no-lead fuel but for high speed expressway driving a lead (or lead equivalent) additive should be added with each fillup. You might give the engine a compression check every now and then to see if everything is OK. Hope this helps - Bill----- Original Message ----- From: "aeyn" <mr85000@xxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Friday, November 10, 2006 3:09 PM Subject: Re: IML: Lead Additive
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. Æyn. --- Dan <sunup@xxxxxxxxxxxxx> 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 ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm
----------------- http://www.imperialclub.com -----------------This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the
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