Quote:
Originally Posted by MagicRat
Cork, if you disagree with cranbrook, do so, but don't call him nutty. Thats not in keeping with the friendly spirit of cooperation we have around here at AF.
I have never heard of Plymouths always having hardened valve seats before 1971. They might, but just in case they don't, use the lead substitute.
I will say that the Plymouth Cranbrook had the old Chrysler flathead six, which had lower compression, lower valve spring rates and lower revs than an OHV V8. I am sure a flathead six, driven occasionally will last many years without valve trouble. But an OHV 361 has higher reves and stiffer valve springs and subsequent increased stress on the valve seats. So, use the additive imo.
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Sorry about the nuttier than a fruit cake comment and DID NOT mean it in any way as an insult, but more of a totally astonished comment! I have NEVER heard anyone say anything even remotely close to that line of bull though and I would suggest that plymouthcranbrook check his car and the facts, before driving his vehicle much more and relying on the other members of that club he belongs to.
I am now considering this topic closed and will not reply to it again. Besides, the info I've received from the other 2 Mopar forums I've joined is much better, with much faster replies and definitely more accurate replies!! In fact, I had forgotten I had even joined this forum until I received the automatic e-mail for having subscribed to this topic. I mean, crap, it took almost 3 months to get the first reply!! Sheesh!!