Quote:
Originally Posted by plymouthcranbrook
Plymouths and other Mopars have always had hardened valve seats. This is one area that wears without the protection of lead. The only additive I use in my old Plymouths is Zinc and even that may not be needed but sinces it is realitively cheap, I use it as insurance. I belong to a Plymouth Owners Club and no one I know adds Lead Substitute to their cars. And no one has lost any valve performace either.
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Don't know about that Plymouth Owners Club you belong to, but I will say this. Don't have a clue as to what you guys are smoking but you are nuttier than a fruit cake, if you think ALL Mopars have hardened valve seats. Nothing from 1970 and back, has them, as unleaded fuel wasn't even around yet, so NONE of them needed hardened valve seats!
I know several people in Mopar clubs from around this area, and not a single one of them will agree with you. The zinc additive you use is doing absolutley nothing, as far as anyone I asked about it.
Sure you can drive a car without hardened valve seats, or without adding a lead substitute, for up to around 30,000 miles, as ANY search will tell you, but after that, it WILL BE time to start looking at getting a valve job done.
Thanks for your reply, but I am totally disregarding that one!!