• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Tips
Tips

Unleaded heads?

Share this page

W

Wade Keene

Member
Offline
It was '75 or'76. Machine shops put in hardened unleaded valve seats as a matter of course anymore, and I would they have for years. If a '74 has had headwork in the past X years since leaded became unavailable, I wouldn't worry about it. Even if it hasn't I still wouldn't worry about it, the extra wear is a slow occurence. As I understand it, valve seat recession is the problem and the cast iron that slowly recedes is the area that gets milled out to put in a new seat anyway.
 
I should know this but I'm drawing a blank... after what year did the stock MGBs come with hardened valve seats - or otherwise unleaded-compatable heads for the NA market?

I'm considering getting a 74 (chrome) GT for a daily driver but can't remember if they were unleaded-friendly!

---Scott
 
Back
Top