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Old 10-06-2012, 10:48 PM   #9
Bill Harris
Confirmed Curmudgeon
 
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Joined: Sep 2008
Location: backwoods Alabama
Oddometer: 5,998
I went through the same valve-seat paranoia with my /5. Unleaded gasoline was phased out in the late 1970's and the pre-Internet discussions in BMW Club newsletters was how unleaded fuel was causing severe valve recession. So around 1983 I went and did a "unleaded valve seat" replacement. Turned out that my /5 was fine, it was changes in the valves that caused the problems in the "new" early 1980 BMWs.

I'll admit that I try to use ethanol-free gas when I can, simply because I had an old trank liner (Kreem) that is not alcohol-proof. I plan to remove and replace that tank liner when I get my tank painted next year.

Keep an eye on things, you should be good. And if something goes amiss, repair it.
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