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I have a 1982 GL 240 (B21F) that I am likewise considering replacing the head on. Apparently, the exhaust valve on cylinder one (closest to the front) has burned and is leaking. All other cylinders test at 135-140 PSI, #1 is 60. It burns no oil to speak of and run well running down the highway. Car has 220,000 miles on it. I found the problem when I had checked the clearance couple months back because of a missing problem at idle, the exhaust gap on number 1 was 0.003. I reshimmed it but I guess too late. All the exhaust valves were tight,0.003, 0.008, 0.006, 0.011 for 1-4.
My question is similiar in that can I get a head with the cam already on so I don't have to mess with that (just put the whole thing as a unit checking the valve clearances). Likewise, does in intake manifold have to come out or can I unbolt it and pull it aside?
What years of heads will fit, just the B21F heads up to 1982?
Will the turbo head fit?
Another question, will this problem go away with the valve readjusted? Will the seat or valve wear and produce a better fit? I don't have an experiance with burnt valves.
Thanks, Jim
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