On my 223, the valves need to be adjusted much more frequently than the 12k mile recommended interval. I am having to adjust them after a few thousand miles and finding that they are tight, not loose.
The only explanation I can come up with for this is valve recession into the head. The head is original so the valve seats are not hardened. I have never had issues running unleaded gas in other engines of this vintage, so this is a new scenario to me. Is lead additive/substitute an effective or necessary solution?
The only explanation I can come up with for this is valve recession into the head. The head is original so the valve seats are not hardened. I have never had issues running unleaded gas in other engines of this vintage, so this is a new scenario to me. Is lead additive/substitute an effective or necessary solution?