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Message: [QUOTE="SFO, post: 330370, member: 21864"] [b]one more thing[/b] Jescombe, Try talking to the person who built your head. They need to be advised that they set it up at the end of the shim range. I swear I get more education from my customers than I give. Did he tell you were it was? If the stem protrusion is at the end of the shim range was the spring installed height altered? If the installed height wasn’t corrected you could also be looking at too light a seat pressure. You can also butt grind the valves to correct your stem protrusion but then you will have to be very careful about the bucket/retainer clearance, I have seen people set up heads were the bucket pushes on the retainer instead of the shim. CATASTROPHIC! Keep us posted, Bill These guys also appear to be squared away but I have no experience with them... [url]http://www.cylinderheadshop.co.uk/services.html[/url] [/QUOTE]