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+--- Thread: Valve clearance. (/showthread.php?tid=2584)
Valve clearance. - Robert Foreman - 30-03-2019
How much clearance does a valve need at full lift in the combustion chamber ?
For the best flow should there be a good clearance above the valve or not ?
RE: Valve clearance. - Alan - 30-03-2019
Ideally there should be space above the valve, but in reality there is probably more benefit in maintaining a good compression ratio. I usually fit the head without a gasket. If the valves don’t hit the head, it should be ok with the gasket fitted.
RE: Valve clearance. - Chris KC - 31-03-2019
For optimal flow you just want it as far open as possible. I agree with Alan, as long as it's not physically touching the head you should be OK.