After everything was done and assembled it was time to do a leak test by pouring gasoline on the valves with the cylinder head upside down. To my bewilderment the gasoline went right down past the valve edges in no time. I leaned over to take make a visual inspection and sure enough there was about 1mm gap between the valve head and the seat. I could literally see light coming through the gap from the intake/exhaust ports.
Now I know that it couldn't have been my mistake, for I lapped the valves with a lapping stick by hand.
This sure seems a mystery to me. What could have happened here?
Is it possible the previous owner to have done a lapping or resurfacing which could account for this?
have the same problem?
Monday, February 11th, 2019 AT 1:14 AM