I have a Mazda fe2.0 engine which I bought recently and the head leaked I pulled the head and cleaned and cleaned valves and installed new guide seals I cleaned valves also I installed new head gskt and when I went to adjust valves I couldn't get enough clearance on one exhaust valve my manual shows clearance is.013 for all valves I didn't measure the valve length wondering if anyone has ever run into this problem I checked the rocker arm and it looks fine any input would be helpful