Engine

Essex 6 plugs oiling  badly would the cause of  that be the gap in valves i have changed the spark plug from ngk -- Bosch your advice would be appreciated motor would not done 1000 mps since overhaul thanks

Comments

  • Do a compression test of each cylinder. 
  • The valve clearance  will have no effect on plug oiling.    the only thing causing this is too much oil getting past the rings.   You may need to  use a non-detergent, non friction-modified oil until the rings bed in.  
  • What is the actual spark plug numbers you were using???
    Both for the NGK  and the Bosch??
    Plugs that are to cold will foul easily.
    There is a likely hood that a hotter range may help