NOPE IT ISNT , IF THE LIFTERS ARE ALL READY CLOGGED UP WITH OILY SLUDGE , REMOVING THE OIL REGULATORS MAY NOT DO ANYTHING AT ALL , BUT IT MAY CORRECT IT, IT IS DEFINATELY WORTH A TRY, WHEN YOU GET THE UPPER PLENUM CHAMBER OFF YOU SHOULD BE ABLE TO MANEUVER THE VLV CVR ENOUGH TO REMOVE IT . JERRY