OMC Stern Drives And Motors 1964-1986 Repair Manual., Page 48Get this manual
GMC IN-LINE Inspect the cylinder head cracks in the exhaust ports, combustion chambers, the chamberIns the valves burned heads, faces, damaged stemsBear-in-mind, excessive valve stem- to- bore will increase oil consumption and valve breakageInsufficient will noisy and sticky valves and also disturb engine smoothness
proper size tool just listedAfter the hole has been properlythe press-fit of the stud with hypoid lubricantFinally, install new stud using Tool 3-6880The tool must bottom on the headVALVE MECHANISM
ROCKER ARM STUDS
Replace any rocker studs with damaged threads with standard studsIf the loose in the head, oversize available in 0.003" 0.010" oversizeT oversize can be installed reaming the holes with Tool 3-7515 0.003" oversize and Tool 3-6036 0.013" oversize as follows: First remove the old by placing Tool 3-5802 over the studNext, install the and washer and remove the stud by turning the nutNow, the hole oversize stud using e