Cylinder head repair conditions may warrant cylinder head pressure testing before
complete head disassembly. Testing should be performed before injector tubes,
cup plugs, and pipe plugs are removed. Refer to Inspection steps 1 thru 9 for
IF WORN, DAMAGED, OR LEAKING, REPLACE INJECTOR TUBES BY PLACING INJECTOR TUBE
lNSTALIATION/REMOVAL TOOL (28) IN INJECTOR TUBE. INSERT PILOT (29) THRU SMALL
OPENING OF INJECTOR TUBE AND THREAD PILOT INTO TAPPED HOLE IN END OF
USING BRASS HAMMER OR FIBER MALLET, TAP ON END OF PILOT (29). CAREFULLY DRIVE
AND LIFT INJECTOR TUBE, lNSTALLATION/REMOVAL TOOL (28), AND PILOT (29) FROM
CYLINDER HEAD. IF INJECTOR TUBE O-RING IS NOT REMOVED WITH INJECTOR TUBE,
REMOVE O-RING FROM CYLINDER HEAD CASTING AT UPPER END OF INJECTOR TUBE BORE.
DISCARD INJECTOR TUBE AND O-RING SEAL.
REMOVE CUP PLUGS BY PIERCING WITH SCREWDRIVER OR CHISEL AND PRYING PLUG OUT
UNSCREW PIPE PLUGS AND FUSE PLUG.