4-38. CYLINDER HEAD REPAIR (Cont)
Turn reamer only in clockwise direction, both when inserting and removing reamer.
Movement in opposite direction will dull cutting edges on flutes.
Turn reamer (97) clockwise (withdraw reamer frequently to remove chips) until
lower shoulder of reamer contacts injector tube (93). Clean out all chips.
Rotate cylinder head to bottom up position. Insert pilot of cutting tool (98) into small
hole of injector tube (93).
Apply a few drops of cutting oil on tool (98). Using a socket and speed handle,
remove excess stock so lower end of injector tube (93) is from flush to 0.005 inch
below finished surface of cylinder head.
Install injector gage (99) in injector tube. Using dial indicator gage (100),
premeasure distance from fire deck to gage. Reading must be within +/-0.014 inch
of fire deck.
Wash interior of injector tube (93) to prepare for second reaming operation.