3-35. CYLINDER HEAD AND VALVE REPAIR (Contd)
c. Inspection and Repair (Contd)
(11) Before starting drill press
sleeves (7) (Contd)
motor, insert bead cutting tool
(48), pilot (49), and holder (50) in
injector sleeve bore of cylinder
head (9) to ensure proper
(12) Lubricate cutter (48) with
Raise cutter (48) high enough
Use extreme caution when cutting injector sleeve seat.
Do not run drill press at speeds higher than 75 rpm. Tool chatter may occur at speeds
higher than 75 rpm, damaging injector sleeve bore.
Do not cut more than 0.010 in. (0.254 mm) deep into cylinder head.
(13) Turn on drill press motor
When proper cut depth has
and make a very light cut.
been reached, allow cutter (48) to
turn in position for about 10 sec-
onds to ensure a good seat and
(14) Remove cutter (48), holder
(50), and pilot (49) from drill
(15) Remove bead cutting tool (48)
Use injector seat cutting tool
from holder (50) and pilot (49),
(ST-824) (51) to cut a 70 chamfer
and install injector seat cutting
at top edge of 60 seat. Apply
Prussian blue compound to 60
seat to aid in determining amount
of chamfer needed.
(16) Lubricate and position
Lubricate cutter (51) with cutting
cutter (51), holder (50), and
pilot (49) on seat.
(17) Rotate cutter (51) while
Use tap wrench. Remove cutter
applying even pressure.
(51), holder (50), and pilot (49)
when lower edge of 70 relief
chamfer is about 0.125 in.
(3.175 mm) from top of bead.
To prevent damage to injector sleeve during installation, ensure sleeve seat is free from oil,
carbon, or any other foreign material.
(18) Remove any bluing
compound left on injector seat