MTU Detroit Diesel 183 Series Technical Publication page 68

Group 00
Subgroup 0901
Page 2
Special tools
20080/1 E 98-12
Repair
Drill blind hole open with drill
Note
Do not countersink bore
Re-cut damaged thread with special Heli-Coil tapped
drill.
Mount spindle (1) and mouth piece (2) appropriate to
thread on installation tool.
Note
Groove on mouthpiece (2) must be aligned with
markings on installation tool (arrows).
General