Hummer H3. Manual — part 401

Fig. 437: View Of Pusher Block
Courtesy of GENERAL MOTORS CORP.

7. Align the pusher block (2) of cylinder bore sleeve installer EN 45680-403 into the groove

of fixture EN 45680-401 (1).

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 438: Installing Cylinder Bore Sleeve Into Engine Block Using Tool
Courtesy of GENERAL MOTORS CORP.

8. Using a ratchet, rotate the threaded shaft of fixture EN 45680-401/cylinder bore sleeve

installer EN 45680-403 assembly (1) in order to install the cylinder bore sleeve (117) into
the engine block (100).

NOTE:

Do not use any air powered or electric tools to rotate the
threaded shaft of the fixture EN 45680-401/cylinder bore sleeve
installer EN 45680-403 assembly or damage to the cylinder
bore sleeve will occur.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

9. Do not completely seat the cylinder bore sleeve in the block. Leave approximately 1/16

inch of the cylinder bore sleeve above the surface of the cylinder block.

Fig. 439: Seating Cylinder Bore Sleeve Completely Using Tool
Courtesy of GENERAL MOTORS CORP.

10. Using a torque wrench, torque the threaded shaft of the fixture EN 45680-401/cylinder bore

sleeve installer EN 45680-403 assembly to 102 N.m (75 lb ft) in order to completely seat
the cylinder bore sleeve in the cylinder block. With the cylinder bore sleeve properly
installed, a minimal portion of the cylinder bore sleeve flange will protrude above the block
deck surface.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 440: View Of Service Tool Assembly
Courtesy of GENERAL MOTORS CORP.

11. Remove the fixture EN 45680-401/cylinder bore sleeve installer EN 45680-403 assembly

(1) from the cylinder block (100).

Cylinder Sleeve Trimming

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3