Hummer H3. Manual — part 243

Fig. 588: View Of Piston Alignment Mark & Flat Casting Boss
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The piston and cylinder bore have been measured and the

bore has been sized for the proper clearance. Install the
piston and connecting rod assembly into the proper cylinder
bore. The piston alignment mark MUST face the front of the
engine block (1) or the flat casting boss (2).

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

9. Install the connecting rod and piston into the proper cylinder bore.

Fig. 589: Installing Piston
Courtesy of GENERAL MOTORS CORP.

10. Hold EN-47701 firmly against the engine block. See Special Tools. Using a wooden

hammer handle, lightly tap the top of the piston until all of the piston rings enter the cylinder
bore.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 590: View Of Connecting Rod, Cap & Bolts
Courtesy of GENERAL MOTORS CORP.

11. Guide the connecting rod end onto the crankshaft journal.

Use J 41556 to pull the connecting rod into place. See Special Tools.

12. Install the connecting rod bearing, cap, and bolts.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Tighten:

1. Tighten the connecting rod bearing cap bolts on the first pass to 25 N.m (18 lb ft).

2. Use J 45059 to tighten the connecting rod bearing cap bolts on the second pass an

additional 110 degrees. See Special Tools.

Fig. 591: Tapping Connecting Rod Assembly Parallel To Crankshaft
Courtesy of GENERAL MOTORS CORP.

13. With the pistons and connecting rods installed, use a soft faced mallet and lightly tap each

connecting rod assembly parallel to the crankshaft.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3