Hummer H1 (2006+). Manual - part 38

2-58

Engine

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Gear-to-Housing Clearance - Drive/Driven - Production Value 

• 0.125-0.221þmm

• 0.0049-0.0087þin

Piston Rings

Piston Ring End Gap-First Compression Ring - Service Limit 

• 1.37þmm

• 0.0539þin

Piston Ring End Gap-First Compression Ring - Production Value 

• 0.3-0.45þmm

• 0.0118-0.0177þin

Piston Ring End Gap-Second Compression Ring - Service Limit 

• 1.35þmm

• 0.0531þin

Piston Ring End Gap-Second Compression Ring - Production Value 

• 0.50-0.65þmm

• 0.0197-0.0256þin

Piston Ring End Gap-Oil Control Ring - Service Limit 

• 1.20þmm

• 0.0472þin

Piston Ring End Gap-Oil Control Ring - Production Value 

• 0.15-0.35þmm

• 0.0059-0.0138þin

Piston Ring to Groove Clearance-First Compression Ring - Service Limit 

• 0.26þmm

• 0.0102þin

Piston Ring to Groove Clearance-First Compression Ring - Production Value 

• 0.08-0.17þmm

• 0.0030-0.0067þin

Piston Ring to Groove Clearance-Second Compression Ring - Service Limit 

• 0.10þmm

• 0.0039þin

Piston Ring to Groove Clearance-Second Compression Ring - Production Value 

• 0.01-0.03þmm

• 0.0004-0.0012þin

Piston Ring to Groove Clearance-Oil Control Ring - Service Limit 

• 0.12þmm

• 0.0047þin

10-1-08

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 Engine  2-59

5745804

Piston Ring to Groove Clearance-Oil Control Ring - Production Value 

• 0.01-0.03þmm

• 0.0004-0.0012þin

Pistons and Pins

Piston Diameter 

• 102.948-102.960þmm

• 4.0531-4.0535þin

Piston Pin Bore Diameter 

• 34.504-34.512þmm

• 1.3584-1.3587þin

Pin-Piston Pin Clearance to Piston Pin Bore - Service Limit 

• 0.017þmm

• 0.0007þin

Pin-Piston Pin Clearance to Piston Pin Bore - Production Value 

• 0.004-0.017þmm

• 0.0002-0.0007þin

Pin-Piston Pin Diameter - Service Limit 

• 34.45þmm

• 1.3563þin

Pin-Piston Pin Diameter - Production Value 

• 34.495-34.5þmm

• 1.3581-1.3583þin

Starter

Rated Output 

• 3.5þKW

Turbocharger

Axial Play 

• 0.11þmm

• 0.0043þin

Radial Play 

• 0.20þmm

• 0.0079þin

Valve System

Valve Face Angle - Production Value 

• 45þdegrees

10-1-08

2-60

Engine

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Valves-Valve Face Width - Service Limit 

• 2.5þmm

• 0.0984þin

Valve Face Width - Production Value 

• 2.1þmm

• 0.0827þin

Valve Head Diameter - Exhaust 

• 31.0þmm

• 1.22þin

Valve Head Diameter - Intake 

• 33.0þmm

• 1.30þin

Valve Seat Angle 

• 45þdegrees

Valve Stem Diameter 

• 7.0þmm

• 0.28þin

Valve Stem Oil Seal Installed Height 

• 6.05þmm

• 0.2382þin

Valve Stem-to-Guide Clearance - Service Limit 

• 0.20þmm

• 0.0079þin

Valve Stem-to-Guide Clearance - Exhaust - Production Value 

• 0.038-0.071þmm

• 0.0015-0.0028þin

Valve Stem-to-Guide Clearance - Intake - Production Value 

• 0.030-0.063þmm

• 0.0012-0.0025þin

Valve Stem-to-Guide Clearance 

• 0.20þmm

• 0.0079þin

Valve Lifters/Push Rods-Push Rod Straightness 

• 0.8þmm

• 0.0315þin

Valve Spring Free Length - Production Value 

• 56.6þmm

• 2.2283þin

10-1-08

______________________________________________________________________

 Engine  2-61

5745804

Valve Spring Installed Height - Production Value 

• 41þmm

• 1.6142þin

Valve Spring Load - Exhaust - Service Limit 

• 275þN at 41þmm

• 61.8þlb at 1.61þin

Valve Spring load - Exhaust - Production Value 

• 315-363þN at 41þmm

• 71-81.6þlb at 1.61þin

Valve Spring Load - Intake - Service Limit 

• 306þN at 41þmm

• 68.8þlb at 1.61þin

Valve Spring Load - Intake - Production Value 

• 315-363þN at 41þmm

• 71-81.6þlb at 1.61þin

10-1-08