Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2010COLORADO 2WD L5-3.7LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECYLINDER BLOCK ASSEMBLYSPECIFICATIONS
2010 Chevrolet Colorado 2WD L5-3.7L
Cylinder Block Assembly: Specifications
2010 Chevrolet Colorado 2WD L5-3.7LSECTION Specifications
SURFACE VARIATION - HEAD-TO-BLOCK
Block
Cylinder Head Deck Surface Flatness 0.08 mm (0.003 in)
Cylinder Head
Surface Flatness - Block Deck 0.08 mm (0.003 in)
CYLINDER BORE DIAMETER
Cylinder Bore Diameter 95.490-95.506 mm (3.7623-3.7629 in)
CYLINDER OUT OF ROUND
Cylinder Bore Out-of-Round 0.13 mm (0.0005 in)
CRANKSHAFT JOURNAL DIAMETER & LIMITS
Crankshaft Main Journal Diameter 69.968-69.984 mm (2.7567-2.7574 in)
Crankshaft Main Journal Out-of-Round 0.005 mm (0.0002 in)
Crankshaft Main Journal Taper 0.005 mm (0.0002 in)
Crankshaft Rod Journal Diameter 56.7 mm (2.234 in)
Crankshaft End Play 0.112-0.388 mm (0.0044-0.0153 in)
MAIN BEARING CLEARANCE, STANDARD & LIMIT
Crankshaft Main Bearing Clearance 0.012-0.064 mm (0.0004-0.0025 in)
Crankshaft Main Bearing Bore Diameter 78.070-78.088 mm (3.0760-3.0766 in)
MAIN BEARING CAP TORQUE AND SEQUENCE

Crankshaft Main Bearing Cap Bolts
First Pass 25 Nm (18 lb ft)
Final Pass 180 degrees
CONNECTING ROD SIDE CLEARANCE, OUT-OF-ROUND & DIAMETER
Connecting Rod Side Clearance 0.05-0.35 mm (0.0019-0.0137 in)
Connecting Rod Bore Out-of-Round - Bearing End 0.006 mm (0.0002 in)
Connecting Rod Bore Diameter - Bearing End 60.322-60.338 mm (2.3749-2.3755 in)
CONNECTING ROD BEARING CLEARANCE
Connecting Rod Bearing Clearance 0.021-0.065 mm (0.0008-0.0025 in)
PISTON DIMENSIONS AND CLEARANCES
Piston Diameter 95.573-95.588 mm (3.7627-3.7633 in)
Piston to Bore Clearance -0.013-0.034 mm (0.0004-0.0017 in)
PISTON RING GAP & GROOVE CLEARANCE
Piston Ring End Gap
First Compression Ring 0.2-0.4 mm (0.0079-0.0157 in)
Second Compression Ring 0.36-0.51 mm (0.0142-0.0201 in)
Oil Control Ring 0.250-0760 mm (0.0098-0.0299 in)
Piston Ring to Grove Clearance
First Compression Ring 0.043-0.093 mm (0.0017-0.0037 in)
Second Compression Ring 0.053-0.093 mm (0.0021-0.0037 in)
Oil Control Ring 0.059-0.215 mm (0.0023-0.0085 in)
CRANKSHAFT PULLEY TORQUE
Crankshaft Balancer Bolt
First Pass 150 Nm (110 lb ft)
Final Pass 180 degrees
Block
Cylinder Head Deck Surface Flatness 0.08 mm (0.003 in)
Cylinder Head
Surface Flatness - Block Deck 0.08 mm (0.003 in)
CYLINDER BORE DIAMETER
Cylinder Bore Diameter 95.490-95.506 mm (3.7623-3.7629 in)
CYLINDER OUT OF ROUND
Cylinder Bore Out-of-Round 0.13 mm (0.0005 in)
CRANKSHAFT JOURNAL DIAMETER & LIMITS
Crankshaft Main Journal Diameter 69.968-69.984 mm (2.7567-2.7574 in)
Crankshaft Main Journal Out-of-Round 0.005 mm (0.0002 in)
Crankshaft Main Journal Taper 0.005 mm (0.0002 in)
Crankshaft Rod Journal Diameter 56.7 mm (2.234 in)
Crankshaft End Play 0.112-0.388 mm (0.0044-0.0153 in)
MAIN BEARING CLEARANCE, STANDARD & LIMIT
Crankshaft Main Bearing Clearance 0.012-0.064 mm (0.0004-0.0025 in)
Crankshaft Main Bearing Bore Diameter 78.070-78.088 mm (3.0760-3.0766 in)
MAIN BEARING CAP TORQUE AND SEQUENCE
Crankshaft Main Bearing Cap Bolts
First Pass 25 Nm (18 lb ft)
Final Pass 180 degrees
CONNECTING ROD SIDE CLEARANCE, OUT-OF-ROUND & DIAMETER
Connecting Rod Side Clearance 0.05-0.35 mm (0.0019-0.0137 in)
Connecting Rod Bore Out-of-Round - Bearing End 0.006 mm (0.0002 in)
Connecting Rod Bore Diameter - Bearing End 60.322-60.338 mm (2.3749-2.3755 in)
CONNECTING ROD BEARING CLEARANCE
Connecting Rod Bearing Clearance 0.021-0.065 mm (0.0008-0.0025 in)
PISTON DIMENSIONS AND CLEARANCES
Piston Diameter 95.573-95.588 mm (3.7627-3.7633 in)
Piston to Bore Clearance -0.013-0.034 mm (0.0004-0.0017 in)
PISTON RING GAP & GROOVE CLEARANCE
Piston Ring End Gap
First Compression Ring 0.2-0.4 mm (0.0079-0.0157 in)
Second Compression Ring 0.36-0.51 mm (0.0142-0.0201 in)
Oil Control Ring 0.250-0760 mm (0.0098-0.0299 in)
Piston Ring to Grove Clearance
First Compression Ring 0.043-0.093 mm (0.0017-0.0037 in)
Second Compression Ring 0.053-0.093 mm (0.0021-0.0037 in)
Oil Control Ring 0.059-0.215 mm (0.0023-0.0085 in)
CRANKSHAFT PULLEY TORQUE
Crankshaft Balancer Bolt
First Pass 150 Nm (110 lb ft)
Final Pass 180 degrees
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.