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HOMESERVICE MANUALSCHEVROLET2007COBALT L4-2.2LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECYLINDER BLOCK ASSEMBLYSPECIFICATIONS
2007 Chevrolet Cobalt L4-2.2L
Cylinder Block Assembly: Specifications
2007 Chevrolet Cobalt L4-2.2LSECTION Specifications
Block
Cylinder Head Deck Surface Flatness - Transverse 0.030 mm 0.0012 in
Cylinder Head Deck Surface Flatness - Longitude 0.050 mm 0.002 in
Cylinder Head Deck Surface Flatness - Overall 0.08 mm 0.0031 in
Connecting Rod
Connecting Rod Bearing Clearance 0.029-0.069 mm 0.0011-0.0027 in
Connecting Rod Bore Diameter - Bearing End 52.118-52.134 mm 2.0519-2.05252 in
Connecting Rod Bore Diameter - Pin End 20.007-20.021 mm 0.7877-0.7882 in
Connecting Rod Side Clearance 0.070-0.370 mm 0.0028-0.0146 in
Connecting Rod Straightness - Bend - Maximum 0.021 mm 0.0083 in
Connecting Rod Straightness - Twist - Maximum 0.04 mm 0.0157 in
Crankshaft
Connecting Rod Journal Diameter 49.000-49.014 mm 1.9291-1.9297 in
Crankshaft End Play 0.050-0.380 mm 0.0012-0.0150 in
Crankshaft Main Bearing Clearance 0.031-0.067 mm 0.0012-0.0026 in
Crankshaft Main Journal Diameter 55.994-56.008 mm 2.2045-2.2050 in
Piston Rings
Piston Ring End Gap - First Compression Ring 0.20-0.40 mm 0.008-0.016 in
Piston Ring End Gap - Second Compression Ring 0.35-0.55 mm 0.014-0.022 in
Piston Ring End Gap - Oil Control Ring - Rails 0.25-0.76 mm 0.010-0.030 in
Piston Ring to Groove Clearance - First Compression Ring 0.04-0.08 mm 0.0015-0.0031 in
Piston Ring to Groove Clearance - Second Compression Ring 0.030-0.069 mm 0.0012-0.0027 in
Piston Ring to Groove Clearance - Oil Control Ring 0.090-0.106 mm 0.0035-0.0042 in
Piston Ring Thickness - First Compression Ring 1.170-1.190 mm 0.0461-0.0469 in
Piston Ring Thickness - Second Compression Ring 1.471-1.490 mm 0.0579-0.0587 in
Piston Ring Thickness - Oil Control Ring - Rail - Maximum 0.43 mm 0.0169 in
Piston Ring Thickness - Oil Control Ring - Spacer 1.574-1.651 mm 0.0620-0.0650 in
Pistons and Pins
Pin - Piston Pin Clearance to Connecting Rod Bore 0.007-0.026 mm 0.0003-0.0010 in
Pin - Piston Pin Clearance to Piston Pin Bore 0.002-0.012 mm 0.0001-0.0005 in
Pin - Piston Pin Diameter 19.995-20.000 mm 0.7872-0.7874 in
Pin - Piston Pin End Play 0.19-1.16 mm 0.0075-0.0461 in
Piston - Piston Diameter - @14.5 mm up 85.967-85.982 mm 3.3845-3.3851 in
Piston - Piston Pin Bore Diameter 20.002-20.007 mm 0.07875-0.7877 in
Piston - Piston Ring Grove Width - Top 1.23-1.25 mm 0.0484-0.0492 in
Piston - Piston Ring Grove Width - Second 1.52-1.54 mm 0.0598-0.0606 in
Piston - Piston Ring Grove Width - Oil Control 2.52-2.54 mm 0.0992-0.1000 in
Piston - Piston To Bore Clearance 0.010-0.041 mm 0.0004-0.0016 in
Crankshaft Bearings - Lower Crankcase to Block - Bedplate
First Pass 20 N.m 15 lb ft
Final Pass 70 degrees
Lower Crankcase to Block Perimeter Bolt 25 N.m 18 lb ft
Connecting Rod Bolt
First Pass 25 N.m 18 lb ft
Final Pass 100 degrees
Crankshaft Balancer Bolt
First Pass 100 N.m 74 lb ft
Final Pass 125 degrees
Cylinder Head Deck Surface Flatness - Transverse 0.030 mm 0.0012 in
Cylinder Head Deck Surface Flatness - Longitude 0.050 mm 0.002 in
Cylinder Head Deck Surface Flatness - Overall 0.08 mm 0.0031 in
Connecting Rod
Connecting Rod Bearing Clearance 0.029-0.069 mm 0.0011-0.0027 in
Connecting Rod Bore Diameter - Bearing End 52.118-52.134 mm 2.0519-2.05252 in
Connecting Rod Bore Diameter - Pin End 20.007-20.021 mm 0.7877-0.7882 in
Connecting Rod Side Clearance 0.070-0.370 mm 0.0028-0.0146 in
Connecting Rod Straightness - Bend - Maximum 0.021 mm 0.0083 in
Connecting Rod Straightness - Twist - Maximum 0.04 mm 0.0157 in
Crankshaft
Connecting Rod Journal Diameter 49.000-49.014 mm 1.9291-1.9297 in
Crankshaft End Play 0.050-0.380 mm 0.0012-0.0150 in
Crankshaft Main Bearing Clearance 0.031-0.067 mm 0.0012-0.0026 in
Crankshaft Main Journal Diameter 55.994-56.008 mm 2.2045-2.2050 in
Piston Rings
Piston Ring End Gap - First Compression Ring 0.20-0.40 mm 0.008-0.016 in
Piston Ring End Gap - Second Compression Ring 0.35-0.55 mm 0.014-0.022 in
Piston Ring End Gap - Oil Control Ring - Rails 0.25-0.76 mm 0.010-0.030 in
Piston Ring to Groove Clearance - First Compression Ring 0.04-0.08 mm 0.0015-0.0031 in
Piston Ring to Groove Clearance - Second Compression Ring 0.030-0.069 mm 0.0012-0.0027 in
Piston Ring to Groove Clearance - Oil Control Ring 0.090-0.106 mm 0.0035-0.0042 in
Piston Ring Thickness - First Compression Ring 1.170-1.190 mm 0.0461-0.0469 in
Piston Ring Thickness - Second Compression Ring 1.471-1.490 mm 0.0579-0.0587 in
Piston Ring Thickness - Oil Control Ring - Rail - Maximum 0.43 mm 0.0169 in
Piston Ring Thickness - Oil Control Ring - Spacer 1.574-1.651 mm 0.0620-0.0650 in
Pistons and Pins
Pin - Piston Pin Clearance to Connecting Rod Bore 0.007-0.026 mm 0.0003-0.0010 in
Pin - Piston Pin Clearance to Piston Pin Bore 0.002-0.012 mm 0.0001-0.0005 in
Pin - Piston Pin Diameter 19.995-20.000 mm 0.7872-0.7874 in
Pin - Piston Pin End Play 0.19-1.16 mm 0.0075-0.0461 in
Piston - Piston Diameter - @14.5 mm up 85.967-85.982 mm 3.3845-3.3851 in
Piston - Piston Pin Bore Diameter 20.002-20.007 mm 0.07875-0.7877 in
Piston - Piston Ring Grove Width - Top 1.23-1.25 mm 0.0484-0.0492 in
Piston - Piston Ring Grove Width - Second 1.52-1.54 mm 0.0598-0.0606 in
Piston - Piston Ring Grove Width - Oil Control 2.52-2.54 mm 0.0992-0.1000 in
Piston - Piston To Bore Clearance 0.010-0.041 mm 0.0004-0.0016 in
Crankshaft Bearings - Lower Crankcase to Block - Bedplate
First Pass 20 N.m 15 lb ft
Final Pass 70 degrees
Lower Crankcase to Block Perimeter Bolt 25 N.m 18 lb ft
Connecting Rod Bolt
First Pass 25 N.m 18 lb ft
Final Pass 100 degrees
Crankshaft Balancer Bolt
First Pass 100 N.m 74 lb ft
Final Pass 125 degrees
RENDER: 1.0x
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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.