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Home >> Chevrolet >> 2007 >> Impala V6-3.5L >> Repair and Diagnosis >> Specifications >> Mechanical Specifications >> Engine >> Cylinder Head Assembly
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Cylinder Head Assembly

Cylinder Head
Combustion Chamber Depth - at Measurement Point 2.2 mm 0.087 in
Surface Finish - Maximum 2.8 RA
Surface Flatness - Block Deck 0.08 mm Per 152 mm 0.003 in Per 6 in
Surface Flatness - Exhaust Manifold Deck 0.1 mm 0.004 in
Surface Flatness - Intake Manifold Deck 0.1 mm 0.004 in
Valve Guide Bore - Exhaust 8.01 mm 0.315 in
Valve Guide Bore - Intake 8.01 mm 0.315 in
Valve Guide Installed Height 16.6 mm 0.654 in

Cylinder Head Bolt





Notice: This component uses torque-to-yield bolts. When servicing this component do not reuse the bolts, New torque-to-yield bolts must be installed. Reusing used torque-to-yield bolts will not provide proper bolt torque and clamp load. Failure to install NEW torque-to-yield bolts may lead to engine damage.

First Pass 60 N.m 44 lb ft
Final Pass 95 degrees

Exhaust Manifold Bolt 20 N.m 15 lb ft

Upper Intake Manifold Bolt/Stud 25 N.m 18 lb ft

Lower Intake Manifold Bolt - Center





First Pass 7 N.m 62 lb in
Final Pass 13 N.m 115 lb in

Lower Intake Manifold Bolt - Corner





First Pass 7 N.m 62 lb in
Final Pass 25 N.m 18 lb ft

Camshaft sprocket bolts Tighten the bolts to 16 N.m (12 lb ft).