Cylinder Head Gasket Selection Specifications
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of GENERAL MOTORS CORP.
| Callout |
Component Name |
| 1 |
Grade A |
| 2 |
Grade B |
| 3 |
Grade C |
| 4 |
Block Over-Bored |
| 5 |
Block Over-Bored and Deck Milled |
| Cylinder Head Gasket Grade |
Ti Max (Piston Projection) |
Compressed Gasket Thickness |
| Metric (mm) |
English (in) |
Metric (mm) |
English (in) |
| Grade A |
0.223 -0.274 |
0.0088 -0.0108 |
0.90-1.00 |
0.0354-0.0394 |
| Grade B |
0.274-0.325 |
0.0108-0.0128 |
0.95-1.05 |
0.0374-0.0413 |
| Grade C |
0.325-0.376 |
0.0128-0.0148 |
1.00-1.10 |
0.0394-0.0433 |
| Block Over-Bored 0.010-0.030 in (0.254-0.762 mm) |
0.223-0.376 |
0.0088-0.0148 |
1.00-1.10 |
0.0394-0.0433 |
| Block Over-Bored 0.010-0.030 in (0.254-0.762 mm) and Deck Milled 0.008 in (0.203 mm) |
0.4257-0.5777 |
0.0168-0.0228 |
1.25-1.35 |
0.0492-0.0532 |