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 MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 309 (ENGINE MECHANICAL)SPECIFICATIONSTHREAD REPAIR SPECIFICATIONSCYLINDER HEAD - TOP/END VIEWS
2008 Pontiac Grand Prix Base
Cylinder Head - Top/End Views
2008 Pontiac Grand Prix BaseSECTION Cylinder Head - Top/End Views
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
| Hole | Thread Size | Insert | Drill | Counterbore Tool | Tap | Driver | Drill Depth - Maximum mm (in) | Tap Depth - Maximum mm (in) |
|---|---|---|---|---|---|---|---|---|
| J 42385- | ||||||||
| 1 | M8 x 1.25 | 210 | 206 | 207 | 208 | 209 | 26.5 (1.04) | 19.0 (0.784) |
| 2 | M6 x 1.0 | 205 | 201 | 202 | 203 | 204 | 20.05 (0.789) | 16.05 (0.632) |
| 3 | M10 x 1.5 | 215 | 211 | 212 | 213 | 214 | 28.0 (1.10) | 20.0 (0.787) |
| 4 | M6 x 1.0 | 205 | 201 | 202 | 203 | 204 | 22.5 (0.885) | 15.0 (0.688) |
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.