* Head bolt type: Are they original bolts, or aftermarket replacements? Aftermarket bolts may have different torque specifications.
* Head gasket material: The gasket material influences the clamping force needed.
* Sequence: The tightening sequence is crucial to ensure even clamping pressure and prevent warping. This sequence is usually specified in a diagram.
Therefore, you MUST consult a repair manual specific to your 1997 Vortec 350 engine. This manual will provide the correct torque specifications, tightening sequence, and any other crucial information for properly torquing your cylinder heads. Using the incorrect torque or sequence can lead to serious engine damage.
You can find these manuals at:
* Your local auto parts store: Many stores carry repair manuals.
* Online retailers: Amazon, eBay, and other online retailers sell repair manuals in print or digital format.
* Online repair databases: Some websites offer access to repair information for a fee.
Do not attempt this repair without the proper information. Incorrect torque can lead to a blown head gasket, warped heads, or even catastrophic engine failure.
