The service manual will provide torque values for:
* Cylinder Heads: This is crucial and varies depending on the head bolts and whether they're being installed for the first time, or a retorque is being performed.
* Connecting Rods: Requires very precise torqueing.
* Main Bearing Caps: Another critical area requiring precise torqueing, often in stages.
* Intake Manifold: Depends on the specific intake manifold used.
* Exhaust Manifolds: Similarly, depends on the manifolds used.
* Valve Covers: Generally lower torque values.
* Oil Pan: Relatively low torque.
* Other fasteners: Numerous other smaller fasteners throughout the engine.
Attempting to tighten engine components without the correct torque specifications from a service manual can lead to:
* Stripped Threads: Over-tightening can easily strip the threads.
* Broken Bolts: Over-tightening can break the bolts.
* Damaged Engine Components: Incorrect torque can warp cylinder heads or damage other components.
* Leaks: Under-tightening can result in leaks.
In short: Don't attempt any work on a 1979 Pontiac 455 without the correct service manual. The cost of a manual is far less than the cost of repairing engine damage caused by incorrect torque values.
