Cylinder Head: Installation
- Clean threads in the block using a 7/16-14 tap. Clean bolt threads using a wire brush. Install head gasket with arrow pointing to front of engine.NOTE: Head gaskets are not interchangeable. Failure to install with arrow pointing to front will cause gasket failure and possible engine failure.
- Apply sealant GM P/N 1052080 or equivalent to underside of the bolt heads. Apply thread locker GM P/N 12345382 or equivalent to bolt threads. Install cylinder head and cylinder head bolts.
- Tighten cylinder head bolts to 47 N.m (35 lb.ft.) in the sequence shown in Fig. Fig 1 . Rotate each bolt 130 degrees in sequence using J 36660. Rotate the center four bolts an additional 30 degrees in sequence using J 36660.
- Install pushrods, guide plate and rocker arm assemblies: Apply thread lock compound GM P/N 12345493 or equivalent to rocker arm pedestal bolts before assembly. Tighten rocker arm pedestal bolts to 25 N.m + 70 degrees (19 lb.ft + 70 degrees).
- Install intake manifold, rocker arm cover, exhaust manifold. Install and tighten A/C compressor bracket bolt to 70 N.m (52 lb.ft.). Install generator support bracket to cylinder head. Install generator.
- Install electronic ignition and spark plug wires. Install belt tensioner assembly, power steering pump, and fuel pipe heat shield.