80. Cylinder Head Installation - Left

1. Clean the cylinder head gasket surfaces. Refer to Replacing Engine Gaskets.
2. Install the cylinder head locating pins, if removed.





Important: Make sure the threaded holes in the engine block are clean and not damaged. Do not use sealer on any engines that use a composition type gasket. Align the cylinder head gasket locating mark to face up.

3. Place the cylinder head gasket in position over the cylinder head locating pins (1).





Important: Guide the cylinder head carefully into place over the locating pins (1) and the cylinder head gasket.

4. Install the cylinder head to the block.

Notice: Always use NEW cylinder head bolts when servicing the cylinder head.
Do not reuse the cylinder head bolts, because the bolts may stretch or break causing engine damage.

Important: The sealer must be applied to a minimum of eight threads starting at the point of the cylinder head bolt.

5. If not pre-applied to the new cylinder head bolts, apply sealer GM P/N 12346004 or equivalent to the cylinder head bolts. Refer to Use of RTV and Anaerobic Sealer.





6. Loosely install the cylinder head bolts (1 and 2).





Notice: Refer to Fastener Notice in Service Precautions.

7. Install the cylinder head bolts.
7.1. First Pass
^ Tighten the cylinder head bolts to 50 Nm (37 ft. lbs.).
7.2. Final Pass
150° bolt #1, 2, 3, 6, 7, 8, 9, 12, 14, 15
150° bolt #13, 16
90° bolt #4, 5, 10, 11
8. Install the spark plugs.
^ Tighten the spark plugs in a new cylinder head to 30 Nm (22 ft. lbs.).
^ Tighten the spark plugs in serviced cylinder heads to 20 Nm (15 ft. lbs.).