Cylinder Head Specifications

^ Tools Required
- J 36660-A Torque/Angle Meter





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. The tabs on the bottom of the head gasket should be positioned at the front cylinder location when properly installed.

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

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

2. 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.

3. If not pre-applied to the new cylinder head bolts, apply sealer GM P/N 12346004 or equivalent to the cylinder head bolts.





Notice: Refer to Fastener Notice in Service Precautions.

Important: The long bolts are used in locations 1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16 and 17. The medium length bolts are used in locations 15 and 18. The short bolts are used in locations 4, 5, 12 and 13.





4. Install the cylinder head bolts.
4.1. Tighten the bolts a first pass in sequence to 30 Nm (22 ft. lbs.).
4.2. Retighten the bolts in a second pass in sequence to 30 Nm (22 ft. lbs.), then an additional 120° using the J 36660-A.
4.3. Tighten the bolts (1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16, 17) an additional 60°, bolts (15 and 18) an additional