Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Important:
• Apply teflon sealer GM P/N 1236004 on the threads
of the studs that are second to the end on both intake manifolds. There are
a total of four studs which require the teflon sealer. • Apply threadlocker GM P/N 12345493 on the threads
of the remaining studs.
Tighten
Tighten the intake manifold studs to 42 N·m (31 lb ft).
Tighten
Tighten the bracket nuts to 23 N·m (17 lb ft).
Tighten
Tighten the center intake manifold bolts to 23 N·m (17 lb ft).