Lower Manifold
LOWER INTAKE MANIFOLD TORQUE AND TIGHTENING SEQUENCE
NOTE: Proper lower intake manifold fastener tightening sequence (as shown in the image) and torque is critical. Always follow the tightening sequence, and torque the intake manifold bolts using the 3-step method below. Failing to do so may distor the crankshaft bearing bore alignment and cause damage to the crankshaft bearings.
1. Tighten the bolts on the first pass in sequence (1-8) to 3 Nm (27 lb.in.).
2. Tighten the bolts on the second pass in sequence (1-8) to 12 Nm (106 lb.in.).
3. Tighten the bolts on the final pass in sequence (1-8) to 15 Nm (11 lb.ft.).