The head gaskets were replaced on this vehicle a.

Install the upper intake manifold (2) onto the lower intake manifold.
Notice: Refer to Fastener Notice in Service Precautions.

Install the upper intake manifold bolts (1, 3, 4).
Tighten the upper intake manifold bolt (3) to 15 Nm (11 ft. Lbs.).
Tighten the nine upper intake manifold bolts (4) to 10 Nm (89 inch lbs.).
Tighten the two upper intake manifold bolts (1) to 30 Nm (22 ft. Lbs.).

Install the throttle body (3) and gasket (4).
Install the throttle body bolt (1) and nuts (2).
Tighten the throttle body nuts (2) to 10 Nm (89 inch lbs.).
Tighten the throttle body bolt (1) to 10 Nm (89 inch lbs.).