Intake Manifold Installation

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Intake Manifold Gasket

Courtesy of GENERAL MOTORS COMPANY

NOTE:

The intake manifold, throttle body, fuel injection rail, and fuel injectors may be removed as an assembly. If not servicing the individual components, install the intake manifold as a complete assembly.
DO NOT use the intake manifold gaskets again. Install NEW intake manifold-to-cylinder head gaskets.

Install NEW intake manifold-to-cylinder head gaskets (514).

Fig 2: Intake Manifold And Bolts

Courtesy of GENERAL MOTORS COMPANY

Install the intake manifold (500).
Apply a 5 mm (0.20 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489) to the threads of the intake manifold bolts (512). Refer to Adhesives, Fluids, Lubricants, and Sealers .

Fig 3: Identifying Intake Manifold Bolt Tightening Sequence

Courtesy of GENERAL MOTORS COMPANY

CAUTION:

Refer to Fastener Caution .

Install the intake manifold bolts.
1. Tighten the intake manifold bolts (1 - 10) a first pass in sequence to 5 N.m (44 lb in).
2. Tighten the intake manifold bolts (1 - 10) a final pass in sequence to 10 N.m (89 lb in).

Fig 4: MAP Sensor Components

Courtesy of GENERAL MOTORS COMPANY

Install the fuel rail. Refer to Fuel Rail and Injectors Installation .
Lubricate the manifold absolute pressure (MAP) sensor grommet (715) with clean engine oil.
Install the grommet onto the MAP sensor (714).
Install the MAP sensor and retainer (736).

Fig 5: PCV Hose - Dirty Air

Courtesy of GENERAL MOTORS COMPANY

Install the positive crankcase ventilation (PCV) hose - dirty air (716).