Coolant Air Bleed Pipe Installation

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Important: Install the pipe gaskets properly onto the pipe and covers.

Position the gasket O-ring seal onto the nipple portion of the pipe.

Install the gaskets onto the engine coolant air bleed pipe and covers.

Fig 1: Installing Gaskets Onto Engine Coolant Air Bleed Pipe & Covers
Courtesy of GENERAL MOTORS CORP.
Install the pipe (2) and gaskets (3) onto the cylinder heads.
CAUTION: 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.
Install the pipe bolts (1).
Install the two pipe studs to the front of the engine.

Tighten

Tighten the pipe bolts to 12 N.m (106 lb in).

Fig 2: Installing Coolant Air Bleed Pipe, Gaskets & Bolts
Courtesy of GENERAL MOTORS CORP.
Install the covers (2), gaskets (3), and bolts (1) onto the rear of the engine.
Tighten

Tighten the cover bolts to 12 N.m (106 lb in).

Fig 3: Installing Covers, Gaskets & Bolts
Courtesy of GENERAL MOTORS CORP.
Install the hose and clamp (1) onto the pipe (2).

Fig 4: Installing Hose & Clamp Onto Pipe
Courtesy of GENERAL MOTORS CORP.