Engine Coolant Air Bleed Pipe and Hole Cover Cleaning and Inspection

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Coolant Air Bleed Pipe Seal

Courtesy of GENERAL MOTORS CORP.

NOTE:

Do not use the engine coolant air bleed pipe and cover seals again. Upon installation of the pipe and covers, install NEW seals.

Remove the seals (308) from the pipe and covers.

Fig 2: Coolant Air Bleed Pipe Components

Courtesy of GENERAL MOTORS CORP.

Clean the pipe and covers in solvent.

WARNING:

Refer to Safety Glasses and Compressed Air Warning .

Dry the pipe and covers with compressed air.
Inspect the pipe and covers for restrictions within the pipe (1) or damaged sealing surfaces (2, 3).