Intake Manifold, Lower Section, With Fuel Rail: Removing

WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, 2010 Audi S5, 2009 Audi S5, and 2008 Audi S5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The Following Removal And Installation Procedure Is For The Left Lower Section Of The Intake Manifold. The Procedure For The Other Side Is Identical.

WARNING:

There Is A Risk Of Injury Because The Fuel Is Under Very High Pressure.

The fuel pressure must be reduced to residual pressure before opening the high pressure area of the fuel injection system. Refer to BEFORE OPENING HIGH PRESSURE FUEL INJECTION SYSTEM .

-- Reduce fuel pressure in high pressure area. Refer to BEFORE OPENING HIGH PRESSURE FUEL INJECTION SYSTEM .

-- Disconnect the vacuum hose on the vacuum diaphragm for the intake manifold flap.

-- Counterhold the threaded connection and remove the fuel high pressure line union nut on the high pressure pump.

-- Disconnect the connector -1- on the intake manifold runner position sensor and disconnect the vacuum hose -2-.

-- Remove the union nut -3- while counterholding the threaded connection.

Fig 1: Identifying Intake Manifold Lower Section

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows- and remove the intake manifold lower section and fuel rail.

CAUTION:

The Engine Could Be Destroyed.

Cover the intake channels with a clean cloth to prevent small particles from getting into the engine through the intake channels in the cylinder heads.