Knock Sensor

NOTE:

In the process for removing and installing the knock sensors, the fuel line must be opened. Observe the safety precautions. Refer to SAFETY PRECAUTIONS .

WARNING:

The fuel injection system is divided into a high pressure side (maximum approximately 120 bar) and a low pressure side (approximately 6 bar).

Before opening high pressure side, e.g. removing high pressure pump, fuel rail, fuel injectors, fuel pipe or fuel metering valve -N290- or fuel metering valve 2 -N402-, fuel pressure in high pressure side must be reduced to a residual pressure of 6 bar. The procedure for this is as follows. Refer to RELEASING PRESSURE ON HIGH PRESSURE SIDE .

Removing

-- Remove intake manifold:

Vehicles with aluminum intake manifolds, refer to INTAKE MANIFOLD .

Vehicles with plastic intake manifolds, refer to INTAKE MANIFOLD .

-- Then, according to need, remove Knock Sensor (KS) 1 -G61- -2- or KS 2 -G66- -9-.

Fig 1: Component Location View From Inside From Right Cylinder Head

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove KS 3 -G198- -8- or KS 4 -G199- -1-.

Fig 2: Component Location View From Inside From Left Cylinder Head

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Installing

-- Attach the respective removed knock sensor in its installation location.

NOTE:

Tightening specifications affects function of KS.

-- Install the intake manifold.

Vehicles with aluminum intake manifolds, refer to INTAKE MANIFOLD .

Vehicles with plastic intake manifolds, refer to INTAKE MANIFOLD .

Tightening Specifications

Component		Nm
Knock sensor to cylinder block		20