STEP 1: Knock Sensor Installation

QUICK INFO:

The supplied sensor can be installed in different positions depending on the engine type, convenience and desired accuracy.

When possible, it is recommended to apply the 1st option that produces the most accurate knock detection. Although the

Plex Knock Monitor is compatible with many OEM knock sensors, using the supplied Bosch sensor will yield the most consistent results.

KNOCK SENSOR

CONNECTOR PIN OUT

white: knock signal

black: signal ground

ALTERNATE LOCATIONS FOR KNOCK SENSOR INSTALLATION

1. In the Center of the cylinder block (as used in OEM applications)

   - Good balance of knock signal pickup from all cylinders

   - Best signal to noise ratio

2. Front or back side of the cylinder block

  - Reduced sensitivity to one or more cylinders depending on position of sensor

  - Possible compromise of signal to noise ratio

3. Cylinder head

  - Reduced sensitivity to one or more cylinders depending on position of sensor

  - Noise pick up from valve train. Results in worst signal to noise ratio

4. Intake Manifold

   - Overall reduced sensitivity. In many cases it should be the second best position choice after the center of the cylinder block

SENSOR MOUNTING TIPS:

  - The contact surface should be flat machined and clean

  - Only the metal part of the sensor should be in contact with the surface

  - Recommended tightening torque is 20 ± 5 Nm

  - The sensor cable should be secured in a way to prevent vibrations