Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Knock Sensor: Service and Repair

Left Knock Sensor Location:




Right Knock Sensor Location:





CAUTION: Tknock sensor is installed into the engine block where it protrudes into a cooling passage. Engine coolant may be hot. It is a good practice to drain the coolant into a clean container, for storage and re-use, before servicing the knock sensor(s).

When replacing knock sensor, be sure threaded area of block and sensor is clean. DO NOT USE THREAD SEALER.

Tighten sensor to 19Nm (14 ft.lbs).