Audi Q7: Heating, Ventilation & Air Conditioning

 Valve Stem Seals, Removing and Installing

Valve Stem Seals, Removing and Installing, Cylinder Head Installed Special tools and workshop equipment required Spark Plug Removal Tool -3122B- Puller - Valve Seal -3364- Seal Installer - Valve Stem -3365- Valve Keeper Tool Kit -VAS5161A- with the Valve Cotter Tool Kit - Guide Plate 19c -VAS

 Knock Sensor 1 - G61-, Checking

General Description The Knock Sensor 1 -G61- is a tuned accelerometer on the engine which converts engine vibration to an electrical signal. The Engine Control Module -J623- uses this signal to determine the presence of engine knock and to retard spark timing, if necessary. Special tools and wor