Engine - Coolant Temperature Sensor/Switch: Service and Repair
WM 197819 Removing and installing coolant temperature sensor
Tools
Technical values
Preliminary work
1. Raise the vehicle.
-> 4X00IN01 Lifting the vehicle.
2. Allow engine to cool down.
3. Place protective covers on the vehicle to avoid damaging the body and passenger compartment.
4. Place cooling-water collection pan underneath.
5. Remove air cleaner housing.
-> 242519 Removing and installing air cleaner housing - section on "Removing" Service and Repair.
Removing coolant temperature sensor
1. Remove crankcase vent line at the oil-filter housing.
Crankcase/vent line connection
1.1. Unscrew external Torx screw (E10, M6 x 20) -1- for the crankcase vent line on the oil-filter housing.
1.2. Release crankcase vent line -2- and pull it off the engine ventilation cover on the cylinder head.
1.3. Pull crankcase vent line -3- out of the oil-filter housing and lay it aside.
1.4. Check O-rings and replace them if necessary.
2. Remove coolant temperature sensor.
Coolant temperature sensor
2.1. Disconnect cable plug -4-.
2.2. Loosen and unscrew coolant temperature sensor -5- using the crow-foot wrench Nr.189-1.
Installing coolant temperature sensor
1. Replace sealing rings on crankcase vent line.
2. Install coolant temperature sensor.
Coolant temperature sensor
2.1. Fit coolant temperature sensor -5- and tighten it using the crow-foot wrench Nr.189-1.
=> Tightening torque: 30 Nm (22 ftlb.)-3 Nm (-2 ftlb.)
2.2. Connect cable plug -4-.
3. Install crankcase vent line at the oil-filter housing.
Crankcase/vent line connection
3.1. Grease and fit new O-rings with Kluber Syntheso Glep grease (Porsche Part No. 000.043.204.68).
3.2. Connect crankcase vent line -2-. The plug-in connector must lock with an audible click.
3.3. Guide crankcase vent line -3- into the oil-filter housing.
3.4. Screw in and tighten external Torx screw (M6 x 20) -1- on the vent line at the oil-filter housing.
=> Tightening torque: 10 Nm (7.5 ftlb.)
Subsequent work
1. Check the engine coolant level and top up if necessary.
-> 190101 Checking cooling system - section on "Checking" Testing and Inspection.
2. Install air cleaner housing.
-> 242519 Removing and installing air cleaner housing - section on "Installing" Service and Repair.