Front Electric Drive Motor, Leak Test
Special tools and workshop equipment required
- Adapter :VAS 691 005/11-1
- Adapter :VAS 691 005/15-3
- Digital Pressure Sensor :V.A.G 1397B
- Cooling System Tester :V.A.G 1274B
- Sealing Cap :VAS 691 005/11-2
- Cooling System Tester - Directional Valve :VAS 691 005/1
Checking the tools in use for leaks
-- Connect the Cooling System Tester :V.A.G 1274B -D- on the Cooling System Tester - Directional Valve :VAS 691 005/1 -B-.
-- Connect the Digital Pressure Sensor :V.A.G 1397B -C- on the distribution piece -B-.
-- Open all shut-off valves -arrows- at the distribution piece -B-.
-- Connect the distribution piece -B- on the Leakage Test Set - Adapter :VAS 691 005/15-3 -E-.
-- Close the shut-off valve -arrow- at the adapter -E-.
-- Switch on the pressure sensor -C-. Select the unit "mbar" and relative pressure measurement "rEL".
-- Create pressure using the cooling system tester -D-.
Test pressure:
- 2000 mbar
-- When the pressure is reached, close the shut-off valve -arrow- at the distribution piece -B-.
Wait until the pressure stabilized.
-- Monitor the pressure sensor -C- for one minute.
Permitted pressure decrease:
- 0 mbar (0 psi)
Tip
Because of the high measuring exactness of the pressure sensor, the pressure displayed can vary.
Checking for leaks at the coolant side of the motor
-- Close the coolant connection -1- using the Sealing Cap :VAS 691 005/11-2 -H-.
-- Connect the Adapter :VAS 691 005/ 11-1 -I- to the coolant connector -2-.
-- Secure the cap and the adapter using a hose clamps -arrows-.
-- Connect the distribution piece -B- with the pressure sensor -C- and the pressure and cooling system tester -D- on the test adapter -I-.
-- Open all shut-off valves -arrows- at the distribution piece -B-.
-- Create pressure using the cooling system tester -D-.
Test pressure:
- 2000 mbar
-- When the pressure is reached, close the shut-off valve -arrow-.
Wait until the pressure stabilized.
-- Monitor the pressure sensor -C- for five minutes.
Permitted pressure decrease:
- 4 mbar (0.06 psi)
-- If the pressure falls by more than 4 mbar (0.06 psi), localize the leak using a commercially available leak detection spray.
Condition
- If leaks are located and sealed, repeat the leak test
- If no leaks are detected, remove all tools