V6 FSI and TFSI Engines

Power Steering Pump Delivery Pressure, Checking

Special tools, testers and auxiliary items required

• Hose Clamps Up to 25 mm Dia. (3094)

• Torque Wrench 5-50 Nm (V.A.G 1331)

• Power Steering Test Unit (V.A.G 1402)

• Adapter (V.A.G 1402/2)

• Adapter (V.A.G 1402/4)

• Adapter Hose (V.A.G 1402/6)

Test Prerequisites

• Ribbed belt/ribbed belt tension OK

• Sealing of system

• Hoses/lines are not kinked or constricted

Checking

- Vehicles with air suspension, place vehicle on hoist. Refer to => [ Positioning Vehicle on Hoist and Wheels ] Positioning Vehicle on Hoist and Wheels.

• The (3094) must not be secured on return hose in check valve area. Otherwise, check valve will be damaged.

• The check valve is located in the return hose between the hose clamps - arrows -.

Check Valve in Return Hose





- Clamp the intake hose and the return line near the longitudinal member with hose clamps up to 25 mm diameter (3094).






- Only remove front noise insulation - 1 -.






- Remove banjo bolt - 6 -.






- Install (V.A.G 1402) as shown in illustration.

1. (V.A.G 1402)

2. Hose from (V.A.G 1402/6)

3. (V.A.G 1402/4)

4. Seal

5. Power steering pump

6. Banjo bolt

7. Pressurized line

8. (V.A.G 1402/2)


- Remove the (3094).

- Make sure that lever on pressure gauge stands in position - 2 -.






- Start engine and fill hydraulic fluid in reservoir if necessary.

- Turn steering wheel from stop to stop approximately 10 times.

• To avoid damage to pump, note the following:

• Pressure gauge shut-off valve must not remained closed longer than 10 seconds during this test.

• Start engine without giving gas and run at idle.

• Read the pump pressure immediately after starting at idle speed (have it read by a second technician, if necessary).

• Because pressure falls over the course of the test, the highest pressure shown is the decisive measurement.

- Now check delivery pressure.

- Start engine and when at idle speed, close shut-off valve - 1 - and read pressure (do not measure longer than 10 seconds).






Specification for Delivery Pressure: 110 to 128 bar

If specified value is not obtained, replace power steering pump. Refer to => [ Power Steering Pump ] Service and Repair.

- Turn off engine.

- Remove (V.A.G 1402).

- Install banjo bolt with new gaskets - item 7 - => [ (Item 7) Banjo Bolt ] Service and Repair. Note location of pressure line when doing so. Refer to => [ Power Steering Pump ] Service and Repair.

- Bleed steering system. Refer to => [ Steering System, Bleeding after Reinstalling ] Service and Repair.

- Check power steering fluid level. Refer to => [ Power Steering, Checking Hydraulic Oil Level ] Power Steering, Checking Hydraulic Oil Level.

- Check the steering system for leaks. Refer to => [ Steering System, Checking for Leaks ] Steering System, Checking For Leaks.

- Clean engine, engine compartment and subframe in power steering pump area.

- Install noise insulation..

- On vehicles with air suspension, position vehicle on wheels. Refer to => [ Positioning Vehicle on Hoist and Wheels ] Positioning Vehicle on Hoist and Wheels.