V8 FSI Engine

Power Steering Pump Delivery Pressure, Checking

Special tools, testers and auxiliary items required

• Hose clamps up to 25 mm diameter (3094)

• Power steering tester (V.A.G 1402)

• Adapter (V.A.G 1402/2)

• Hose from adapter set (V.A.G 1402/6)

• Torque Wrench 5-50 Nm (V.A.G 1331)

• Adapter (V.A.G 1402/4)

Test Prerequisites

• Sealing of system

• Hoses/lines are not kinked or constricted

Checking

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

• The check valve is in the return hose between the cambers - A arrows - or between hose clamps - B arrows -.







- Clamp the intake hose and the return line on the reservoir using (3094).






- Only remove front noise insulation - 1 -.






- Secure (V.A.G 1402) - 3 - with a cable tie - 2 - to stabilizer bar - 1 -.






- Remove banjo bolt - 6 -.






- Attach adapter as shown in figure.

1. (V.A.G 1402)

2. (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 Power steering test unit (V.A.G 1402).

- Install banjo bolt with new gaskets => [ (Item 14) Banjo Bolt ] Service and Repair. Note location of pressure line when doing so. Refer to => [ Pressure Line Location on 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.

- 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.