Dismantling and assembling the oil pump Note

If possible, dismantle and assemble the oil pump only in case of bearing damage

No.

Designation

Removal

Installation

1

Snap ring 13x1

1

Check for correct seating

2

Heaxagon nut

4

Use Loctite 270, tighten to 8 Nm (6 ftlb)

3

Washer

4

4

Housing

1

Separate with plastic mallet

5

Oil pump gears, long

2

Oil lightly

6

Oil pump gears, short

2

Oil lightly

7

Woodruff key

1

8

Housing

1

Separate with plastic mallet

9

Oil pump shaft I

1

Oil lightly

10

Oil pump shaft II

1

Oil lightly

11

Intermediate flange

12

Pin

2

If required, drive in flush and secure with bolt locking compound suitable for temperatures up to 160 deg. C

Note

If severe score marks are found, replace oil pump as a unit.

Replacing oil tank

2037-17

No.

Designation

Removal

Installation

1

Hose clamp

4

2

Union

1

2a

Oil hose

1

3

Lock nut M 6

2

4

Washer

2

5

Rubber-metal block

2

6

Flange nut

2

7

Cover panel

1

8

Flange nut

4

9

Sender for oil level gauge

1

10

Gasket

1

Replace

11

Hose clamp or tie-wrap

1

12

Molded hose

1

13

Pressure relief valve

1

Pull out with suitable pliers

Check, valve opening pressure must be 180 + 20 mbar, install with Loctite 574 sealant

14

Oil tank

1

1. Remove the hot-air blower on the left-hand side to the rear of the engine compartment.

2. Undo the fuel return line from the distributor while bracing. Catch escaping fuel.

88/439

Allow fuel to run into the measuring receptacle for 30 seconds. The delivered quantity must be at least 850 cm3/30s.

Checking the delivery rate of the fuel pump

1. Remove the hot-air blower on the left-hand side to the rear of the engine compartment.

2. Undo the fuel return line from the distributor while bracing. Catch escaping fuel.

88/439

Allow fuel to run into the measuring receptacle for 30 seconds. The delivered quantity must be at least 850 cm3/30s.

Precondition:

Fuel filter and power supply in prefect condition.

4. Disconnect the DEE relay from the central electric system and bridge terminals 30 and 87 b with a piece of cable.

88/500

3. Hold a test hose comprising:

1.5 m low-pressure hose and a 90° angled 10 mm hose stem with M 16 x 1.5 thread in a measuring receptacle.

911 Carrera 43 Fuel System, Electronic Injection

Checking the fuel pressure

No.

Description

Special Tool

Order number

Remarks

Pressure gauge with hose

P 378

000.721.378.00

from pressure tester

or

V.A.G 1318

Z 401 111 WE

Checking the fuel pressure

1. Remove the hot-air guide on the left-hand side to the rear of the engine compartment.

2. Unscrew and remove the cap nut from the test connection of the fuel distribution line.

Note

Make sure that the sealing ball does not fall out when the cap nut is removed.

3. Connect the dial gauge to the test connection with the hose from the pressure tester P 378 or VW 1318 .

Illustration shows engine removed. 88/460

4. Disconnect the DEE relay from the central electric system and bridge terminals 30 and 87 b with a piece of cable. The fuel pump must now run.

88/439

5. Checking specification:

Engine stationary 3.8 ± 0.2 bar (DEE relay bridged)

6. Turning torque for the cap nut 12 Nm (9 ftlb).

Checking the fuel pressure

Printed in Germany - VI, 1990

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