Aligning the thermostat housing

1. Fit preassembled housing to crankcase and tighten hexagon head bolts lightly. Screw in oiled assembly pin 9262/1 manually, center and tighten hexagon head bolts crosswise. If a resistance is felt when the assembly pin is withdrawn, the fitting operation must be repeated.

2. Fit oil pressure release valve with new seal and oiled seals.

Tightening torque 45 Nm (33 ftlb).

Dismantling and assembling oil pressure release valve

Porsche 9262

No.

Designation

Removal

Installation

1

Slide valve housing

1

2

Thrust spring

1

3

Damping plunger

1

4

Slide plunger

1

5

O-ring

1

Replace, oil lightly

6

O-ring

1

Replace, oil lightly

7

Snap ring

1

May remain in slide valve housing

Check for correct seating

8

Seal A 20 x 24

1

Always to be replaced

9

Plug with grooved pin

1

Tightening torque 45 Nm (33 ftlb)

Assembly notes Note

Before dismantling the oil pressure release valve, use a suitable tool, e.g. a round wooden or plastic rod, to check if the slide plunger (4) slides smoothly in the slide valve housing (1). If it sticks or binds, the oil pressure release valve must not be fitted anymore.

Dismantling

1. Tighten oil pressure release valve at hexagon in a vise.

2. Put on protective gloves and pull slide housing out of plug.

Note

The slide valve housing (1) can only be pulled off with difficulty since the O-ring (5) must be destroyed in the process. In addition, the valve is spring-loaded.

Assembly

1. Oil O-ring (5) lightly and fit to slide housing.

2. Coat damping plunger (3) and slide plunger (4) with oil and preassemble them in the slide valve housing.

3. Grease slide valve housing (1) well in O-ring area, e.g. using Optimol Olit 2 EP or TL-VW 735.

4. Fit thrust spring (2), press slide valve housing into plug, using a vise and protecting the housing in a suitable manner (e.g. with a wooden or plastic block etc.).

5. Apply a thin oil coat to O-ring (6) and fit to slide valve housing.

Dismantling and assembling oil pressure release valve

Printed in Germany - IV, 1992

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