Assembly Instructions

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Tightening sequence for thrust-bearing screws

Fig 1: Tightening Sequence For Thrust-Bearing Screws

Courtesy of PORSCHE OF NORTH AMERICA, INC.

TIGHTENING TORQUES - BEARING HOUSING WITH CRANKSHAFT

Screws, bearing housing
Initial tightening:	20 Nm (15 ft.lb.)
Final tightening:	1 x 90° turn

REMOVAL AND INSTALLATION OF THRUST-BEARING SCREWS

No.

Designation

Qty.

Removal

Installation

1⁽¹⁾

Hexagon-head bolt M6 x 35

2⁽¹⁾

Guide rail

Check for wear marks and replace if necessary

3⁽¹⁾

Circlip

Replace; ensure correct seating

4⁽¹⁾

Washer

5⁽¹⁾

Tensioning rail

5a⁽¹⁾

Lining for tensioning rail

Unclip

Check for wear marks and replace if necessary

6⁽¹⁾

Intermediate shaft

7⁽¹⁾

Chain for intermediate shaft drive

8⁽¹⁾

Chain for camshaft drive of cylinder bank 1 - 3

9⁽¹⁾

Chain for camshaft drive of cylinder bank 4 - 6

10⁽¹⁾

O-ring 52 x 2.5

Always replace; do not fit twisted

11⁽¹⁾

Pan-head screw M6 x 16 (micro-encapsulated)

Replace

12⁽¹⁾

Gasket

13⁽¹⁾

Gasket

Ensure correct seating

14⁽¹⁾

Oil separator

Ensure correct seating

15⁽¹⁾

Bearing housing, completely preassembled

Assemble on assembly fixture 9607

⁽¹⁾	For explanation see Fig 1.

Fig 2: Identifying Timing Chain Components

Courtesy of PORSCHE OF NORTH AMERICA, INC.

CHECK PROCEDURE FOR BEARING HOUSING WITH CRANKSHAFT

No.	Procedure	Instructions
1	Checking sealing surfaces	Check both sealing surfaces of bearing housing for damage and cleanliness before installation in the bearing housing. Grind off sharp edges if necessary.
2	Checking flange bearing of intermediate shaft	Check flange for ease of movement or roughness of bearing; replace intermediate shaft if necessary.
3	Fitting O-ring	Carefully fit O-ring in the groove of the intermediate-shaft flange. Do not fit twisted. Grease lightly
4	Fitting chain for intermediate shaft	Put on chain between crankshaft drive sprocket and intermediate shaft drive sprocket. Fit guide rail and tensioning rail. After installation, turn intermediate shaft sprocket slightly by hand in clockwise direction and check whether there is sag in the upper chain area. Check chain installation if necessary.
5	Preparing intermediate shaft and crankshaft for installation	To facilitate assembly, connect the crankshaft and intermediate shaft with an O-ring before installing the complete bearing housing unit in the crankcase half (cylinder bank 1-3).