Porsche 928 S4 Technical Specifications

 

Torque Specifications

Engine M 28.21/22/43/44/45/46/41/42/47

 

Location

Tightening Method

Tightening Torque Nm

Thread

Main bearing bolt

1st stage

2nd stage

3rd stage

30

55

75 + 5

M 12 x 1.5

 

 

 

 

Main bearing bolt

1st stage

2nd stage

20

50 + 5

M 10

 

 

 

 

Oil pump bolt

1st stage

2nd stage

15

20

M 8

 

 

 

 

Conrod nut with ribbed surface

 

75

M 10 x 1.25

 

 

 

 

Cylinder head bolt with stud bolt

1st stage

2nd stage

3rd stage

4th stage

20

90° torquing angle

90° torquing angle

90° torquing angle

 

 

 

 

 

Cylinder head bolt with hexagon nut

1st stage

2nd stage

3rd stage

20

90° torquing angle

90° torquing angle

 

 

 

 

 

Camshaft bearing bridges to cylinder head

 

10

20

M 6

M 8

 

 

 

 

Camshaft housing to cylinder head

 

20

M 8

 

 

 

 

Screw plug to camshaft housing

 

40

M 18 x 1.5

 

 

 

 

Water drain plug radiator

 

1.5

M 10

 

 

 

 

Screw socket

 

 

 

on radiator

 

70

 

on engine

 

70

 

 

 

 

 

Oil hose to screw socket on upper section of crankcase

 

70

M 26 x 1.5

on radiator

 

70

M 26 x 1.5

 

 

 

 

Temperature switch radiator

 

40

 

 

 

 

 

Thermostat housing for cooling circuit to engine

1st stage

2nd stage

10

20 + 2

M 8

 

 

 

 

Remote thermometer sending unit – Water temperature

 

25 - 30

 

 

 

 

 

Non-return valve

 

55

 

 

 

 

 

Air line

 

30

 

 

 

 

 

Oxygen sensor

 

55

M 18 x 1.5

 

 

 

 

Screw plug exhaust removal at catalytic converter

 

15

M 8 x 1

 

 

 

 

Temperature sensor NTC II to thermostat housing

 

12

 

 

 

 

 

Allen screws for chain tensioner

 

10

M 6

 

 

 

 

Hollow-core screw/ chain tensioner

 

10

M 8 X 1

 

 

 

 

Non-return valve/ chain tensioner

 

15

M 10 X 1

 

 

 

 

Camshaft bolt

 

65

M 10 X 1.5

 

 

 

 

Cover for cylinder head

 

10

M 6

 

 

 

 

Spark plugs

 

25 bis 30

M 14 X 1.25

 

 

 

 

Flywheel bolt

1st stage

2nd stage

40

90

M 10 X 1.24

 

 

 

 

VEE-belt pulley attachment

 

295

M 18 X 1.5

 

 

 

 

Oil drain plug

 

50

M 20 X 1.5

 

 

 

 

Screw plug

Thermostat housing

 

80

M 48 X 1.5

 

 

 

 

Oil pressure sending unit

 

35

M 18 X 1.5

 

 

 

 

Screw plug

Pressure control valve

 

40

M 18 X 1.5

 

 

 

 

Screw connec. piece Bypass valve

 

70

M 24 X 1.5

 

 

 

 

Water drain plug – cylinder block

 

35

M 12 X 1.5

 

 

 

 

Knock sensor mounting

without washer

20

M 8

 

 

 

 

Intake manifold mounting

 

15

M 8

 

 

 

 

Hall sensor mounting

 

8

M 6

 

 

 

 

Mounting CO emission line to exhaust manifold

 

25

 

 

 

 

 

Cap nut to fuel distributing pipe

 

12

M 12 x 1.5

 

 

 

 

Union nuts to fuel distributing pipe

 

30

M16 x 1.5

 

 

 

 

All remaining bolts and nuts

 

 

 

M 6

M 8

M 10

 

8 + 2

20 + 2

40 + 5