Porshe 911 (997). Manual - part 34

Tightening sequence for gear carrier

8. Position 14 M9 x 127 thrust-bearing screws manually. Pre-tighten screws to the required

tightening torque in accordance with the tightening sequence. Then tighten to the required torque
angle. → Initial tightening: 11 ftlb. ; → Torque angle: 120 °

Dial gauge, crankshaft axial play

9. Check axial play of crankshaft. Fit dial gauge and dial gauge holder on gear carrier (flywheel side) and

place against crankshaft flange. Press crankshaft manually against probe of dial gauge and set dial gauge
to '0'. Press crankshaft away from dial gauge. Repeat process several times and note measured value.

Status

Tolerance range

Wear limit

First fitting

0.05 - 0.24 mm

0.28 mm

10. Insert connecting rod bearing in connecting rod and connecting rod cap. Coat sliding surface

with Optimol Optipit (available from Porsche Parts Service: 000.043.204.17).

Note

Connecting rod bolts must always be replaced.

11. Fit each of the connecting rods of cylinder 4-6 with the allocated connecting rod cap at the bearing

surfaces of cylinders 4, 5 and 6. Position new screws manually. Pay attention to the installation
position of the connecting rods:

 The recesses of the connecting-rod bearing twist lock face the oil pan

(when the gear carrier is installed in the crankcase).

Connecting rod bolts

12. First, screw in connecting rod bolts to the required torque and tighten to the specified torque angle.

Then loosen the bolts again. The final tightening is performed again with an initial tightening per
the torque and the final tightening is performed with the torque angle wrench. → Initial tightening:
15 ftlb.

 ; → Torque angle: 110 °

Diagnostic system: reading out fault memory and activating systems

Installing crankshaft

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Installing crankshaft, touching up

Installing crankshaft, touching up

1. Fit oil guide with new seals. Tighten six new M6 x 16 (micro-encapsulated) Torx screws. → Tightening

torque: 7.5 ftlb.

Note

Fix the intermediate shaft to the crankshaft using old O-rings, for example, to secure it.

2. Insert intermediate shaft with timing

chains.

Chain guide, intermediate shaft

3. Install tensioning rail and guide rail. Tighten three M6 x 40 hexagon-head bolts for guide rail -1- . Fit

tensioning rail -3- with new circlip and shim -2- . → Tightening torque: 7.5 ftlb.

4. Secure engine support 9589 engine assembly support.

5. Fit crankcase half 1-3 with two mounting parts 9590 to the engine support 9589. Check sealing face to

gear carrier for damage. Carefully clean sealing face with a clean cloth that has been soaked in solvent
naphtha or acetone.

Dowel sleeves for gear carrier in crankcase

Use only dowel sleeves whose dimension 'B' = 26.5 mm for fixing the gear carrier.

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Dowel sleeves, crankcase half 1-3

6. Check dowel sleeves to ensure that they are seated correctly or insert two new dowel sleeves in crankcase

-arrows-

 .

Seals for coolant ducts

7. Replace seals for coolant ducts -arrows- .

Gear carrier in crankcase half 1-3

Note

It is advisable to get a second person to assist in inserting the gear carrier into crankcase half 1-3.

8. Insert gear carrier in crankcase half 1-3 with retaining device.

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9. Screw in and tighten two additional screws for fastening the gear carrier to cylinder side 1-3,

replace O-ring. -arrows- . → Tightening torque: 16 ftlb.

Auxiliary screw with spacer sleeve 9613

10. Screw in and tighten another cylinder-head screw with spacer sleeve 9613 -arrow- on the belt

pulley side. → Tightening torque: 15 ftlb.

11. Unscrew special tool retaining device 9607 from gear carrier.

12. Install piston → 131020 Removing and installing pistons - "Installing" section.

997110, 997111, 997120, 997121, 997310, 997311, 997320, 997321, 997410, 997411, 997430, 997431,
997610, 997611, 997620, 997621

WARNUNG

Gefahr des Verlusts der Text-Bild-Zuordnung beim Ausdruck.

Aus technischen Gründen kann derzeit nicht ausgeschlossen werden, dass trotz
einwandfreier Darstellung auf dem Bildschirm beim Ausdruck der
Zusammenhang von Text und zugehörigem Bild verloren geht.

• 

Wird der Fehler nicht bemerkt, besteht die Gefahr, daß Arbeiten nicht korrekt
durchgeführt werden und es dadurch zu Personen- und Sachschäden kommt.

• 

→ Vergleichen Sie deshalb nach dem Druckvorgang unbedingt die Ausdrucke mit der
Bildschirmdarstellung. Korrigieren Sie die Ausdrucke im Fehlerfall so, daß der Inhalt der

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