Porshe 911 (997). Manual - part 42

Boring the sealing ring

1. Make a 3-mm hole at the front of the sealing ring using an angle drill. Grease the drill in order to

bind the chips caused by drilling. Screw a sheetmetal screw with a washer approx. 5 mm into the
bore hole.

Levering out the sealing ring

ATTENTION

Ingress of dirt

Risk of engine damage.

• 

→ When working on the engine, absolute cleanliness is essential.

2. Position a lever tool on the sheetmetal screw, place a wooden wedge between the lever tool and the

crankcase and lever out the sealing ring. Carefully remove any residual dirt on the crankshaft flange.

ATTENTION

The crankshaft flange can be damaged if not cleaned correctly.

Leaks

• 

→ Never use an abrasive or polishing cloth or brushes with metal

bristles.

→ Follow cleaning instructions.

3. If there are corroded spots on the crankshaft flange, clean them off using a metal-polishing pad (e.g. Nevr

Dull, available in car and motor bike accessory stores). Then, carefully degrease the flange and crankcase
bore using a clean, lint-free cloth that has been soaked in solvent naphtha or acetone.

Diagnostic system: reading out fault memory and activating systems

Removing the crankshaft sealing ring - belt pulley side

325

Note

Perform a visual inspection of the crankshaft flange and crankcase bore for damage.

4. Check crankshaft flange and crankcase bore for damage.

Installing crankshaft sealing ring - belt pulley side

Installing crankshaft sealing ring - belt pulley side

Note

The standard shaft seal is pressed 12.5 mm in, measured from the end of the flange. The new sealing
ring is pressed 14.5 mm in using the special tool assembly sleeve 9610/1 in order to generate a new
running track.

• 

ATTENTION

Sharp tool edges and burrs.

Damage to the sealing lip.

• 

→ Always examine tools for signs of burrs and sharp

edges.

1. Small burred spots or damaged areas on the tools can be eliminated with a nail file, then pull off

with a fine abrasive or polishing cloth. Remove residual dirt on the tools, e.g. using solvent naphtha
or acetone.

Taper assembly sleeve, sealing ring

ATTENTION

Diagnostic system: reading out fault memory and activating systems

 Installing crankshaft sealing ring - belt pulley side

326

Grease on sealing ring can cause material damage

Damage to micro-sealing lip

• 

→ Do not oil or grease the crankshaft sealing ring

→ Only coat the crankshaft housing bore with new engine oil

2. Coat the crankshaft case bore with new engine oil and slide the new crankshaft sealing ring with the taper

of the assembly sleeve 9610/1 special tool over the crankshaft flange.

Insertion device for sealing ring

3. Fit sealing ring with the insertion device of the assembly sleeve 9610/1.

4. Check that the sealing ring is seated correctly. To do this, measure at four points, offset by 90°, from the

belt pulley attachment surface on the crankshaft flange to the sealing ring (outer radius). → Dimension:
14.5 mm

Subsequent work for crankshaft sealing ring - belt pulley side

Subsequent work for crankshaft sealing ring - belt pulley side

1. Install belt pulley or vibration damper → 137619 Removing and installing belt pulley - chapter

on "installing" [997120 997121 997320 997321 997430 997431 997620 997621]→ 137619
Removing and installing belt pulley - chapter on "installing" [997110 997111 997310 997311
997410 997411 997610 997611].

2. Position and tension drive belt → 137819 Removing and installing drive belt - chapter on

"installing".

3. Install air cleaner housing → 242519 Removing and installing air cleaner housing - chapter on

"installing".

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

Diagnostic system: reading out fault memory and activating systems

Installing crankshaft sealing ring - belt pulley side

327

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
Bildschirmdarstellung zutreffend wiedergegeben wird.

WARNING

Danger of losing text-figure correspondence when printing out.

For technical reasons, it can currently not be ruled out that the correspondence
between text and associated figure can be lost when it is printed out, even though
the display on the screen is correct.

• 

If the fault is not noticed, there is the danger that work will not be performed
correctly which can cause injury and damage.

• 

→ Therefore, always compare printouts with the screen display after printing them out. Correct
the printouts if they are faulty so that the content of the screen display matches that on the
printouts.

AVERTISSEMENT

Risque de perte de la correspondance texte-illustration lors de l'impression papier.

Pour des raisons techniques, il ne peut pas être exclu à l'heure actuelle que, même
en cas d'affichage correct à l'écran, la correspondance entre le texte et l'illustration
puisse être erronée sur l'impression papier.

• 

Si l'erreur passe inaperçue, on court le risque d'exécuter certaines opérations de
manière incorrecte pouvant conduire à des dommages corporels et matériels.

• 

→ Comparez impérativement pour cette raison les impressions papier avec l'affichage à l'écran.
Corrigez-les en cas d'erreur de manière à reproduire correctement l'affichage à l'écran.

ATTENZIONE

Pericolo di perdita dell'abbinamento testo-immagine nella stampa.

Per motivi tecnici non è escluso che, nonostante la rappresentazione sullo schermo

• 

Diagnostic system: reading out fault memory and activating systems

Subsequent work for crankshaft sealing ring - belt pulley side

328