Porshe 911 (997). Manual - part 36

Remove manual transmission → 343519 Removing and installing transmission - chapter on
"removing" [997410 997411 997430 997431 997610 997611 997620 997621]→ 343519 Removing and
installing transmission - chapter on "removing" [997110 997111 997120 997121 997310 997311 997320
997321].

2. Remove clutch → 305019 Removing and installing clutch - chapter on

"removing".

3. Remove double-mass flywheel → 136019 Removing and installing double-mass flywheel - chapter on

"removing" [997110 997111 997310 997311 997410 997411 997610 997611]→ 136019 Removing and
installing double-mass flywheel - chapter on "removing" [997120 997121 997320 997321 997430 997431
997620 997621].

Tiptronic transmission

4. Remove engine → 100119 Removing and installing engine - chapter on

"removing".

5. Remove Tiptronic transmission → 373527 Removing and refitting automatic transmission - chapter on

"removing" [997110 997111 997120 997121 997310 997311 997320 997321]→ 373527 21 Removing and
refitting automatic transmission - chapter on "removing" [997410 997411 997430 997431 997610
997611 997620 997621].

6. Remove drive plate for converter → 136319 Removing and installing drive plate for converter - chapter on

"removing".

Removing crankshaft sealing ring on flywheel side

Removing crankshaft sealing ring on flywheel side

Note

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

ATTENTION

Ingress of dirt

Risk of engine damage.

• 

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

1. Carefully remove small edges or burrs on the chamfer of the crankshaft flange with an oilstone. Then,

carefully remove metal filings and any dirt remaining on the crankshaft journal and crankcase bore (using
a clean, lint-free cloth that has been soaked in solvent naphtha or acetone).

ATTENTION

The crankshaft flange can be damaged if not cleaned correctly.

Diagnostic system: reading out fault memory and activating systems

Preliminary work for crankshaft sealing ring on flywheel side

301

Leaks

• 

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

bristles.

→ Follow cleaning instructions.

2. 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 rub off the flange (using a clean,
lint-free cloth that has been soaked in solvent naphtha or acetone).

3. Punch the installed sealing ring at a depression (round window in the ring) with a drift punch (1

mm tip) NR.167

.

Boring the sealing ring

4. Drill crankshaft sealing ring at the punched position with a greased drill bit (ø 3 mm) and carefully

remove the swarf (e.g. with compressed air).

Pulling out sealing ring

5. Screw extractor tip of the tool puller, model G for sealing rings NR.168-1 into the bore on the sealing

ring and pull out the sealing ring.

6. Alternatively, screw a sheetmetal screw with washer approx. 5 mm into the bore.

Diagnostic system: reading out fault memory and activating systems

Removing crankshaft sealing ring on flywheel side

302

Pulling out sealing ring

7. Pull out sealing ring using puller 9237 at the tapping screw.

8. Check crankshaft flange and crankcase bore for damage.

9. If necessary, clean the crankshaft flange again using the metal-polishing pad. Then, carefully

degrease the flange and crankcase bore using a clean, lint-free cloth that has been soaked in
solvent naphtha or acetone. Ventilate this for at least three minutes to prevent the acetone vapours
from destroying the new sealing ring.

Installing crankshaft sealing ring on flywheel side

Installing crankshaft sealing ring (PTFE) on flywheel side

Insert part 9699/2

New insert part assembly aid P 9699/2 for special tool insertion tool P 9699.
Component overview of insertion tool

Diagnostic system: reading out fault memory and activating systems

 Installing crankshaft sealing ring on flywheel side

303

Individual parts of insertion tool

Item

Designation

Explanation

1

Screw

For pulling in the sealing ring

2

Sleeve

Body of insertion tool 9699

3

Guide pin

For guiding the insert part -5- into the sleeve.

4

Fastening screws

For securing the insertion tool on the crankshaft flange

5

Assembly aid P 9699/2

For fitting the PTFE sealing ring with supporting sleeve

1. Fit assembly aid P 9699/2 into the insertion tool P 9699. To do so, unscrew the hexagon-head bolt and

replace the insert parts.

ATTENTION

Sharp tool edges and burrs.

Damage to the sealing lip.

• 

→ Always examine tools for signs of burrs and sharp

edges.

2. Small burred spots or damaged areas on the tools can be eliminated with a nail file; then whet with

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

Diagnostic system: reading out fault memory and activating systems

Installing crankshaft sealing ring (PTFE) on flywheel side

304