135919 Removing and installing crankshaft sealing ring - flywheel side
WM 135919 Removing and installing crankshaft sealing ring - flywheel side
Tools
Technical values
Preliminary work for crankshaft sealing ring on flywheel side
Manual transmission:
1. Remove manual transmission -> 343519 Removing and installing transmission - section on "removing" 34351903 Removing and installing transmission.
2. Remove clutch -> 305019 Removing and installing clutch - section on "removing" 30501950 Removing and installing clutch.
3. Remove double-mass flywheel -> 136019 Removing and installing double-mass flywheel - section on "removing" Removal and Replacement.
Tiptronic:
4. Remove automatic transmission -> 373519 Removing and installing automatic transmission - section on "Removing" 37351900 Removing and installing automatic transmission.
5. Remove drive plate for converter -> 136319 Removing and installing drive plate for converter - section on "removing" Removal and Replacement.
Removing crankshaft sealing ring on flywheel side
Information
Visually inspect the crankshaft flange and crankcase bore for damage.
CAUTION
Risk of damage due to particles of dirt.
- Risk of engine damage.
-> Absolute cleanliness is essential when working on the engine.
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).
CAUTION
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.
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.
4. Drill crankshaft sealing ring at the punched position with a greased drill bit (dia. 3 mm) and carefully remove the swarf (e.g. with compressed air).
Boring the 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.
Pulling out sealing ring
6. Alternatively, screw a sheetmetal screw with washer approx. 5 mm into the bore.
7. Pull out sealing ring using puller 9237 at the tapping screw.
Pulling out sealing ring
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
New insert part assembly aid P 9699/2 for special tool insertion tool P 9699.
Insert part 9699/2
Component overview of insertion tool
Individual parts of insertion tool
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.
CAUTION
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.
3. Check crankshaft installation position. To do this, insert special tool measuring mandrel 9699/1 across the crankshaft flange into the fitted bore of the crankcase -figure-. The measuring mandrel must be placed with slight resistance in the bore. If the measuring mandrel cannot be positioned, the engine must be replaced.
Checking that crankshaft is centred using measuring mandrel 9699/1
4. Adjust insertion tool in order to position the supporting sleeve of the sealing ring. Unscrew the hexagon-head bolt until the groove of the assembly aid P 9699/2 is flush with the contact surface of the sleeve -arrow-.
Adjusting insertion part for positioning sealing ring
CAUTION
Damage to the sealing lip.
- Leaks
-> The crankshaft flange and tools must be perfectly clean and free of grease.
-> The sealing ring must be fitted dry, i.e. no oil, grease or other lubricants can be used.
-> The crankcase bore must not be oiled.
-> The sealing ring can only be positioned on the assembly tool using the supporting sleeve.
-> The new crankshaft sealing ring (PTFE) is supplied on a supporting sleeve as a spare part.
-> Do not remove the sealing ring from the supporting sleeve.
5. Slide new crankshaft sealing ring -1- with supporting sleeve onto the assembly aid P 9699/2 by pushing only on the sleeve -2-. The collar of the sleeve must point away from tool -inset-. Make sure sealing ring is dry.
Sliding PTFE sealing ring with supporting sleeve onto tool
6. Fit insertion tool 9699 between the two internal M8 pan-head screws, (hexagon socket a/f 8) on the crankshaft flange and fasten it. The crankshaft flange's dowel pin must sit in the bore of the device.
Fit insertion tool on crankshaft flange (shown with engine removed)
Information
After pulling in the sealing ring, leave assembly tool 9699 in place for about one minute so that the sealing lip can settle into position on the crankshaft flange.
7. To position the crankshaft sealing ring correctly on the crankshaft flange, turn at the hexagon (a/f 19) of the device in a clockwise direction as far as it will go -figure-. Let the tool in place for about one minute.
Inserting sealing ring using tool 9699
8. Remove tool. Loosen the large hexagon-head bolt and the two inner hexagon-head bolts alternately on the crankshaft flange until the tool can be removed.
9. Check whether the sealing ring is properly seated and aligned. To do this, measure at four points, offset by 90°, from the flywheel attachment surface on the crankshaft flange to the sealing ring (outer radius). => Dimension: 13 mm
10. Leave supporting sleeve on the tool following assembly to protect the edges of the tool. Carefully lift off the sleeve at the bore with a small screwdriver to remove it.
Support ring on insertion tool
Subsequent work for crankshaft sealing ring on flywheel side
Manual transmission:
1. Install double-mass flywheel -> 136019 Removing and installing double-mass flywheel - section on "installing" Removal and Replacement.
2. Install clutch -> 305019 Removing and installing clutch - section on "installing" 30501950 Removing and installing clutch.
3. Install manual transmission -> 343519 Removing and installing transmission - section on "installing" 34351903 Removing and installing transmission.
Tiptronic:
4. Install drive plate for converter -> 136319 Removing and installing drive plate for converter - section on "installing" Removal and Replacement.
5. Install automatic transmission -> 373519 Removing and installing automatic transmission - section on "Installing" 37351900 Removing and installing automatic transmission.