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W123 (1976-1985) W124 (1984-1995) W210 (1996-2002)
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  • E-Class
  • W124 (1984-1995)
  • Power unit
  • I4 petrol engine
  • Replacing the crankshaft sealing rings

Replacing the crankshaft sealing rings (Mercedes-Benz E-Class W124)

0
Contents: Front O-ring ↡ Rear O-ring ↡

Front O-ring



1. Remove the crankshaft pulley/vibration damper and hub.

2. Measure the installation depth of the front seal ring.

3. Drill two small holes in the sealing ring, located at diametrically opposite ends of the sealing ring. Screw two self-tapping screws into the drilled holes of the sealing ring and, using pliers, pull the sealing ring out by the screw heads.

4. Alternatively, you can pry the O-ring out using a screwdriver blade as a lever, but be careful not to damage the O-ring seat.

5. Check the condition of the spacer sleeve on the front side of the crankshaft and replace it if necessary.

6. Clean the sealing ring seat.

7. Dip the new sealing ring into clean engine oil and, using a tubular mandrel of the appropriate diameter, install the sealing ring into the seat to the required depth. Pre-cover the end of the spacer sleeve with adhesive tape to avoid damaging the working edges of the sealing ring during installation.

8. Remove the adhesive tape from the end of the spacer sleeve.

9. Install the crankshaft pulley/vibration damper and hub.

Rear O-ring



Rear crankshaft seal ring



A – factory installed ring;

A – factory installed ring;
B – ring installed during repair




1. Remove the flywheel/drive plate.

2. Measure the installation depth of the sealing ring.

3. Remove the rear O-ring using the same method as the front O-ring.

4. Check the condition of the crankshaft surface that contacts the sealing ring. If the crankshaft surface is worn, the crankshaft must be replaced.

5. Clean the sealing ring seat.

6. Dip a new sealing ring into clean engine oil and, using a tubular mandrel of the appropriate diameter, install the sealing ring into the seat to the required depth. Pre-cover the rear end of the crankshaft with adhesive tape to avoid damaging the working edges of the sealing ring during installation.

7. Remove the adhesive tape from the crankshaft.

8. Install the flywheel/drive plate.
This article is available at: russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
The article has been verified: Levin Kirill Glebovich
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E-Class W124 / I4 petrol engine
Next ▶

Flywheel/Drive Plate — Removal, Inspection and Installation
Oil pump — removal and installation
Oil pan — removal and installation
Cylinder head — removal and installation
Valve train, tappets and camshaft
Replacing the bearing at the end of the crankshaft
Checking and replacing the powertrain support
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W210 (1996-2002) 
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W124 (1984-1995) 
  • General information
  • Governing bodies
  • Driving and operation
  • Weekly care
  • Maintenance (gasoline)
  • Maintenance (diesel)
  • Troubleshooting
  • Power unit
  • I4 petrol engine
  • V6 petrol engine (SOHC)
  • V6 petrol engine (DOHC)
  • Diesel engines
  • Engine overhaul
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  • Supply system
  • Starting and charging system
  • Ignition system (I4)
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  • Preheating
  • Transmission
  • Clutch
  • Mechanical gearbox
  • Automatic gearbox
  • Drive shafts
  • Chassis
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  • Car suspension
  • Steering
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  • Switches
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W123 (1976-1985) 
  • General information
  • Introduction to the guide
  • Power unit
  • Engine device
  • Repair M102 engines
  • Repair M110 and M123 engines
  • Cooling and lubrication (M102)
  • Cooling (M110 and M123)
  • Ignition system
  • Power system «Stromberg»
  • Power system «Solex 4A1»
  • Fuel injection «K-Jetronic»
  • Fuel injection «L-Jetronic»
  • Transmission
  • Clutch
  • Mechanical gearbox
  • Automatic gearbox
  • Cardan and rear axle
  • Chassis
  • Front suspension
  • Rear suspension
  • Steering
  • Brake system
  • Body
  • Exterior (external elements)
  • Interior (internal elements)
  • Doors, locks and windows
  • Electrical equipment
  • Equipment and devices
  • Power devices
  • Electrical circuits
 
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