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C4 (1990-1994) C4 (1990-1994, petrol) C3 (1982-1990) C3 (1982-1990, petrol) C3 (1982-1990, diesel)

Replacing crankshaft seals (Audi 100 C3)

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  • Audi 100
  • C3 (1982-1990)
  • Power unit
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  • Replacing crankshaft seals
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Table of contents: Front oil seal ↓ Rear oil seal ↓

Front oil seal



1. Remove the camshaft drive belt and crankshaft sprocket (see pp. 1–10 of subsection 3.1.2.9).

2. Unscrew the bolts securing the holder 6 of the oil seal (see Fig. Crankshaft and cylinder block). Remove the oil seal holder and gasket 7.

3. Remove the old seal 5 from the holder.

4. Press in a new seal, after lubricating it with engine oil.

5. Install the seal retainer back into place, replacing the gasket.

6. Tighten the bolts evenly diagonally to a torque of 20 N·m (2.0 kgf·m).

7. Install the crankshaft timing gear and camshaft drive belt.

Rear oil seal



1. Remove the flywheel (see pp. 1–2 of subsection 3.1.2.11).

2. Remove the rear oil seal holder with the oil seal and gasket

3. Remove the old seal from the holder and clean the area where it is installed.

4. Press in a new seal, after lubricating it with engine oil.

5. Install the seal retainer back into place, replacing the gasket.

6. Tighten the bolts evenly diagonally and tighten to a torque of 10 Nm (1.0 kgf·m).

7. Install the flywheel.

(The original article is posted on the resource «AudiManual.ru»)
The article was checked by auto expert Daniil Ushakov
This article is available at russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian

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Audi 100 C3: Engines 4-cylinder
Next articles

Removal and installation the flywheel
Camshaft drive
Clearances between camshaft lobes and valve lifters
Inspection, defect detection and repair of cylinder head parts
Removal and installation the oil pan
Removal, checking and installation the oil pump
Disassembling the connecting rod and piston group
Inspection and testing of connecting rod and piston group parts


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100(C4, 1990-1994) 
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100(C4, 1990-1994, petrol) 
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100(C3, 1982-1990) 
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100(C3, 1982-1990, petrol) 
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