How to remove and refit the vacuum pump on 1991 Audi 100?

For 4-cylinder, Remove top cover, disconnect hose, undo clamp, withdraw pump, discard sealing ring, fit and oil new seal, align drive gear with shaft dog, refit clamp, hose, and cover. 5-cylinder: Remove top cover, disconnect hose, undo nuts, withdraw pump with pushrod, fit new seal, refit on studs, tighten, reconnect hose.

Genuine 1991 Audi 100 Vacuum Pump

Vacuum Pressure Pump

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1991 Audi 100 Vacuum Pump Part Number: 8L0-862-257-N
$921.86 MSRP: $1191.80
You Save: $269.94 (23%)
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Product Specifications
- Other Name: Pump; Vacuum Pump
- Item Weight: 2.40 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 8L0-862-257-N
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following 1991 Audi 100 Submodels:
- Base, CS, E, S | 5 Cyl 2.3 L GAS, 6 Cyl 2.8 L GAS

1991 Audi 100 Vacuum Pump Parts and Q&A

Q: How to remove and refit the vacuum pump on 1991 Audi 100?
A: For 4-cylinder, Remove top cover, disconnect hose, undo clamp, withdraw pump, discard sealing ring, fit and oil new seal, align drive gear with shaft dog, refit clamp, hose, and cover. 5-cylinder: Remove top cover, disconnect hose, undo nuts, withdraw pump with pushrod, fit new seal, refit on studs, tighten, reconnect hose.