Removing and installing pump V50 (vehicles with 4-cyl. engine) — AUDI

🧭 Before you start

Fits: Audi A4 B9 (8W, 2015–)

Don't miss

• To stop coolant running into the engine compartment on detaching the coolant hoses.This illustration shows the arrangement with one pump only at the holder (D)For ease of illustration, the coolant hose (C) is shown disconnected.
• Mark the arrangement of the coolant hoses (B, C) at V50(A).

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Switch off the ignition.
2. ⚠ The cooling system is pressurised. When the engine is warm, the coolant temperature may be in excess of 90°C. Dissipate pressure and allow to cool down before performing repairs. Dissipate the pressure in the coolant circuit by opening the cap at the coolant expansion tank 19Cooling system/coolant; Draining and adding coolant — Dissipate the pressure in the coolant circuit by opening the cap on the coolant expansion tank.
3. Pinch off the coolant hoses (B, C) with hose clamps 3094 (or using commercially available pinch-off tools).
4. Cover the area beneath the connections for the coolant hoses (B, C) to V50(A) with absorbent paper for example. [Note: To stop coolant running into the engine compartment on detaching the coolant hoses.This illustration shows the arrangement with one pump only at the holder (D)For ease of illustration, the coolant hose (C) is shown disconnected.]
5. Mark the arrangement of the coolant hoses (B, C) at V50(A).

6. Unfasten the hose clamps (E) and detach the coolant hoses (B, C).
7. Remove the bolts (F, G) (tightening torque 7.5 Nm in each case). — 7.5 Nm (5.5 lb-ft)
8. Unplug the connector (F) at V50.
9. Unfasten the holder (C) from the vehicle and remove.
10. Unfasten the holder (C) from the vehicle and swivel carefully.
11. Unplug the connector (F).
12. Remove the bolts (D) (tightening torque 1.5 Nm). — 1.5 Nm (1.1 lb-ft)
13. Detach the pump V50(A) from the holder (C). [Note: If the coolant circuit has been drained, a new pump V50 is not to be started up until the coolant circuit has been filled, as dry running could destroy the new pump.As only a small quantity of coolant escapes from the coolant circuit on removing V50 as described above, coolant runs into V50 following installation and after removing the hose clamps (additionally open the coolant expansion tank cap) and there is no danger of dry running.]
14. Check the rubber bush (E) for correct positioning in the holder (C).
15. Fill the coolant circuit before plugging in the connector at V50.
16. Bleed the coolant circuit .

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