Cooling System Bleeding

1996 Audi A4 Base, StandardSECTION Cooling System Bleeding
WARNING: This page is about a different car, the 1996 Audi Cabriolet and 1995 Audi Cabriolet. However, it is still accessible from the selected car via links, so may be relevant.
  1. Open heater hose bleed screw. See Fig 1. Open bleed screw on coolant pipe, next to coolant temperature sensor. See Fig 2. Fill cooling system through expansion tank until coolant comes out of vent holes. Tighten heater hose and coolant pipe bleed screws.
  2. Fill expansion tank to proper level. Install expansion tank cap. Start engine and raise engine speed to 2000 RPM for about 3 minutes. Ensure cooling fan operates. Return engine to idle. Check coolant level in expansion tank. Fill as necessary.
Fig 1: Locating Heater Hose Bleed Screw
G97B11941Courtesy of AUDI OF AMERICA, INC.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.