Audi Workshop Service and Repair Manuals

Master cooling circuit - connection diagram for coolant hoses

• Top coolant pipe
• ◆ Removing and installing=>Page 19-22
• Connection
• ◆ for thermostat
• ◆ Removing and installing thermostat => Page 19-19
• ◆ Checking => Page 19-21
• Coolant pump
• ◆ Removing and installing=>Page 19-17
• ◆ Check for smooth running
• EGR system cooler
• ◆ for vehicles with automatic gearbox
• ◆ Removing and installing=>Page 26-48

• Connection
• ◆ On vehicles with manual gearbox with glow plug coolant -Q7
• Heat exchanger for heater
• ◆ After replacing, fill with fresh coolant
• Vent hole
• ◆ In return pipe from heater heat exchanger
• Coolant pipe (bottom)
• ◆ Removing and installing=>Page 19-25
• Oil cooler
• ◆ Removing and installing => Item 17-7
• Cap
• ◆ With pressure relief valve
• ◆ Checking pressure relief valve
  => Page 19-47

• Expansion tank
• To fuel cooling circuit cooling element
• From fuel cooling circuit cooling
  element
• Cut-off valve for fuel cooling circuit-
• Radiator
• ◆ Removing and installing=>Page 19-40
• ◆ After replacing, fill with fresh coolant

Fuel cooling circuit -connection diagram for coolant hoses

• Cooler for fuel cooling circuit
• ◆ Removing and installing=>Page 19-62
• Pump for fuel cooling circuit -V166
• ◆ Checking => Page 19-51
• Coolant supply pipe
• ◆ To fuel cooling circuit pump
• Cooling element
• ◆ On fuel filter
• Expansion tank

• Cut-off valve for fuel cooling circuit
• Radiator
• ◆ Removing and installing=>Page 19-40
• ◆ After replacing, fill with fresh coolant
• Coolant pipe (top)
• ◆ Removing and installing=>Page 19-22
• Coolant return pipe
• ◆ From fuel cooling circuit cooler