Audi TT (2007 year). Manual - part 42

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

2.5

Checking oil pressure

Special tools and workshop equipment required
♦ Oil pressure tester -V.A.G 1342-

Procedure
• Oil level OK
• Engine oil temperature approx. 80 °C.
– Remove oil pressure switch -F1- 

⇒ page 156

 .

– Connect oil pressure tester -V.A.G 1342- to threaded hole for

oil pressure switch -F1- .

– Screw a used oil pressure switch into threaded hole on oil

pressure tester -V.A.G 1342- to seal hole.

– Start engine.
• Oil pressure at idling speed: at least 0.8 bar.
• Oil pressure at 2000 rpm: at least 2.0 bar.
– Install oil pressure switch -F1- 

⇒ page 156

 .

2.6

Engine oil

Refer to ⇒  Maintenance tables for engine oil capacity, oil speci‐

fications and viscosity grades.

2.7

Checking oil level

⇒ Maintenance ; Booklet  810

2. Oil filter bracket and engine oil cooler    

159

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

19 – Cooling

1

Cooling system

WARNING

Hot steam/hot coolant can escape - risk of scalding.

♦ The cooling system is under pressure when the engine is

hot.

♦ To allow pressure to dissipate, cover filler cap on coolant

expansion tank with cloth and open carefully.

Note

♦

Secure all hose connections with the correct type of hose clips

(same as original equipment) ⇒  Electronic parts catalogue .

♦

The arrow markings on coolant pipes and on ends of hoses

must align.

160

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

1.1

Diagram of coolant hose connections

Connection diagram for coolant hoses without 4/2-way valve:

1 - Radiator

❑ If renewed, refill system

with fresh coolant

2 - Pump for exhaust gas re‐

circulation cooler -V400-
3 - Engine oil cooler
4 - Radiator outlet coolant tem‐

perature sender -G83-

❑ Removing and installing

⇒ page 178

5 - Thermostat
6 - Coolant pump
7 - Cylinder head and cylinder

block

❑ If renewed, refill system

with fresh coolant

8 - Coolant expansion tank

❑ With filler cap
❑ Checking pressure re‐

lief valve in filler cap

⇒ page 196

9 - Exhaust gas recirculation

cooler

❑ If renewed, refill system

with fresh coolant

10 - Coolant temperature

sender -G62-

❑ Removing and installing

⇒ page 176

11 - Heat exchanger for heater

❑ If renewed, refill system

with fresh coolant

12 - Gear oil cooler

❑ For dual-clutch gearbox
❑ If renewed, refill system with fresh coolant

Connection diagram for coolant hoses with 4/2-way valve:

1. Cooling system    

161

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

1 - Radiator

❑ If renewed, refill system

with fresh coolant

2 - Pump for exhaust gas re‐

circulation cooler -V400-
3 - Engine oil cooler
4 - Radiator outlet coolant tem‐

perature sender -G83-

❑ Removing and installing

⇒ page 178

5 - 4/2-way valve with thermo‐

stat

❑ Removing and installing

⇒ page 173

6 - Coolant pump
7 - Cylinder head and cylinder

block

❑ If renewed, refill system

with fresh coolant

8 - Coolant expansion tank

❑ With filler cap
❑ Checking pressure re‐

lief valve in filler cap

⇒ page 196

9 - Exhaust gas recirculation

cooler

❑ If renewed, refill system

with fresh coolant

10 - Coolant temperature

sender -G62-

❑ Removing and installing

⇒ page 176

11 - Heat exchanger for heater

❑ If renewed, refill system with fresh coolant

12 - Gear oil cooler

❑ For dual-clutch gearbox
❑ If renewed, refill system with fresh coolant

162