Volkswagen Touareg 2003 Workshop Repair Manual page 55

Test prerequisites
• Engine oil temperature must be at least 30°C.
• The battery voltage must be at least 11.5 V.
• All electrical consumers, e.g. lights and rear window heating,
must be switched off.
• If the vehicle is equipped with an air conditioner, it must be
switched off.
• The selector lever of the must be in „P"or „N" position.
Test procedure
– Remove ignition coils with output stages
– Disconnect all connectors from injectors.
– Remove spark plugs using spark plug socket and extension
-3122B- .
– Check compression using compression tester -V.A.G 1763- .
Note
Using compression tester ⇒ operating instructions .
– Have a second mechanic fully depress accelerator and crank
engine.
– Operate starter until tester shows no further pressure in‐
crease.
Compression pressures:
New: 10...15 bar
Wear limit: 7.0 bar.
Maximum permissible difference between all cylinders: 3 bar
– Insert spark plugs using spark plug socket and extension
-3122B- and tighten to 30 Nm.
After the test has been completed:
– Connect Vehicle diagnosis, testing and information system -
VAS 5052- .
– Carry out vehicle system test ⇒ Vehicle diagnostic tester „Gui‐
ded fault finding".
– Finish the vehicle system test so that any fault entries stored
during assembly can be deleted automatically.
– Generate the readiness code in combination with a road test.
Observe applicable safety precautions during road test.
– Carry out road test.
– Then carry out vehicle system test again and rectify any faults
which may have occurred.
8-cylinder injection engine - Edition 11.2011
⇒ page 158 .
Touareg 2003 ➤
49
1. Cylinder head