Volkswagen Golf 2004 Workshop Manual page 267

♦ Hot air blower from wiring harness repair set -VAS 1978-
Note
If the engine control unit is to be renewed, connect vehicle
♦
diagnostic, testing and information system -VAS 5051B- and
perform „Renewing engine control unit" in guided functions.
The shear-head bolt threads are coated with locking com‐
♦
pound. Heating the shear-head bolt with a hot air blower
releases the locking effect of the locking compound.
Removing:
– Switch off ignition.
– Remove wiper arms, plenum chamber cover and plenum bulk‐
head ⇒ Electrical system; Rep. gr. 92 ; Windscreen wiper
system; Removing and installing windscreen wiper system .
Caution
Cover lines, connections and control units in the vicinity of the
engine control unit to prevent damage through heat (scorching/
melting of plastics etc.).
Perform settings on hot air blower -4- as shown:
– Turn temperature settings potentiometer -2- to a maximum
heat output of 600 °C.
– Set two-stage switch for volume of air -3- to position 3.
WARNING
When shear-head bolts are heated up, parts of the protective
housing will be subjected to a large amount of heat. Wear pro‐
tective gloves to avoid possible injury.
– Place nozzle of hot air blower close to shear-head bolt.
– Switch on hot air blower and heat the bolts.
– Remove bolts with grip pliers .
Golf 2004 ➤ , Golf Plus 2005 ➤ , Passat 2006 ➤ , Touran 2003 ➤
4-cylinder diesel engine (2.0 l engine, 4 valve) - Edition 02.2011
2. Engine control unit (Golf)
261