Function Of The Exhaust Gas Recirculation Radiator; Checking The Change-Over For Exhaust Gas Recirculation Radiator For Engines With Code Bkd; Azv - Skoda Octavia II 2004 Workshop Manual

Octavia II 2004 ➤ , Octavia II 2010 ➤
2.0/100; 103 kW TDI PD Engine - Edition 01.2018
– Disconnect vacuum hose from mechanical exhaust gas recir‐
culation valve -2-.
– Connect hand vacuum pump - VAS 6213- to valve.
– Slide the sliding ring -1- of the hand vacuum pump - VAS 6213-
in the -direction of arrow- for "vacuum".
– Create vacuum.
– Detach hose of hand vacuum pump from exhaust gas recir‐
culation valve.
• Closing of the valve should be clearly audible.
2.4 Function of the exhaust gas recircula‐
tion radiator
The exhaust gas recirculation system is fitted with a radiator
through which the coolant flows, in order to improve the exhaust
values.
The exhaust gas flowing back into the combustion chamber is
conducted via this radiator under certain conditions. The exhaust
gas temperature can therefore be reduced, which reduces the
combustion chamber temperature and improves the exhaust gas
values.
The exhaust gas recirculation radiator is switched on or off by the
engine control unit via the exhaust gas recirculation radiator
change-over valve - N345- . The electropneumatic change-over
valve opens or closes the vacuum ports to the vacuum actuator
of the radiator flap.
2.5 Checking the change-over for exhaust
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gas recirculation radiator for engines unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with code BKD, AZV
Special tools and workshop equipment required
♦ Hand vacuum pump , e.g. -VAS 6213 -
Test sequence
– Detach the vacuum hose from vacuum actuator -2- of the ex‐
haust gas recirculation radiator flap.
– Connect the hand vacuum pump - VAS 6213- to the vacuum
actuator.
– Slide the sliding ring -1- of the hand vacuum pump - VAS 6213-
in the -direction of arrow- for "vacuum".
– Create vacuum.
• The tension rod from the vacuum actuator of the exhaust gas
recirculation radiator flap must move smoothly.
If the tension rod does not move or moves jerkily:
♦ Defective vacuum actuator
♦ Stiff exhaust gas recirculation radiator flap
– Replace the exhaust gas recirculation radiator flap
⇒ page 245 .
244
Rep. gr.26 - Exhaust system
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�