Get Air conditioning system -> 1.5.5 Renewing air conditioner compressor due to leaks or internal damage Guide for Volkswagen Touran 4 Door Second Generation (2015-2022)

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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017

– Unscrew oil drain plug -B- / -D- from air conditioner compres‐

sor -A-.*

Note

♦ The design of the oil drain plug -B- / -D- and seal -C- / -E- may

vary (depending on the manufacturer of the air conditioner

compressor) ⇒ Heating, air conditioning; Rep. gr. 87 ; Air

conditioner compressor (vehicle-specific workshop manual).

♦ When installing the oil drain plug -B-/-D-, observe the corre‐

sponding torque specification (depending on the manufacturer

of the air conditioner compressor and the design of the oil drain

plug). Please note that the oil drain plug of air conditioner

compressors manufactured by Denso and Delphi is equipped

with an oil seal ⇒ Heating, Air conditioning; Rep. gr. 87 ; Air

conditioning compressor, Assembly overview - drive unit of air

conditioner compressor (currently valid specified torque:

30 Nm for “Denso” and 15 Nm for “Delphi” air conditioner com‐

pressor). The oil drain plug of air conditioner compressors

manufactured by “Sanden” and “Zexel- / Valeo” may be equip‐

ped with an O-ring or an oil seal (depending on the vehicle

equipment; currently valid specified torque: 10 Nm, respec‐

tively).

♦ On the Denso air conditioner compressor, for example, the oil

drain plug -D- has an oil seal -E-; renew ⇒ Heating, air con‐

ditioning; Rep. gr. 87 ; Air conditioner compressor (vehicle-

specific workshop manual) and ⇒ Electronic parts catalogue .

♦ On the Sanden air conditioner compressor, for example, the

oil drain plug -B- has a seal -C-; renew ⇒ Heating, air condi‐

tioning; Rep. gr. 87 ; Air conditioner compressor (vehicle-

specific workshop manual) and ⇒ Electronic parts catalogue .

♦ If a seal (oil seal or O-ring) fitted to the oil drain plug is not

available as a replacement part, the removed old part can be

reused (as an exception to the general rule of using new seals

only). The old seal, however, must always be checked for

damage prior to installation. If any damage or deformation is

detected on the old seal, it must be renewed with a commer‐

cially available new part.

♦ After filling the refrigerant circuit, check the installed oil drain

plug for leaks using e.g. an electronic leak detector.

♦ To speed up draining of the refrigerant oil, rotate the shaft of

the air conditioner compressor e.g. using the belt pulley or the

magnetic clutch pulley.

– Pour out old refrigerant oil from the air conditioner compressor

⇒ “1.5.4 Renewing air conditioner compressor with no need to

clean refrigerant circuit”, page 85 (disposal ⇒ VW / Audi

ServiceNet ).

1. Refrigerant circuit

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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017

All vehicles

Note

♦ Then pour new refrigerant oil in the air conditioner compressor

in a volume that equates to the refrigerant oil in the replace‐

ment compressor * ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigerant oil .

♦ Different refrigerant oil and volumes for different air condition‐

er compressors ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigerant oil .

♦ To ensure proper lubrication of the air conditioner compressor

when it runs for the first time, the air conditioner compressor

must be filled with at least 40 cm³of refrigerant oil; the re‐

mainder can be poured e.g. into the new reservoir or receiver

or a refrigerant line ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigerant oil .

♦ If dirt enters the air conditioner compressor whilst the refrig‐

erant circuit is open (e.g. after an accident), the air conditioner

compressor is to be renewed ⇒ Heating, air conditioning; Rep.

gr. 87 ; Air conditioner compressor .

♦ Clean the refrigerant circuit (flush with R1234yf refrigerant) *

⇒ “1.6 Cleaning refrigerant circuit”, page 92 .

– Renew desiccant cartridge and receiver ⇒ Heating, air con‐

ditioning; Rep. gr. 87 ; Refrigerant circuit; System overview -

refrigerant circuit .

– Assemble the refrigerant circuit, evacuate and refill

⇒ page 129 .

1.5.3

Renewing leaking or damaged compo‐

nents of charged refrigerant circuit

(apart from air conditioner compressor

and receiver)

There is still refrigerant in the refrigerant circuit (e.g. the leak is

small)

♦ Observe the general information about renewing components

⇒ “1.5.1 General information about renewing components”,

page 79

– Drain refrigerant circuit ⇒ page 129 .

– Remove the defective part, blow through with compressed air

and collect any escaping refrigerant oil.

–

The refrigerant oil that is blown out (plus 20 cm for the evap‐

orator, plus 10 cm for the condenser, refrigerant lines and

refrigerant hoses) should be poured into the new component

as fresh refrigerant oil.

Note

Dispose of old refrigerant oil (observing local regulations) ⇒ VW /

Audi ServiceNet .

– Assemble the refrigerant circuit, evacuate and charge

⇒ page 129 .

Rep. gr.87 - Air conditioning system

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Air conditioning system -> 1.5.5 Renewing air conditioner compressor due to leaks or internal damage for Your Volkswagen Touran 4 Door Second Generation (2015-2022)

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