Volkswagen Golf Variant / Jetta. Manual - part 429

 

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Volkswagen Golf Variant / Jetta. Manual - part 429

 

 

Control Line to Turbocharger, Checking

Special tools and workshop equipment required
♦ Hand Vacuum Pump - VAS6213-

Caution

♦ When routing the vacuum lines, make sure they are not

kinked, twisted or pinched. They could disable the vehicle.

♦ Follow the safety precautions when working on the charge

air system and turbocharger. Refer to

⇒ “1 Safety Precautions when Working on Charge Air

System And Turbocharger”, page 268

 .

♦ Pay attention to the guidelines for clean working condi‐

tions. Refer to

⇒ “2 Guidelines for Clean Working Conditions”,

page 269

 .

Always pay attention to these instructions before and during

work.

– Remove the vacuum hose at the center connection of the

Wastegate Bypass Regulator Valve - N75- -item 2-

⇒ Item 2 (page 296)

 as well as at the turbocharger vacuum

diaphragm -item 1- 

⇒ Item 1 (page 296)

 .

– Seal an open end of the hose with a suitable blind plug.

Note

Do not use threaded bolts or pins.

– Connect the Hand Vacuum Pump - VAS6213- to the other end

of the hose and generate a vacuum of 0.6 bar (8.7 psi).

– Watch the pressure gauge on the Hand Vacuum Pump -

VAS6213- for approximately 30 seconds.

• The vacuum must not drop.
If vacuum drops:
– Replace the vacuum hose.
– Connect all the vacuum hoses.
– Install the engine cover. Refer to

⇒ “1.4 Engine Cover, Removing and Installing”, page 90

 .

If the vacuum does not decrease:
– Connect all the vacuum hoses.
– Install the engine cover. Refer to

⇒ “1.4 Engine Cover, Removing and Installing”, page 90

 .

4. Charge Air System    

299

Control Line to EGR Cooler Switch-Over

Vacuum Diaphragm, Checking, Engine

Codes CBDA, CBDB, CEGA

– Remove the hose at the center connection of the EGR Cooler

Switch-Over Valve - N345- -arrow-.

– Connect the Hand Vacuum Pump - VAS6213- to the removed

hose and generate a vacuum pressure of 0.6 bar (8.7 psi).

– Watch the pressure gauge on the hand vacuum pump for ap‐

proximately 30 seconds. The vacuum must not drop.

If the pressure drops:
– Remove the vacuum hose on the vacuum diaphragm for the

EGR cooler switch-over.

– Connect the Hand Vacuum Pump - VAS6213- with the sup‐

plied test hose to the vacuum diaphragm and create a pres‐

sure of 0.6 bar (8.7 psi).

Note

The adjusting travel of the vacuum diaphragm must be recog‐

nizable and the vacuum must not drop. If it is not, replace the

EGR cooler. Refer to

⇒ “4.1 Overview - Exhaust Gas Recirculation System Com‐

ponents”, page 403

 .

If a fault is not identified at the vacuum diaphragm, replace the

vacuum line on the EGR Cooler Switch-Over Valve - N345- .

Install the engine cover. Refer to

⇒ “1.4 Engine Cover, Removing and Installing”, page 90

 .

300

Special Tools

Special tools and workshop equipment required
♦ Torque Wrench 1331 5-50Nm - VAG1331-

♦ Turbo System Tester Kit - VAG1687-

♦ Hand Vacuum Pump - VAS6213-

♦ Hose Clip Pliers - VAS6362- or the Hose Clip Pliers -

VAS6340-

♦ Not Illustrated:
♦ Wrench - Open End - 14mm - T10461-

5. Special Tools    

301

302

 

 

 

 

 

 

 

Content   ..  427  428  429  430   ..