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Volkswagen Golf Service & Repair Manual: Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

Volkswagen Golf Service & Repair Manual / Fuel supply system - Petrol engines / Fuel supply, gas operation / Fuel tank / Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

Special tools and workshop equipment required
   
Torque wrench -V.A.G 1331-
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

Removal wedge -3409-
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

Engine and gearbox jack -V.A.G 1383 A-
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

Engine and gearbox jack -VAS 6931-
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

Torque wrench -V.A.G 1332-
Removing
–  Observe safety instructions → Chapter.
–  Observe rules for cleanliness → Chapter.
–  Move front seats to foremost position.
–  Switch off ignition.
–  Remove rear bench seat → General body repairs, interior; Rep. gr.72.
–  Draining fuel tank → Chapter
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Unclip cover -1- for flange at retaining tabs -arrows-, using removal wedge -3409-.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Unclip sealing grommet -1- downwards from cover -2-.
–  Push cover -2- back along wiring harness -3-.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Release and pull off connector -1- on sealing flange.
–  If fitted, detach connector -2- for metering pump -V54- of auxiliary heater on sealing flange and lay connector aside.
–  Release and pull off connector -2-.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Press up tab -2- in -direction of arrow A-; to do so, reach between floor panel and fuel tank with your finger.
–  At the same time, carefully pull fuel pump control unit -J538--1- out of mounting -in direction of arrow B- by grasping hold of wiring harness -3-.
–  Guide fuel pump control unit -J538- out towards interior between fuel tank and floor panel.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Open tank flap unit -2-.
–  Clean area around fuel filler neck.
–  Unscrew cap -1- for fuel filler neck.
  Note
In order to prevent the ingress of dirt, seal the opening of the fuel filler neck with a clean plug.
–  Remove tank flap unit -2- → General body repairs, exterior; Rep. gr.55.
–  Remove rear right wheel → Running gear, axles, steering; Rep. gr.44.
–  Remove rear right wheel housing liner → General body repairs, exterior; Rep. gr.66.
–  Remove rear underbody cladding → General body repairs, exterior; Rep. gr.66.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Unscrew bolts -1- and -2- for fuel filler neck.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Pull breather lines -1- and -2- off activated charcoal filter.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Release and pull off connector -arrow-.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Unclip wiring harness -1- from retainers -arrows-.
–  Remove rear section of exhaust system → Rep. gr.26.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Disconnect fuel line -1- on underbody. Separate plug-in connectors → Chapter.
The fuel system is pressurised.Risk of injury due to fuel which may spurt out.Wear eye protection.Wear protective gloves.Release pressure: place clean cloth around connection and carefully open connection.
–  Disconnect breather line -2-. Separate plug-in connectors → Chapter.
–  If rear underbody cladding is fitted, remove it → General body repairs, exterior; Rep. gr.66.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Push lever -2- on brake caliper in -direction of arrow-, and detach handbrake cable -1-.
–  Press together locking lugs -3-, and remove handbrake cable from bracket -4- on brake caliper.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Unclip handbrake cable -4- from retainer -arrow A-.
–  Pull handbrake cable out of guide -arrow B- on retainer -3-.
–  Unscrew bolts -2-, and swing trailing arm -1- downwards.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Remove bolt -4-.
–  Remove bracket for exhaust system.
–  Unscrew bolt -2- and remove securing strap.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Place engine and gearbox jack under fuel tank -1- to support it.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Unscrew bolts -1- and -3-.
  Note
For reasons of clarity, the fuel tank is shown without the engine and gearbox jack -V.A.G 1383 A-.
The aid of a 2nd mechanic is required to remove the fuel tank.
–  Lower fuel tank with engine and gearbox jack -V.A.G 1383 A-.
–  Lower fuel tank by turning it sideways.
–  Observe lines to activated charcoal filter (unclip them, if necessary).
–  Guide filler neck out between rear axle and body.
Installing
Install in reverse order. Observe the following:
–  Guide filler neck in between rear axle and body.
  Note
Separate plug-in connectors → Chapter.
–  If metering pump -V54- is fitted, ensure that it is securely fastened to bracket.
–  Make sure that the filler neck of the fuel tank is correctly inserted into the opening in the body.
–  Install breather and fuel lines free of kinks.
–  After installing fuel tank, check that the supply, return and breather lines are still clipped onto the fuel tank.
–  Position the fuel tank together with securing strap on underbody, using the engine and gearbox jack -V.A.G 1383 A-.
–  Make sure bracket for exhaust system is seated correctly → Rep. gr.26.
–  Note position of securing strap.
–  Ensure that line connections are tight.
–  Ensure connections are secured properly by pulling.
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

–  Check whether there are signs of oxidation on the earth wire of the connectors, remove if necessary.
–  Check installation position of earth connection.
Ensure that connector -2- is seated securely on metal ring -3-.
Contact tab -1- must be attached to fuel tank -4- and secured with spacer bush -5-.
–  Check contact of metal ring on fuel filler neck by measuring resistance between ring and bare metal on body using an ohmmeter.
Specification: approx. 0 ohm.
If the specification is not attained, there is a risk of explosion due to electrostatic discharge.
–  Fill fuel tank with at least 5 litres of fuel.
Risk of explosion of fuel tank caused by fuel pump activation.Risk of severe injuries and burns.If a new or completely empty fuel tank has been installed, fill it immediately with at least 5 litres of fuel.
Specified torques
→ Chapter „Assembly overview - fuel tank, vehicles with multi-link rear suspension“
→ General body repairs, interior; Rep. gr.72
→ Rep. gr.26
→ General body repairs, exterior; Rep. gr.55
→ General body repairs, exterior; Rep. gr.66
→ Running gear, axles, steering; Rep. gr.42
 

Removing and installing fuel tank, vehicles with multi-link rear suspension and fuel tank leakage diagnosis function

Assembly overview - fuel tank, vehicles with four-wheel drive
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