Volkswagen Golf Service & Repair Manual: Removing and installing suction-jet pump
| On vehicles with four-wheel drive the fuel tank is divided
into a left and a right chamber. A suction-jet pump
-2- is used for delivering fuel
from the left fuel tank chamber to the baffle housing of the
fuel delivery unit -1- on the
right. |
| Function of suction-jet pump |
| The suction-jet pump operates according to the principle of
fluid entrainment: the stream of fuel from the electrical fuel
pump is passed through a nozzle in the suction-jet pump, and is
thus accelerated. The accelerated stream of fuel draws off the
surrounding fuel and delivers it to the baffle housing of the
fuel delivery unit. |
| Faults caused by defective suction-jet pump |
 Note
| Risk of breakdown due to defective suction-jet pump. |
| If the suction-jet pump is defective, the engine can stop
due to fuel starvation when the tank is still
1/4
full. |
| If the suction-jet pump does not work, approx. 15 litres of
fuel (1/4
of tank capacity) remain in the left chamber of the fuel tank
and cannot be extracted by the fuel delivery unit. |
| If the engine stops due to fuel starvation with the tank
filled up to about 1/4,
proceed as follows: |
| – |
Check fuel pump with → Vehicle
diagnostic tester. |
| If fuel pump is OK, but no fuel is delivered: |
| – |
Refill fuel tank with approx. 5 litres of fuel. |
| – |
The suction-jet pump cannot be renewed individually. Renew
fuel tank
→ Chapter. |
|
|
|
Special tools and workshop equipment
required
Removal wedge -3409-
Procedure:
...
Other materials:
Refrigerant R134a
Air conditioners in vehicles use the evaporation and
condensation process. The system contains a liquid with a low
boiling point, called the refrigerant.
The refrigerant used is tetrafluoroethane R134a, which boils
at -26.5°C with vapou ...
Tack cloth -VAS 6177
Designation:
Tack cloth -VAS 6177-
Product description:
Tack cloth with extremely effective soft tack properties for
critical cleaning tasks. Unlike other tack cloths, this cloth
does not lea ...
Safety precautions when working in the vicinity of high-voltage components
Danger to life due to high voltage
The high-voltage system is under high voltage. If high-voltage
components are damaged, there is a risk of severe or fatal injury due to
electric shock.
–
Perform visual check of high-voltage components and high-v ...
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Removing and installing fuel pump control unit -J538-