Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 723

❑ If the connection was loosened, it must be replaced.

12 - Fuel Supply Line
13 - Spring Clamp

❑ Replace after removing

7.2

High Pressure Pump, Removing and In‐

stalling

Special tools and workshop equipment required
♦ Flare Nut Attachment - 17mm - T10456-

Caution

This procedure contains mandatory replaceable parts. Refer

to component overview prior to starting procedure.

Mandatory Replacement Parts
♦ Bolts - High Pressure Pump

Note

♦

Only remove the high pressure pump when the engine is cold.

♦

Pay attention when installing the high pressure pump, that no

dirt enters the fuel system.

♦

Collect escaping fuel with a rag.

♦

Inspect the O-ring for the high pressure pump, and replace it

if damaged.

♦

If the connection for the high pressure line -item 11-

⇒ Item 11 (page 327)

 was loosened, it must be replaced.

♦

Lubricate the high pressure line with engine oil and always

fasten them free of tension.

♦

Vehicles with the engine codes CNTA do not have an intake

manifold-fuel injector.

CAUTION

Fuel system is under high pressure.
Risk of injury from fuel spraying out.
– Reducing the fuel high pressure.

Removing
– Remove the engine cover. Refer to

⇒ “3.1 Engine Cover, Removing and Installing”, page 38

 .

– Remove the air filter housing -3-. Refer to

⇒ “3.2 Air Filter Housing, Removing and Installing”,

page 294

 .

– Free up the wiring harness -1 and 2- from the air guide pipe.
– Loosen the screw-type clamp -3-.
– Remove the bolts -arrows-.

– Loosen the hose clamp -arrow- and remove the left charge air

hose -1- with the air guide pipe downward.

– Release the retainers -arrow-, remove the wiring duct upward

from the bracket and move it towards the front.

– Remove the bolts -1, 2 and 3-.

– Remove the pipe clamp -arrow-.

– Loosen the union nut on the fuel rail -arrow- with the Flare Nut

Attachment - 17mm - T10456- .

– Counterhold on the hex fitting -A- and loosen the union nut

-arrow-. Remove the high pressure line.

– Disconnect the connector -1- from the Fuel Pressure Regula‐

tor Valve - N276- .

Vehicles with Intake-Manifold Fuel Injection

– Remove the fuel hose -3-.

For All Vehicles
– Remove the fuel hose -2-.
– Remove the bolts -arrows-.
– Carefully remove the high pressure pump. The roller tappet

can possibly remain in the vacuum pump.

Installing
– Replace the high pressure pump O-ring if damaged.
– Inspect the roller tappet for damages before installing and re‐

place if necessary.

– Insert the roller tappet into the vacuum pump as shown.

Note

♦

To insert the high pressure pump, the roller tappet must be at

its lowest point.

♦

If the connection for the high pressure line -item 11-

⇒ Item 11 (page 327)

 was loosened, it must be replaced.

– Rotate the crankshaft until the roller tappet is at the lowest

point.

– Insert the high pressure pump in the vacuum pump.

– Tighten the bolts -arrows- by hand in a diagonal sequence.
– Tighten the bolts diagonally to the tightening specification. For

the tightening specifications. Refer to

⇒ “7.1 Overview - High Pressure Pump”, page 325

 .

– Attach the fuel hoses -2 and 3- if equipped and secure with the

spring clamp.

– Connect the connector -1- to the Fuel Pressure Regulator

Valve - N276- .

– Coat the high pressure line ball with engine oil and install the

high pressure line. Tighten the union nut hand-tight and align

the high pressure line free of tension.

– Tighten the union nut on the fuel rail -arrow- with the Flare Nut

Attachment - 17mm - T10456- .

– Counterhold on the hex fitting -A- and tighten the union nut

-arrow-.