Assembly overview - high-pressure pump

1 -	Roller tappet

When installing lubricate lightly with clean engine oil

2 -

O-ring

Renew

When installing lubricate lightly with clean engine oil

3 -	High-pressure pump

With fuel pressure regulating valve -N276-.

Do not dismantle

Removing and installing → Chapter

4 -	High-pressure pipe

The fuel system is under high pressure.Risk of injury due to fuel which may spurt out.Release high pressure.

→ Chapter

Removing and installing → Chapter

Check for damage before re-installing.

Do not alter shape

Unions must not show any signs of damage

Lubricate thread of union nuts with clean engine oil

25 N·m

5 -

Bolt

Renew

Specified torque and tightening sequence → Fig.

6 -

Hose clip

7 -	Fuel supply line

8 -	Electrical connector

High-pressure pump - specified torque and sequence To prevent flange of high-pressure pump from being deformed during installation, install high-pressure pump as follows: Tighten bolts in stages as follows:

Stage	Bolts	Specified torque/ additional specified angle
1	-3-	Screw in to contact by hand
2	-3-	Tighten one turn alternately until flange of high-pressure pump makes contact with camshaft housing
3	-3-	20 N·m
4	-3-	Turn 90° further