Page 66 - E BOOK ENGINE MECHANICAL M2

4. SERVICE POINTS OF 4D56 ENGINE COMPONENT

5. Align the fuel injection pipe centre axis with the other
side components (fuel injector assembly and common
rail assembly) centre axis to install the fuel injection
pipe. Then, tighten the flare nut temporarily until the tip
of pipe (seal surface) contacts with the other side com-
ponents.

When the fuel injection pipe is installed, tighten the
Note flare nut while shaking the pipe lightly to align the
centre axis of both components.
6. Using special tool Fuel injection pipe wrench
(MB992188), install injection pipe assembly No.1 to
No.4. Tighten to the specified torque of 35 ± 5 Nm the
flare nuts of the fuel injection pipe No.1 to No.4 at injec-
tor side.

Fig. 4-13

7. Using special tool Fuel injection pipe wrench
(MB992188), install injection pipe assembly No.1 to
No.4. Tighten to the specified torque of 35 ± 5 Nm the
flare nuts of the fuel injection pipe No.1 to No.4 at com-
mon rail side.
8. Tighten the common rail to the specified torque of 24
± 4 Nm.
9. Tighten to the specified torque of 20 ± 2 Nm the eye
bolt and the fuel return gasket located at the common
rail side.
10. Tighten the fuel return pipe to the specified torque of
Fig. 4-14 10 ± 2 Nm.
11. Tighten to the specified torque of 10 ± 2 Nm the
bolts of the fuel injection pipe No.1 to No.4.

(5) Injector Installation
1. Clean the fuel injector assembly (nozzle) and the cyl-
inder head (fuel injector insertion hole) by following the
procedure below.

Fig. 4-15

4 - 5 Pub. No. PTAE1228