Opel Frontera UBS. Manual - part 1286

 

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Opel Frontera UBS. Manual - part 1286

 

 

4JG2-NA/4JG2-TURBO ENGINE 6A2 – 25

INSTALLATION

5.

Rocker Arm Shaft Assembly

Install  rocker arm shaft with larger oil hole (ø4) to
the front of engine.

Align fixing bolt with not of rocker arm shaft and
tighten fixing bolts to the specified torque.

54 (5.5/40)

N·m (kg·m/lb·ft)

Adjust valve clearance refreshing to section valve
clearance adjustment.

4.

Cylinder Head Cover

Install cylinder head cover and tighten bolts to the
specified torque.

3.

Oil Level Gauge Guide Tube

Tighten guide tube to the specified torque.

2.

Intercooler Assembly (4JG2-T Only)

Refer to intercooler installation steps in this
section.

1.

Air Cleaner Cover & Air Duct (4JG2-T Only)

13 (1.3/113)

N·m (kg·m/lb·in)

19 (1.9/14)

N·m (kg·m/lb·ft)

6A2 – 26 4JG2-NA/4JG2-TURBO ENGINE

CYLINDER HEAD

4JG2-NA/4JG2-TURBO ENGINE 6A 2– 27

REMOVAL

Preparation

Remove battery.  (two batteries for cold area)

Disconnect window washer hose, and remove
engine hood.

Drain coolant.

Space stand and front right tire.

1.

Radiator Hose : Upper

Disconnect upper radiator hose from engine side.

2.

Air Cleaner Cover & Air Duct

3.

Intercooler Assembly (4JG2-T Only)

(Refer to intercooler removal steps in this section)

4.

Oil Level Gauge Guide Tube

5.

P/S Pump

Loosen P/S pump fixing bolts and adjusting bolt
and remove two drive belts.

Remove two fixing bolts (front side).  A fixing nut
(rear side) and support P/S pump asm with oil
hoses by tying to body side.

6.

A/C Compressor Assembly

Remove A/C compressor fixing bolt (rear under
side of compressor) by using a long extension bar
at under side of wheel arch.

Disconnect magnetic clutch harness connector.

Remove fixing bolts (upper and front lower side of
compressor) and set A/C compressor asm with
pipe line on battery carrier.

7.

Water Hose; CSD

Disconnect CSD water hoses from heater hose
side.

8.

Engine Harness

Disconnect five harness connectors from units on
thermostat housing.

9.

Heater Hose: Rear Side

Disconnect heater hose from heater pipe.

10. Water Bypass Hose

Disconnect water bypass hose from water pump.

11. Water Inlet Hose: Turbo (4JG2-T Only)

Disconnect from water outlet pipe of engine.

12 Water Outlet Hose: Turbo (4JG2-T Only)

Disconnect from water inlet pipe of engine.

13 Oil Feed Pipe: Turbo (4JG2-T Only)

Remove two joint bolts (from turbocharger and
cylinder block) and oil feed pipe.

14. Oil Return Pipe Fixing Nut (4JG2-T Only)

Remove oil return pipe fixing nut from cylinder
block.

15. Oil Cooler Hose

6A2 – 28 4JG2-NA/4JG2-TURBO ENGINE

16. Exh. Manifold; W/turbo (4JG2-T Only)

Remove exh. manifold bracket fixing bolt from
exh. manifold.

Remove exh. manifold fixing bolts and nuts from
cylinder head.

After pulling out exh. manifold a little, remove oil
return pipe flange from stud bolt and remove exh.
manifold w/turbo.

17. Front Exhaust Pipe
18. Fuel Leak Off Hose
19. Cylinder Head Cover
20. Glow Plug Harness
21. Injection Pipe

Loosen sleeve nuts on injection pump side.

Disconnect sleeve nuts on injection pipe.

22. Fuel Leak Off Pipe
23. Rocker Arm Shaft Assembly
24. Push Rod
25. Cylinder Head W/inlet Manifold

Disconnect cylinder head bolts in sequence shown
in Figure.

26. Cylinder Head Gasket

INSTALLATION

26. Cylinder Head Gasket

Determine cylinder head gasket grade by
measuring projection of piston head.

Install dowel in cylinder block.

Install cylinder head gasket with top mark up.

25. Cylinder Head W/intake Manifold

Clean up cylinder head lower surface and cylinder
body upper surface.

Install cylinder head as softly.

Apply engine oil to screw and seat of cylinder
head bolts.

Tighten cylinder head bolts in following sequence.

24. Push Rod

Inspect curvature, excessive wear and damage.
(Refer to push rod inspection)

1st Step

N·m (kg·m/lb·ft)

49 (5.0/36)

2nd Step

60°

3rd Step

60°

 

 

 

 

 

 

 

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