Opel Frontera UBS. Service manual — part 404
4JG2-NA/4JG2-TURBO ENGINE 6A2 – 37
PISTON, PISTON RING AND CONNECTING ROD
REMOVAL
1.
Cylinder Head
•
Refer to “Cylinder Head” removal in this sec-
tion.
2.
Crankcase
•
Refer to “Crankcase” in this section.
3.
Connecting Rod Bearing Cap
•
Before removing the bearing cap, remove
carbon on the top of cylinder bore.
4.
Piston, Piston Rings and Connecting Rod
•
Push piston and connecting rod out from the
top of cylinder bore.
INSTALLATION
4.
Piston, Piston Rings and Connecting Rod
•
Apply engine oil to cylinder bore, connecting
rod bearings and crank pins.
•
In installing the piston, its front mark must face
the engine front side.
3.
Connecting Rod Bearing Cap
•
The bearing cap number must be same as
connecting rod number.
•
Apply engine oil to the thread and sealing
surface of each nuts.
•
Tighten nuts to the specified torque.
6A2 – 38 4JG2-NA/4JG2-TURBO ENGINE
•
After tightening the nuts, make sure that the
crankshaft rotates smoothly.
2.
Crankcase
•
Refer to “Crankcase” in this section.
1.
Cylinder Head
•
Refer to “Cylinder Head” installation in this sec-
tion.
1st step 29 (3.0/22) 2nd step 45° – 60°
N·m(Kg·m/lb·ft)
4JG2-NA/4JG2-TURBO ENGINE 6A2 – 39
CRANKSHAFT AND MAIN BEARING
6A2 – 40 4JG2-NA/4JG2-TURBO ENGINE
REMOVAL
1.
Engine Assembly
•
Refer to “Engine Assembly” removal in this
section.
2.
Crankshaft Damper Pulley
3.
Timing Gear Case Cover
4.
Oil Level Gauge and Guide Tube
5.
Idler Gear
“B” and Shaft
6.
Idler Gear
7.
Injection Pump
8.
Camshaft Timing Gear
9.
Crankcase
10. Gear Case
11. Flywheel
12. Rear Plate
13. Connecting Rod Caps
14. Crankshaft Main Bearing Caps
15. Crankshaft and Main Bearings
INSTALLATION
15. Crankshaft and Main Bearings
•
Install main bearings in the cylinder body and
main bearing cap respectively.
•
Apply new engine oil to upper and lower main
bearings.
•
Make sure that main bearing are in correct
position.
•
Install crankshaft with care.
•
Apply engine oil to the thrust washer.
•
Install thrust washer on No. 3 journal.
Oil grooves in thrust washer must face the
crankshaft.
14. Crankshaft Main Bearing Caps
•
Apply engine oil to the thread and seating surface
of each bearing cap fixing bolt.
•
Install bearing caps in the order of numbers,
starting with cylinder body front side.
•
Tighten main bearing fixing bolts to the specified
torque.
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