Opel Frontera UBS. Manual - part 450

 

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Opel Frontera UBS. Manual - part 450

 

 

6A – 90 ENGINE MECHANICAL

5. Piston Ring

1) Install the piston rings with the piston ring

expander.
The compression ring must be set with the 1N,
2N mark facing up.

2) Discerning mark is stamped as shown in the

illustration (1).

Marked 1N: 1st compression ring

Marked 2N: 2nd compression ring

3) Install piston rings in the following sequence.

1) Oil ring

(1) After installing the expander ring then assemble

the oil ring.

2) 2nd compression ring

3) 1st compression ring

1) The compression ring must be set with the 1N or

2N mark facing up.

2) 1st compression ring:1N
3) 2nd compression ring: 2N
4) After installation, apply engine oil to the entire

circumference of the piston rings.
Check to see that all the rings rotate smoothly.

5) Insert the bearings into the connecting rods and

caps.
Apply new engine oil to the bearing faces.
Cap side bearings have no oil hole.
Connecting rod side bearing’s oil hole should be
aligned with oil hole on the connecting rod.

6. Piston and Connecting Rod

1) Apply engine oil to the cylinder bores, the

connecting rod bearings and the crankshaft
pins.

2) Check to see that the piston ring end gaps are

correctly positioned.

N

012RW037

2

3

1

015RW051

3

2

1

1

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ENGINE MECHANICAL 6A – 91

Legend

(1) 1st compressor ring gap
(2) 2nd compressor ring gap
(3) Oil ring gap

3) Insert the piston/connecting rod assemblies into

each cylinder with the piston ring compressor.

4) The front marks must be facing the front of the

engine.

Piston Ring Compressor : 5-8840-9018-0

7. Connecting Rod Bearing Cap

1) Apply engine oil to thread and seat of bearing

cap bolts.

2) Tighten the cap bolts in 2 steps, using angular

tightening method as shown in the following
specifications.

1st step: 29 N·m (3.0 kg·m/22 lb ft)
2nd step: 45°– 60°

After tightening the cap bolts, check to see that
the crankshaft rotates smoothly.

8. Crank Case Assembly

1) Refer to “Crank Case” in this manual.

9. Cylinder Head Assembly

1) Refer to “Cylinder head” in this manual.

3

1

2

015RW083

6A – 92 ENGINE MECHANICAL

CYLINDER BLOCK

1

15

14

13

8

11

16

17

10

9

7

2

12

3

4

6

5

18

012RW023

Legend

(1)

Cylinder Head

(2)

Cylinder Head Gasket

(3)

Flywheel

(4)

Cylinder Block Rear Plate (A/T) 
Flywheel Housing (M/T)

(5)

Crankshaft Rear Oil Seal

(6)

Retainer

(7)

Timing Gear Case Cover

(8)

Crankshaft Front Oil Seal

(9)

Timing Gear Case

(10)

Gasket

(11)

Balance Shaft

(12)

Crank Case

(13)

Piston Cooling Oil Pipe

(14)

Main Bearing Cap

(15)

Crankshaft

(16)

Crankshaft Timing Gear

(17)

Piston and Connecting Rod Assembly

(18)

Cylinder Block

ENGINE MECHANICAL 6A – 93

DISASSEMBLY

1. Cylinder Head Assembly

Refer to “Cylinder Head” in this manual.

2. Cylinder Head Gasket.
3. Flywheel
4. Cylinder Block Rear Plate (A/T), or Flywheel

housing (M/T).

5. Crankshaft Rear Oil Seal.

Install the special tool as shown in the illustration
and remove the oil seal.
Oil Seal Remover: 5-8840-2360-0

6. Retainer
7. Timing Gear Case Cover
8. Crankshaft Front Oil Seal

1) Use a plastic hammer and a screwdriver to tap

around the oil seal to free it from the gear case
cover.

9. Timing Gears

Refer to “Timing Gear” in this manual.

10. Timing gear case
11. Gasket
12. Balance shaft right
13. Crank case assembly
14. Piston cooling oil pipe
15. Piston assembly
16. Main bearing cap
17. Crankshaft assembly
18. Cylinder block side cover right and left
19. Cylinder block

INSPECTION AND REPAIR

Make the necessary adjustments, repairs, and part
replacements if excessive wear or damage is
discovered during inspection.

1. Remove the cylinder head gasket and any other

material adhering to the upper surface of the
cylinder block.
Be very careful not to allow any material to
accidentally drop into the cylinder block.
Be very careful not to scratch the cylinder block.

2. Carefully remove liquid gasket, which was used

when assembled, from gear case, rear oil seal
retainer and crank case.

3. Wipe the cylinder block clean and visually check it.
4. Use a straight edge and a feeler gauge to measure

the four sides and the two diagonals of the cylinder
block upper face.
If the measured values exceed the limit, the cylinder
block must be replaced.

Limit: 0.20 mm (0.0079 in)

015RV002

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