1998 OPEL FRONTERA Workshop Manual

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Page 5345 of 6000

OPEL FRONTERA 1998 Workshop Manual 6A – 72 ENGINE MECHANICAL
7) Apply plastigage to the crankshaft journal unit as
shown in the illustration.
8) Install the main bearing caps. Apply engine oil to
the bolt threads and the seats. Tight

Page 5346 of 6000

OPEL FRONTERA 1998 Workshop Manual ENGINE MECHANICAL 6A – 73
Crankshaft inspection
Inspect the surface of the crankshaft journals and crank
pins for excessive wear and damage.
Inspect the oil seal fitting surfaces for excessiv

Page 5347 of 6000

OPEL FRONTERA 1998 Workshop Manual 6A – 74 ENGINE MECHANICAL
Crankshaft Bearing Bore Grade Mark Position
Crankshaft bearing bore grade marks
1or 2are
stamped on the rear right hand side of the cylinder
body.
Example:
No

Page 5348 of 6000

OPEL FRONTERA 1998 Workshop Manual ENGINE MECHANICAL 6A – 75
Main Bearing Crankshaft
Bore Diameter mm(in) Main Journal Diameter mm(in)Crankshaft Oil Clearance
Grade Inside Diameter Grade Outside DiameterBearing mm(in)
1 or - 69.927

Page 5349 of 6000

OPEL FRONTERA 1998 Workshop Manual 6A – 76 ENGINE MECHANICAL
3. Piston and Connecting Rod Assembly
1) Apply engine oil to the cylinder bores, the
connecting rod bearings and the crankshaft pins
and each piston ring and piston.

6A – 76 ENGINE MECHANICAL
3. Piston and Connecting Rod Assembly
1) Apply engine oil to the cylinder bores, the
connecting rod bearings and the crankshaft pins
and each piston ring and piston.
2) Align the front mark (2) of piston and front mark
(3) of connecting rod then assemble them.
3) The N mark of the piston ring is faced toward the
top, check to see that the piston ring end gap is
correctly positioned.
Legend
(1) 1st piston ring end gap
(2) 2nd piston ring end gap
(3) Oil ring end gap4) Insert the piston/connecting rod assemblies into
each cylinder with the piston ring compressor.
The front marks must be facing the front of the
engine.
Piston Ring Compressor: 5-8840-9018-0
5) Match the numbered caps with the numbers on
the connecting rods. Align the punched marks
on the connecting rods and caps.
6) Apply engine oil to the threads and seating faces
of the nuts.
7) Tighten the cap nuts in 2 steps, using angular
tightening method as shown in the following
specifications.
1st step: 29 Nꞏm (3.0 kgꞏm/22 lb ft)
2nd step: 45°– 60°
After tightening the cap nuts, check to see that
the crankshaft rotates smoothly
4. Piston Cooling Oil Pipe
If the piston cooling oil pipe is forcibly assembled,
the end of the oil jet may bend. It could make it
impossible to supply oil to the piston cooling holes,
which will sometimes cause piston seizure.
Sufficient care should be taken to pipe assembly
work.
1) Tighten the bolt and oil jet plug to the specified
torque.
To r q u e :
M6: 8 Nꞏm (0.8 kgꞏm/6 lb ft)
M8: 20 Nꞏm (2.0 kgꞏm/14.5 lb ft)
Oiling Jet Plug: 30 Nꞏm (3.1 kgꞏm/22 lb ft)
5. Crank case
1) Refer to “Crank case” in this manual.
6. Apply liquid gasket (TB-1207C or equivalent) to
retainer then install it to rear end of cylinder block
within 5 minutes.
7. Crankshaft Rear Oil Seal
1) Tighten the adapter to the crankshaft rear and
section with 2 bolts.
2) Insert the oil seal into the peripheral section of
the adapter.
3) Insert the sleeve into the adapter and tighten it
with a bolt (M12 x 1.75L = 70) until the adapter
hits the sleeve.
4) Remove the adapter and the sleeve.
5) Check the dimension of the oil seal setting from
rear end of crankshaft.
Standard Dimension = 12.5 ± 0.3 mm
Oil Seal Installer: 5-8840-2359-0
2
3
1
015RW051
3
1
2
015RW083

Page 5350 of 6000

OPEL FRONTERA 1998 Workshop Manual ENGINE MECHANICAL 6A – 77
8. Cylinder Block Rear Plate (A/T)
Align the rear plate with the cylinder block dowel
pins.
Tighten the rear plate to the specified torque.
Torque: 97 Nꞏm (9.9 kg

Page 5351 of 6000

OPEL FRONTERA 1998 Workshop Manual 6A – 78 ENGINE MECHANICAL
2) Apply liquid gasket (TB1207B or equivalent)
between the cylinder block and the crankcase
fitting surfaces.
3) Install the timing gear case to the cylinder bod

Page 5352 of 6000

OPEL FRONTERA 1998 Workshop Manual 15. Crankshaft Front Oil Seal
1) Set oil seal with special tool.
2) Install front oil seal to timing gear case cover.
Crankshaft Front Oil Seal Installer: 5-8840-2061-0
3) Remove special tool and chec

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