Opel Frontera UBS. Manual - part 378

SERVICE INFORMATION 00 – 35

Adjust the No. 1 or the No. 4 cylinder valve clearances while
their respective cylinders are at TDC on the compression
stroke.

0.4 (0.016)

mm(in)

Valve Clearance (At Cold)

4.

Loosen each valve clearance adjusting screw as shown
in the ilustration.

5.

Insert a feeler gauge of the appropriate thickness be-
tween the rocker arm and the valve stem end.

6.

Turn the valve clearance adjusting screw until a slight
drag can be felt on the feeler gauge.

7.

Tighten the lock nut securely.

8.

Rotate the crankshaft 360

°

.

9.

Realign the crankshaft damper pulley TDC notched line
with the timing pointer.

10. Adjust the clearances for the remaining valves as shown

in the illustration.

INJECTION TIMING ADJUSTMENT

1.

Set the No. 1 cylinder to Top Dead Center.

2.

Remove injector pump distributor head plug.

3.

Cancel Wax CSD with the handle of a screw driver.

4.

Fit a dial gauge and set lift to 1 mm.

5.

Set crankshaft damper pulley Top Dead Center mark
about 45

°

 before Top Dead Center from the pointer.

6.

Set dial gauge in the “O” position.

Measuring device : 5-8840-0145-0

7.

Turn the crankshaft a little rightwise and leftwise and
see it the pointer is stable in the “O” position.

8.

Turn the crankshaft in the normal direction and read the
measuring device’s indication at TDC (4JG2-T) or 1

°

ATDC (4JG2-NA).

9.

If the injection timing is outside the specified range,
continue with the following steps.

10. Loosen the injection pump fixing nuts and bracket bolts.
11. Adjust the injection pump setting angle.

•

If injection timing will be advanced, move the injec-
tion pump toward the engine.

•

If injection timing will be retarded, move the injec-
tion pump away from the engine.

Tighten the pump fixing nut, adjust bolt and pump distribu-
tor head plug to the specified torque.

19(1.9/13)

N·m(Kg·m/lb·ft)

Pump Fixing Bolt

0.5 (0.02)

mm(in)

Starting Timing

00 – 36 SERVICE INFORMATION

CAUTION

•

When installing the distributor head plug, be sure to use
new copper washer.

COMPRESSION PRESSURE MEASURE-
MENT

1.

Start the engine and allow it to idle until the coolant
temperature reaches 70 – 80

°

C (158 – 176

°

F).

2.

Remove the following parts.
*

Glow plugs

*

Fuel cut solenoid connector

*

QOS (Quick-On Start System) fusible link wire at the
connector.

3.

Set the adapter and compression gauge to the No. 1
cylinder glow plug hole.
Compression Gauge
(with Adapter):  5-8840-2675-0
Adapter:  5-8531-7002-0

5.

Repeat the procedure (Steps 3 and 4) for the remaining
cylinders.
If the measured value is less than the specified limit,
refer to “Troubleshooting” in this Manual.

17 (1.7/12)

N·m(Kg·m/lb·ft)

Injection Pump
Distributor Head Plug

4.

Turn the engine over with the starter motor and take the
compression gauge reading.

40(4.1/30)

N·m(Kg.m/lb·ft)

Adjust Bolt

Kpa (Kg/cm

2

 / Psi)

Standard

Limit

2940 (30/426)

2157 (22/313)

Compression Pressure at 200 rpm

SERVICE INFORMATION 00 – 37

3.

Measure the glow plug terminal voltage with a circuit
tester immediately after turning the starter switch to the
“ON” position.

8 – 9

V

Glow Plug Terminal Voltage

QUICK-ON START III SYSTEM

Quick-On Start System Inspection Procedure

1.

Disconnect the thermo-sensor connection on the ther-
mostat outlet pipe.

2.

Turn the starter switch to the “ON” position.
If the Quick-On Start III System is operating properly,
the glow relay will make a clicking sound within seven
seconds after the starter switch is turned on.

NOTE:

Electrical power to the quick-on start system will be cut
after the starter has remained in the “ON” position for ten
seconds.
Turn the starter switch to the “OFF” position and back to
the “ON” position.
This will reset the Quick-On Start III System.

Nut and Bolt Angular Tightening Method
(Using The Special Tool)

1.

Carefully wash the nuts and bolts to remove all oil and
grease.

2.

Apply engine oil to the threads and setting faces of the
nuts and bolts.

3.

Use a torque wrench to tighten the nuts and bolts to the
specified torque (snug torque).

4.

Attach the angle gauge to the socket wrench.
Angle Gauge: 5-88400-266-0

5.

Attach a magnet to some part to hold the angle gauge
stationary.

6.

Tighten the nuts and bolts to the specified angle, noting
the angle gauge indication.

00 – 38 SERVICE INFORMATION

FIXING TORQUE

CYLINDER HEAD COVER, CYLINDER HEAD ROCKER,
SHAFT BRAKER

N·m (Kg·m/lb·ft)