Opel Frontera UBS. Manual - part 1285

4JG2-NA/4JG2-TURBO ENGINE 6A2 – 21

VALVE STEM OIL SEAL & VALVE SPRING

REMOVAL

Preparation

•

Disconnect battery ground cable.

1.

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

•

Disconnect air hoses.

•

Release clips and bands and remove air cleaner
cover.

2.

Intercooler Assembly (4JG2-T Only)

•

(Refer to intercooler removal steps in this section)

3.

Oil Level Gauge Tube

4.

Cylinder Head Cover

5.

Rocker Arm Shaft Assembly

•

Loosen bolts and nuts of rocker arm shaft

•

Bracket by turns and removal rocker

•

Shaft asm.

6.

Valve Spring

•

Apply compressed air to cylinder from the glow
plug hole hold the valve in place.

•

Using special tool, compress valve spring and
removal split collar.

Valve spring compressor:  9-8523-1423-0 (J-29760)

6A2 – 22 4JG2-NA/4JG2-TURBO ENGINE

CAUTION

•

Put removed valve springs in the order of cylinder
number.

7.

Valve Stem Oil Seal

•

Removal oil seal by pliers.

CAUTION

•

Removed oil controller should not be reused.

CAUTION

•

The painted area of the valve spring should be
facing toward.

•

Apply compressed air to cylinder from the glow
plug hole to hold the valve in place.

•

Install split collar by special tool.

Valve spring compressor: 9-8523-1423-0 (J-29760)

INSTALLATION

7.

Valve Stem Oil Seal

•

Install new oil seal to valve guide.

•

Guide using special tool.

Special tool: 5-8840-2033-0

6.

Valve Spring

•

Attach the valve spring to the upper spring seat.

5.

Rocker Arm Shaft Assembly

•

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

•

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

54 (5.5/40)

N·m(Kg·m/lb·ft)

4.

Cylinder Head Cover

•

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

13 (1.3/113)

N·m(Kg·m/lb·in)

4JG2-NA/4JG2-TURBO ENGINE 6A2 – 23

2.

Intercooler Assembly (4JG2-T Only)

•

Refer to intercooler installation steps in this
section.

1.

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

3.

Oil Level Gauge Guide Tube

•

Tighten guide tube to the specified torque.

19 (1.9/14)

N·m(Kg·m/lb·ft)

6A2 – 24 4JG2-NA/4JG2-TURBO ENGINE

ROCKER ARM SHAFT ASSEMBLY

REMOVAL

Preparation

•

Disconnect battery ground cable.

1.

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

•

Disconnect air hoses.

•

Release clips and bands and remove air cleaner
cover.

2.

Intercooler Assembly (4JG2-T Only)

•

Refer to intercooler removal steps in this section.

3.

Oil Level Gauge Tube

4.

Cylinder Head Cover

5.

Rocker Arm Shaft Assembly

•

Loosen bolts and nuts of rocker arm shaft bracket
by turns and remove rocker shaft asm.