Opel Frontera UBS. Service 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.
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