Doosan G424FE - Cylinder Head

G424F(FE) Service Manual Chapter 3. Engine Mechanical System 78
Tighten
• Bolt: 18 – 28 N·m (13 – 20.5 lb·ft.)
26. With a 15-mm socket wrench and torque wrench,
tighten the nuts attaching the upper support to
the cylinder head.
Tighten
• Nuts: 25 – 30 N·m (18 – 22 lb·ft.)
27. Timing belt rear cover; see “Timing Belt Rear
Cover – Installation”, in this section.
28. Harness and hose supports and attaching bolt,
without tightening, to the intake manifold side.
29. With a 13-mm socket wrench and torque
wrench; tighten.
Tighten
• Bolt: 7 – 8 N·m (5 – 5,8 lb·ft)
30. Ground cable, to the camshaft case lower rear
area and attaching nut, without tightening.
31. With a Torx E12 wrench and torque wrench;
tighten.
Tighten
• Bolt: 18 – 22 N·m (13 – 16 lb·ft)
32. DIS coil together with the spark plug cables and
attaching bolt, attaching it with a 10-mm
combination wrench.
33. DIS coil electric connection.
34. MAP sensor electric connection.
35. Electric harness support to the intake manifold
front area and attaching bolt, without tightening.
36. With a 10-mm socket wrench, extension and
torque wrench; tighten.
Tighten
• Bolt: 7 – 8 N·m (5 – 5,8 lb·ft)
37. Radiator lower hose, with clamp, with special
clamp pliers.
38. Hose connecting the throttle valve body (mixer)
to the air cleaner, with its clamp.
39. Refill the cooling system.
40. Battery negative cable.
41. Change the engine oil, in view of possible water
contamination.
Cylinder Head
Removal
Remove or disconnect
1. Camshaft case assembly; see “Camshaft Case
Assembly – Removal”, in this section.
2. Intake manifold-to-cylinder head attaching bolts,
with a 13-mm socket wrench, extension and
handle.
3. Exhaust manifold-to-cylinder head attaching nuts,
with a 13-mm socket wrench, extension and
handle.
Clean
• Gasket residues from the exhaust and intake
manifolds, taking care not to scratch the gasket
mating surfaces.
Installation
Install or connect
1. A new exhaust manifold-to-cylinder head gasket.
2. Exhaust manifold to cylinder head and attaching
nuts, without tightening.
3. With a 13-mm socket wrench, extension and
torque wrench; tighten.
Tighten
• Nuts: 18 – 22 N·m (13 – 16 lb·ft.)
4. A new gasket between intake manifold and
cylinder head.
5. Intake manifold and attaching bolts, without
tightening.
Obs.: Do not install the last intake manifold lower
nut.
6. With a 13-mm wrench, extension and proper
torque wrench; tighten.