Isuzu N-Series. Service manual — part 334
6A-78 ENGINE MECHANICAL
4HE1-TC
4HE1-TC engines use a larger rubber spacer than other
engines.
33. Generator Bracket
Tighten:
Generator bracket bolt to 48 N
⋅m (4.9 kg⋅m / 35 lb⋅ft)
34. Fan Belt Adjust Plate
Install the adjust plate and temporarily tighten the
adjust plate bolt.
35. Oil Cooler Assembly
1) Apply 2 — 3 mm (0.08 — 0.12 in) bead of the
recommended liquid gasket (Three Bond
1207C) or its equivalent on the oil cooler fitting
surface.
2) Apply a coat of engine oil to the O-rings (2 piec-
es) and install the O-rings to the oil cooler.
Legend
1. Cover
N6A0294E
N6A1642E
N6A0293E
N6A0292E
ENGINE MECHANICAL 6A-79
Notice:
Take care that the O-ring is not smeared with liquid gas-
ket.
• Install it within 7 minutes after application of liq-
uid gasket.
• For the dislocation of liquid gasket, refer to the
illustration.
3) Tighten the oil cooler bolts and nut to the spec-
ified torque a little at a time in the sequence
shown in the illustration.
Tighten:
Oil cooler bolt and nut to 24 N
⋅m (2.4 kg⋅m / 17 lb⋅ft)
36. Water Suction Pipe
1) Apply 2 — 3 mm (0.08 — 0.12 in) bead of the
recommended liquid gasket (Three Bond
1207C) or its equivalent on the groove of the
water suction pipe fitting surface.
2) Install the water suction pipe to the oil cooler.
• For the dislocation of liquid gasket, refer to the
illustration.
Tighten:
Water suction pipe bolt and nuts to 24 N
⋅m (2.4 kg⋅m /
17 lb
⋅ft)
Notice:
Install the water suction pipe immediately after the in-
stallation of the oil cooler.
37. Heater Pipe
1) Install the O-ring to the heater pipe.
2) Install the heater pipe to the oil cooler.
Legend
1. O-ring
2. Liquid gasket
N6A1626E
N6A0320E
Legend
1. Liquid gasket
N6A1627E
N6A0322E
6A-80 ENGINE MECHANICAL
Tighten:
Heater pipe bolt to 24 N
⋅m (2.4 kg⋅m / 17 lb⋅ft)
38. Idle Pulley Bracket (If equipped with A/C)
Tighten:
Idle pulley bracket bolt to 48 N
⋅m (4.9 kg⋅m / 35 lb⋅ft)
39. Injection Pump Rubber Spacer
Stick the rubber spacer to the location indicated in
the illustration with pressure sensitive adhesive
double coated tape.
40. Injection Pump Assembly (Except 4HF1-2)
1) Turn the crankshaft until the timing mark on the
crankshaft damper pulley is aligned with “13
°”
line.
Notice:
BTDC 13
° to be aligned with here is an angle at which
the injection pump is installed, and has nothing to do
with the injection timing.
2) Remove the inspection hole plug from the cyl-
inder body.
3) Install the O-ring to the injection pump bracket.
4) Align the injection pump bracket slit with the
timer slit.
5) Install the injection pump assembly to the cylin-
der body.
Notice:
When the injection pump has a poor gear engagement
while installing the assembly to the cylinder body, insert
a screwdriver into the slit on the timer peripheral with the
Legend
A. 4HF1-2
N6A0290E
N6A0289E
N6A0325E
N6A0326E
ENGINE MECHANICAL 6A-81
pump bracket slit used as a guide, and move it up and
down to get it into forcibly.
6) After installation of the injection pump, the in-
jection timing can be checked through the tim-
ing check hole provided to the injection pump
bracket.
Set the No.1 cylinder to BTDC (Injection timing
of each engine model) on the compression
stroke. When the pointer of the timing check
hole comes in line with the mark on the timer
periphery of the injection pump as shown in the
illustration, the injection timing is normal. After
completion of the injection timing check, tighten
the check hole plug to the specified torque.
7) Turn the crankshaft until the timing mark on the
crankshaft damper pulley is aligned with “8
°”
(98EPA) or “9
°” (Spec EURO3) line.
Notice:
Position in its normal rotating direction. (for 4HE1-TC
only)
Legend
1. Pointer
2. Timer outside mark
3. Timing check hole
N6A0327E
N6A0328E
Injection Timing
deg
4HF1
4HE1-TC (4HE1-XS,
XN)
BTDC 8
4HG1
BTDC 9
4HG1-T
BTDC 7 (Except Colombia)
BTDC 9 (For Colombia)
4HE1-TC (4HE1-XS)
BTDC 9 (Spec EURO3)
Legend
A. For 4HF1-TC
1. Timing check hole
2. 8
° Mark
3. 13
° Mark
4. Pointer
N6A0329E
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