NISSAN PATROL 1998 Y61 / 5.G Engine Mechanical User Guide
PATROL 1998 Y61 / 5.G
NISSAN
NISSAN
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NISSAN PATROL 1998 Y61 / 5.G Engine Mechanical User Guide
Trending: engine overheat, power steering, drain bolt, lock, oil pressure, oil temperature, alternator
Page 11 of 65
SEM781F
OUTER COMPONENT PARTS
EM-10
Page 12 of 65
Measurement of Compression Pressure
1. Warm up engine sufficiently.
2. Disconnect injection tube on nozzle side and loosen injection
tubes on pump side. Release clamps on injection tubes.
+Use two wrenches to prevent delivery holder on pump side
from loosening.
3. Remove spill-tube assembly.
+To prevent spill tube from breaking, remove it by gripping
nozzle holder.
4. Remove all injection nozzles using Tool or a suitable tool.
5. Turn ignition switch OFF and disconnect harness connector
(black colored) at injection pump.
SEM702B
SEM703B
SEM704B
SEM705B
SEM789F
COMPRESSION PRESSURE
EM-11
Page 13 of 65

6. Fit compression gauge adapter to cylinder head.
7. Crank engine and read gauge indication.
Crank speed: 200 rpm
Compression pressure:
Standard
3,040 kPa (30.4 bar, 31 kg/cm
2, 441 psi)
Limit
2,452 kPa (24.5 bar, 25 kg/cm
2, 356 psi)
Differential limit between cylinders
490 kPa (4.9 bar, 5 kg/cm
2, 71 psi)
8. If the pressure appears low, pour about 3 m!(0.11 Imp ¯ oz)
of engine oil through nozzle holes and repeat test.
For indications of test, refer to the following table.
Gauge indication during tests Trouble diagnosis
SEM857
+Piston rings are worn or
damaged.
SEM858
+If two adjacent cylinders
are low, gasket is dam-
aged.
+Valve is sticking.
+Valve seat or valve con-
tact surface is incorrected.
9. Replace nozzle gaskets and install injection nozzles.
New nozzle gasket installation direction is as shown.
Nozzle to cylinder head:
:59-69Nzm
(6.0 - 7.0 kg-m, 43 - 51 ft-lb)
SEM706B
SEM708B
COMPRESSION PRESSURE
Measurement of Compression Pressure
(Cont'd)
EM-12
First readingSecond
reading
Increased
reading
Same reading
maintained
Page 14 of 65
10. Install spill tube by holding nozzle holder.
Spill tube nut:
:39-49Nzm
(4 - 5 kg-m, 29 - 36 ft-lb)
11. Install injection tubes using two wrenches as shown.
Injection tube:
:22-25Nzm
(2.2 - 2.5 kg-m, 16 - 18 ft-lb)
12. Initialize the ECM.
Refer to EC section (``HOW TO ERASE DTC'').
SEM704B
SEM702B
SEM703B
COMPRESSION PRESSURE
Measurement of Compression Pressure
(Cont'd)
EM-13
Page 15 of 65
Removal
1. Remove oil pan guard.
2. Drain engine oil.
+When installing drain plug washer, ensure it faces in correct
direction.
+Discard oil drain plug washer and install a new one.
Drain plug:
:29-39Nzm (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
SEM782F
SEM783F
SEM063B
OIL PAN
EM-14
Page 16 of 65
3. Remove engine gussets and oil pan bolts.
+Remove bolts/nuts in numerical order shown in ®gure, alternat-
ing left and right ones toward the center.
4. Remove oil pump assembly.
Installation
Always install with new oil seal.
1. Install oil pump assembly.
Location Bolt length mm (in)
V120 (0.79)
V235 (1.38)
V345 (1.77)
V455 (2.17)
2. Install oil pan. Tighten bolts in the order shown in the ®gure.
+Always replace oil pan gaskets with new ones when reas-
sembling.
+Install oil pan gasket after cleaning the contacting surface.
+Oil pan bolts/nuts:
Bolt
:8-12Nzm (0.8 - 1.2 kg-m, 69 - 104 in-lb)
Nut
:10-14Nzm (1.0 - 1.4 kg-m, 87 - 122 in-lb)
3. Install engine gusset and oil pan guard.
SEM739B
SEM432C
SEM794F
SEM739BA
OIL PAN
Removal (Cont'd)
EM-15
Page 17 of 65
CAUTION:
+Do not bend or twist timing belt.
+After removing timing belt, do not turn crankshaft and
camshaft separately because valves will strike piston
heads.
+Make sure that timing belt, camshaft sprocket, crankshaft
sprocket, idler pulley, injection pump pulley and belt ten-
sioner are clean and free from oil and water.
+Align white lines on timing belt with punch mark on cam-
shaft sprocket, crankshaft sprocket and injection pump
pulley.
+Installation should be carried out when engine is cold.
Removal
1. Remove radiator shroud.
2. Remove the following belts.
+Power steering drive belt
+A/C compressor drive belt
+Alternator drive belt
3. Remove cooling fan coupling and water pump pulley.
SMA767BA
TIMING BELT
EM-16
Page 18 of 65
4. Set No. 1 cylinder at bottom dead center (BDC) on its expan-
sion stroke, as shown.
5. Remove the starter motor and wipe off the liquid gasket remain-
ing on the connecting part.
6. Install the ring gear stopper using the bolt holes for ®xing the
starter motor.
7. Remove crankshaft pulley using puller.
Be sure to securely attach puller jaws. Attach jaws only to the
rear side of pulley.
8. Remove front cover.
9. Remove tensioner spring and loosen belt tensioner lock nut.
10. Remove timing belt.
After removing timing belt, do not turn crankshaft and cam-
shaft separately, because valves will strike piston heads.
SMA768B
SMA769B
SMA770B
TIMING BELT
Removal (Cont'd)
EM-17
Page 19 of 65

Inspection
Visually check the condition of timing belt.
Replace if any abnormality is found.
Item to check Problem Cause
Tooth is broken/tooth root
is cracked.
SEM394A
+Camshaft jamming
+Distributor jamming
+Damaged camshaft/crankshaft oil seal
Back surface is cracked/
worn.
SEM395A
+Tensioner jamming
+Overheated engine
+Interference with belt cover
Side surface is worn.
+Belt corners are worn and round.
+Wicks are frayed and coming out.
SEM396A
+Improper installation of belt
+Malfunctioning crankshaft pulley plate/timing belt
plate
Teeth are worn.
+Canvas on tooth face is worn down.
+Canvas on tooth is ¯uffy, rubber layer is worn
down and faded white, or weft is worn down and
invisible.
SEM397A
+Poor belt cover sealing
+Coolant leakage at water pump
+Camshaft not functioning properly
+Distributor not functioning properly
+Excessive belt tension
Oil/Coolant or water is
stuck to belt. Ð+Poor oil sealing of each oil seal
+Coolant leakage at water pump
+Poor belt cover sealing
TIMING BELT
EM-18
Page 20 of 65
Installation
1. Con®rm that No. 1 cylinder is set at BDC on its expansion
stroke as follows:
Con®rm that crankshaft key is at the bottom.
2. Set timing belt.
a. Ensure timing belt, sprockets and pulleys are clean and
free from oil or water. Do not bend or twist timing belt too
much.
b. Align white lines on timing belt with matching mark on
camshaft sprocket, crankshaft sprocket and injection
pump pulley.
c. Point arrow on timing belt toward front.
SMA771B
TIMING BELT
EM-19
Trending: height adjustment, belt, dimensions, seats, alternator, remove seats, tow