seats NISSAN PATROL 2000 Electronic Repair Manual

1. Warm up engine.
2. Turn ignition switch OFF.
3.
Using CONSULT-II, make sure no error codes are indicated for
self-diagnosis items. Refer to EC section, ªFuel Pressure
Releaseº.
+Do not disconnect CONSULT-II until the end of this opera-
tion; it will be used to check engine rpm and for error detec-
tion at the end of this operation.
4. Disconnect the negative battery terminal.
5. Remove the following parts.
+Intercooler cover
+Intercooler
+Throttle body
+Rocker cover
6. To prevent fuel from being injected during inspection, remove
fuel injection pump fuse [ENG CONT (20A)] from fuse box on
the right side of engine compartment.
7. Remove glow plugs from all the cylinders.
+Before removal, clean the surrounding area to prevent
entry of any foreign materials into the engine.
+Carefully remove glow plugs to prevent any damage or
breakage.
+
Handle with care to avoid applying any shock to glow plugs.
8. Install adapter (SST) to installation holes of glow plugs and
connect compression gauge for diesel engine.
:15-19Nzm (1.5 - 2.0 kg-m, 11 - 14 ft-lb)
9. Connect battery negative terminal.
10. Set the ignition switch to ªSTARTº and crank. When gauge
pointer stabilizes, read compression pressure and engine
rpm. Repeat the above steps for each cylinder.
+Always use a fully-charged battery to obtain specified
engine speed.
Unit: kPa (bar, kg/cm2, psi)/rpm
Standard MinimumDifference limit between
cylinders
2,942 (29.42, 30.0, 427)/
2002,452 (24.52, 25.0, 356)/
200294 (2.94, 3.0, 43)/200
+When engine rpm is out of the specified range, check the
specific gravity of battery liquid. Measure again under cor-
rected conditions.
+If engine rpm exceeds the limit, check valve clearance and
combustion chamber components (valves, valve seats, cyl-
inder head gaskets, piston rings, pistons, cylinder bores, cyl-
inder block upper and lower surfaces) and measure again.
11. Complete this operation as follows:
a. Turn the ignition switch to ªOFFº.
b. Disconnect battery negative terminal.
c. Replace glow plug oil seals and install glow plugs.
d. Install fuel injection pump fuse [ENG CONT (20A)].
e. Connect battery negative terminal.
f. Using CONSULT-II make sure no error code is indicated for
items of self-diagnosis. Refer to EC section, ªTrouble Diag-
nosis Ð Indexº.
SEM318G
SEM334G
MEASUREMENT OF COMPRESSION PRESSURE
TROUBLESHOOTINGZD
EM-1010

VALVE OIL SEAL
1. Remove timing chain. Refer to EM-1027, ªTIMING CHAINº.
2. Remove injection nozzle assembly. Refer to ªInjection Tube
and Injection Nozzleº in ªBASIC SERVICE PROCEDUREº in
EC section.
3. Remove camshaft. Refer to EM-1031, ªCAMSHAFTº.
4. Remove valve lifters and mark order No. on each lifter.
5. Replace valve oil seal according to the following procedure.
When replacing valve oil seal, set the corresponding piston
at TDC. Failure to do so causes the valve to drop into the
cylinder.
1) Set No. 1 cylinder at TDC.
2) Remove valve springs and valve oil seals for No. 1 and No.
4 cylinders. Valve spring seats should not be removed.
3) Install new valve oil seals for No. 1 and No. 4 cylinders as
illustrated. Reinstall valve springs. (pink paint side toward
cylinder head)
4) Install valve spring retainers on intake valves and valve rota-
tors on exhaust valves, and remount valve assembly.
5) Set No. 2 cylinder at TDC.
6) Replace valve oil seals for No. 2 and No. 3 cylinders accord-
ing to steps 2) and 3).
7) Install valve lifters in original positions.
CRANKSHAFT OIL SEAL INSTALLING DIRECTION
AND MANNER
+When installing crankshaft oil seals, be careful to install
them correctly, as shown in the figure.
+Wipe off excess oil after installing oil seal.
SEM354G
SEM355G
SEM356G
SEM357G
SEM715A
OIL SEAL REPLACEMENTZD
EM-1051

5. Remove valve oil seals using valve oil seal puller (SST).
6. Remove valve spring seats.
7. Before removing valve spring seats, perform valve seat con-
tact check. (Refer to EM-1061.)
8. Before removing valve guides, perform valve guide clear-
ance check. (Refer to below.)
Inspection
CYLINDER HEAD DISTORTION
Using straightedge and feeler gauge, check the bottom of the
cylinder head for distortion.
Limit: 0.2 mm (0.008 in)
VALVE DIMENSION
Using micrometer, measure the dimensions of each part.
Standard
Unit: mm (in)
Intake valve Exhaust valve
L 113.5 (4.4685) 113.5 (4.4685)
T 1.5 (0.0591) 1.5 (0.0591)
fd6.962 - 6.977
(0.2741 - 0.2747)6.945 - 6.960
(0.2734 - 0.2740)
fD31.9 - 32.1
(1.2559 - 1.2638)29.9 - 30.1
(1.1772 - 1.1850)
a(degree) 45É00¢- 45É30¢45É00¢- 45É30¢
VALVE GUIDE CLEARANCE
+Perform the inspection before removing valve guides.
+Check that the valve stem diameter is within specifications.
+Push valve approximately 25 mm (0.98 in) toward combus-
tion chamber, move valve toward dial indicator to measure
valve movement.
+Valve guide clearance is 1/2 of movement on dial indicator.
FEM065
FEM066
FEM067
FEM068
CYLINDER HEADZD
Disassembly (Cont'd)
EM-1059

VALVE SEAT CONTACT
Check valve for any evidence of pitting at valve contact surface,
and reseat or replace if worn out excessively.
+When repairing valve seats, check valve and valve guide
for wear beforehand. If worn, replace them. Then correct
valve seat.
+The cutting should be done with both hands for uniform
cutting.
VALVE SEAT REPLACEMENT
+When removing valve seat, replace it with oversized [0.5 mm
(0.0020 in)] valve seat.
1. Cut valve seat to make it thin, and pull it out.
2. Machine cylinder head inner diameter at valve seat installa-
tion position.
Machining dimension:
Intake
33.500 - 33.515 mm (1.3189 - 1.3195 in) dia.
Exhaust
31.995 - 32.010 mm (1.2596 - 1.2602 in) dia.
3. Heat cylinder head to approximately 110 to 130ÉC (230 to
266ÉF) in oil bath.
4. After cooling valve seats sufficiently with dry ice, press fit it
to cylinder head.
CAUTION:
Do not touch the cooled valve seats directly by hand.
5. Using valve seat cutter (multi-purpose tool), finish process-
ing referring to the dimensions shown in the figure.
CAUTION:
When using valve seat cutter, grasp cutter handle with both
hands, press cutter onto contacting face all around, and cut
thoroughly. If cutter is pressed unevenly or repeatedly, the
valve seat surface may be damaged.
6. Using compound, perform valve fitting.
7. Check again to make sure that contacting status is satisfac-
tory.
FEM073
FEM074
FEM075
CYLINDER HEADZD
Inspection (Cont'd)
EM-1061

For details, Refer to EM-1088, ªValve Seatº in ªSERVICE DATA
AND SPECIFICATIONS (SDS)º.
VALVE SPRING RIGHT ANGLE
Position a straightedge to valve spring, turn the spring, and mea-
sure the maximum clearance value between top surface of
spring and the straightedge
Limit: 2.4 mm (0.0945 in)
VALVE SPRING FREE LENGTH AND COMPRESSIVE
LOAD
Using valve spring tester, check the following.
Free length: 55.43 mm (2.1823 in)
Installation height: 40.8 mm (1.6063 in)
Installation load: 180 - 206 N (18.4 - 21.0 kg, 40.6 -
46.3 lb)
Height at valve open: 32.3 mm (1.2717 in)
Load at valve open: 336 - 372 N (34.3 - 37.9 kg, 75.6 -
83.6 lb)
Assembly
1. Install valve guides, referring to EM-1061, ªVALVE SEAT
REPLACEMENTº.
2. Install valve seats, referring to EM-1061, ªVALVE SEAT
CONTACTº.
3. Using valve oil seal drift (SST), install valve oil seals refer-
ring to the dimension shown in the figure.
+The figure shows the dimension before valve spring seats
are installed.
4. Install valve spring seats.
5. Install valves.
+Install the valves with bigger openings to intake valve side.
+Note that valve layout here is different from that of conven-
tional the engine.
FEM076
FEM077
FEM078
FEM079
CYLINDER HEADZD
Inspection (Cont'd)
EM-1062