1998 NISSAN PICK-UP Repair Manual

Installation
1. Use a scraper to remove old liquid gasket from mating sur-
face of oil pan.
lAlso remove traces of liquid gasket from mating surface
of cylinder block.
2. Apply a continuous bead of liquid gasket to mating surface
of oil pan.
lUse Genuine Liquid Gasket or equivalent.
lApply to groove on mating surface.
lAllow 7 mm (0.28 in) clearance around bolt hole.
lBe sure liquid gasket diameter is 3.5 to 4.5 mm (0.138 to
0.177 in).
lAttaching should be done within 5 minutes after coating.
3. Install oil pan.
lTighten oil pan bolts in numerical order.
: 6.3 - 8.3 N´m (0.64 - 0.85 kg-m, 55.6 - 73.8 in-lb)
lWait at least 30 minutes before refilling engine oil.
4. Install parts in reverse order of removal.
SEM568F
SEM569F
SEM015E
SEM086E
SEM570F
OIL PANKA
EM-12

CAUTION:
lAfter removing timing chain, do not turn crankshaft and
camshaft separately, or valves will strike piston heads.
lWhen installing rocker arms, camshafts, chain
tensioner, oil seals, or other sliding parts, lubricate con-
tacting surfaces with new engine oil.
lApply new engine oil to bolt threads and seat surfaces
when installing cylinder head, camshaft sprockets,
crankshaft pulley, and camshaft brackets.
Removal
1. Disconnect battery terminal.
2. Remove air cleaner and air intake duct.
3. Drain coolant by removing cylinder block drain plug and
radiator drain cock.
4. Remove heater hose and radiator hoses.
5. Remove radiator with shroud and cooling fan.
6. Remove the following belts.
lPower steering drive belt
lCompressor drive belt
lAlternator drive belt
7. Remove accel control wire.
8. Disconnect exhaust manifold from exhaust front tube.
SEM571FA
TIMING CHAINKA
EM-13

9. Remove PCV hoses from rocker cover.
10. Remove alternator and bracket.
11. Remove power steering oil pump and bracket from engine.
12. Remove vacuum hoses, fuel hoses, wires, harness, connec-
tors and so on.
13. Remove all high tension wires.
14. Remove rocker cover.
lLoosen bolts in numerical order as shown in figure.
15. Remove all spark plugs.
16. Set No. 1 piston at TDC on its compression stroke.
17. Remove distributor.
Do not turn rotor with distributor removed.
18. Remove the following parts.
lPower steering pump, idler pulley and power steering pump
brackets
lCompressor idler pulley
lOil pump with pump drive spindle
SEM578F
SEM572F
SEM579F
SEM580F
TIMING CHAINKA
Removal (Cont'd)
EM-14

19. Remove crankshaft pulley damper.
20. Loosen crankshaft pulley bolt.
21. Remove crankshaft pulley with a suitable puller.
lRotate crankshaft until key way on camshaft sprocket is
in top position.
22. Remove camshaft sprockets bolt.
SEM583F
SEM584F
SEM585F
SEM586F
SEM587F
TIMING CHAINKA
Removal (Cont'd)
EM-15

23. Remove the bolt securing intake manifold to intake manifold
support.
24. Remove front timing cover to cylinder head bolts.
25. Remove cylinder head bolts.
lLoosen in numerical order.
lA warped or cracked cylinder head could result from
removing in incorrect order.
lLoosen cylinder head bolts in two or three steps.
26. Remove cylinder head with intake and exhaust manifolds.
27. Remove oil pan. (Refer to OIL PAN, EM-11.)
28. Remove front cover.
lInspect for oil leakage at front oil seal. Replace seal if oil leak
is present.
29. Remove the following parts.
lChain tensioner
lChain guides
lTiming chain and camshaft sprocket
lOil thrower, oil pump drive gear and crankshaft sprocket
SEM596F
SEM577F
SEM588F
SEM581F
SEM582F
TIMING CHAINKA
Removal (Cont'd)
EM-16

Inspection
lCheck for cracks and excessive wear at roller links.
Replace chain if necessary.
Installation
1. Install crankshaft sprocket, oil pump drive gear and oil
thrower.
lMake sure that mating marks on crankshaft sprocket
face front of engine.
2. Position crankshaft so that No. 1 piston is set at TDC (Key-
way at 12 o'clock) fit timing chain to crankshaft sprocket so
that mating mark is in line with mating mark on crankshaft
sprocket.
3. Temporarily install cylinder head with new gasket. Position
camshaft so that keyway is set at 12 o'clock.
lSet timing chain by aligning its mating marks with those
of crankshaft sprocket and camshaft sprocket.
SEM204C
SEM205C
SEM589F
TIMING CHAINKA
EM-17

4. Install timing chain and timing chain guides and chain ten-
sioner.
5. Before installing front cover, remove all traces of liquid gas-
ket from mating surface using a scraper.
lAlso remove traces of liquid gasket from mating surface
of cylinder block.
6. Apply a continuous bead of liquid gasket to front cover.
lUse Genuine Liquid Gasket or equivalent.
lBe sure to install new front oil seal in the right direction.
Refer to EM-22.
7. Apply lithium grease to sealing lip of crankshaft oil seal.
8. Install front cover.
lBe careful not to damage cylinder head gasket.
lBe careful not to damage front oil seal when installing
front cover.
9. Install oil pan. (Refer to OIL PAN, EM-11.)
10. Tighten cylinder head bolts.
VaTighten all bolts to 29 Nzm (3 kg-m, 22 ft-lb).
VbTighten all bolts to 78 Nzm (8 kg-m, 58 ft-lb).
VcLoosen all bolts completely.
VdTighten all bolts to 25 to 34 Nzm (2.5 to 3.5 kg-m, 18 to
25 ft-lb).
SEM590F
MEM194A
SEM440C
SEM573F
SEM594F
TIMING CHAINKA
Installation (Cont'd)
EM-18

VeMethod A: Turn all bolts 80+5
þ0degrees clockwise with
an angle wrench.
Method B: If an angle wrench is not available, tighten
all bolts to 74 to 83 N´m (7.5 to 8.5 kg-m, 54
to 61 ft-lb).
Tightening torque N´m (kg-m, ft-lb)
Va29 (3, 22)
Vb78 (8, 58)
Vc0 (0, 0)
Vd29 5 (3 0.5, 21.7 3.6)
Ve80+5
þ0degrees or
78 5 (8.0 0.5, 57.9 3.6)
11. Install camshaft sprockets.
Line up mating mark on timing chain with mating mark on
camshaft sprocket.
lLock camshafts as shown in figure and tighten to specified
torque.
: 137 - 157 N´m (14.0 - 16.0 kg-m, 101 - 116 ft-lb)
12. Install crankshaft pulley and crankshaft pulley damper.
SEM420EA
SEM421E
SEM591F
SEM592F
SEM593F
TIMING CHAINKA
Installation (Cont'd)
EM-19