Nissan Altima L32. Instruction — part 632
EM-64
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CYLINDER HEAD
CYLINDER HEAD
Removal and Installation
INFOID:0000000004202130
REMOVAL
1. Remove the engine and transaxle assembly. Refer to
EM-72, "Removal and Installation"
.
2. Remove the timing chain. Refer to
EM-52, "Removal and Installation"
3. Remove the camshafts. Refer to
.
4. Remove spark plugs. Refer to
EM-14, "Removal and Installation"
5. Remove the exhaust manifold and three way catalyst. Refer to
EM-30, "Removal and Installation"
6. Remove cylinder head loosening bolts in the order as shown,
using power tool.
7. If necessary to transfer to new cylinder head or remove for
reconditioning, remove the intake manifold collector, intake man-
ifold, and fuel tube assembly. Refer to
INSPECTION AFTER REMOVAL
Outer Diameter of Cylinder Head Bolts
• Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between
d1 and d2 exceeds the limit, replace the bolts with new ones.
AWBIA0066ZZ
1.
Cylinder head
2.
Cylinder head gasket
3.
Cylinder head bolt
A.
Follow installation procedure
WBIA0033E
CYLINDER HEAD
EM-65
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• If reduction of outer diameter appears in a position other than d2,
use it as d2 point.
INSTALLATION
1. Install a new cylinder head gasket.
2. Install the cylinder head.
3. Follow the steps below to tighten the cylinder head bolts in the numerical order as shown.
• Apply new engine oil to the threads and the seating surfaces of bolts.
CAUTION:
• If cylinder head bolts are re-used, check their outer diameters before installation. Follow the
Outer Diameter of Cylinder Head Bolts measurement procedure.
• Check and confirm the tightening angle by using angle wrench or protractor. Avoid judgment by
visual inspection without the tool.
4. Installation of the remaining components is in the reverse order of removal.
Limit (d1 - d2)
: 0.23 mm (0.0091 in) or less
KBIA0189E
Tool number
: KV10112100 (BT-8653-A)
WBIA0155E
Step a
: 98.1 N·m (10 kg-m, 72 ft-lb)
Step b
: Loosen to 0 N·m in the reverse order of tight-
ening.
Step c
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
Step d
: 75
° clockwise
Step e
: 75
° clockwise
KBIA0058E
WBIA0033E
EM-66
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CYLINDER HEAD
Disassembly and Assembly
INFOID:0000000004202131
CAUTION:
• When installing camshafts, chain tensioners, oil seals or other sliding parts, lubricate contacting
surfaces with new engine oil.
• Apply new engine oil to threads and seat surfaces when installing the cylinder head, camshaft
sprocket, crankshaft pulley and camshaft bracket.
• Attach tags to valve lifters so all parts are assembled in their original position.
DISASSEMBLY
1. Remove the valve lifter.
• Confirm installation point.
2. Remove the valve collet, valve spring retainer and valve spring
using Tool.
CAUTION:
Do not remove valve spring seat from valve spring.
3. Push valve stem to combustion chamber side, and remove
valve.
• Inspect valve guide clearance before removal. Refer to
68, "Inspection After Disassembly"
.
AWBIA0211ZZ
1.
Valve collet
2.
Valve spring retainer
3.
Valve spring
4.
Valve oil seal
5.
Valve guide
6.
Spark plug tube
7.
Cylinder head bolt
8.
Cylinder head gasket
9.
Valve seat (EXH)
10. Valve (EXH)
11. Valve (INT)
12. Valve seat (INT)
13. Cylinder head
A.
Follow installation procedure
Tool number
: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
WBIA0477E
CYLINDER HEAD
EM-67
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• Confirm installation point.
4. Remove valve oil seal using Tool.
5. When valve seat must be replaced, refer to
EM-68, "Inspection After Disassembly"
6. When valve guide must be replaced, refer to
EM-68, "Inspection After Disassembly"
7. Remove spark plug using suitable tool.
8. Remove spark plug tubes, if necessary using suitable tool.
CAUTION:
• Be careful not to damage cylinder head.
• Do not remove spark plug tube if not necessary. Once removed, the spark plug tube cannot be
reused because of deformation during removal.
ASSEMBLY
1. Install valve guide. Refer to
EM-68, "Inspection After Disassembly"
2. Install valve seat. Refer to
EM-68, "Inspection After Disassembly"
.
3. Install new valve oil seal using Tool as shown.
4. Install valve.
• Install larger diameter to intake side.
5. Install valve spring.
• Install valve spring so that the identification color faces upwards.
• Confirm the identification color of the valve spring.
• Intake: pink
• Exhaust: green
6. Install valve spring retainer.
7. Install valve collet using Tool.
• Compress valve spring with valve spring compressor. Install valve collet with magnet hand.
• Tap stem edge lightly with plastic hammer after installation to check its installed condition.
8. Install valve lifter.
Tool number
: KV10107902 (J-38959)
WBIA0478E
Oil seal installed height (A)
: 12.1 mm (0.476 in)
Tool number
: KV10115600 (J-38958)
AWBIA0019ZZ
Tool number
: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
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