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CYLINDER HEAD
EM-69
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Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —
Page 2178 of 3502
EM-70
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CYLINDER HEAD
Disassembly and AssemblyBBS0059D
DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove valve lifter.
Identify installation positions, and store them without mixing them up.
3. Remove valve collet.
Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Remove valve collet with magnet
hand.
CAUTION:
When working, be careful not to damage valve lifter holes.
4. Remove valve spring retainer and valve spring (with valve spring seat).
CAUTION:
Do not remove valve spring seat from valve spring.
5. Push valve stem to combustion chamber side, and remove valve.
Identify installation positions, and store them without mixing them up.
1. Valve collet 2. Valve spring retainer 3. Valve spring (with valve spring seat)
4. Valve oil seal 5. Valve guide 6. Cylinder head
7. Valve seat 8. Valve (INT) 9. Valve (EXH)
10. Spark plug tube 11. Spark plug
PBIC2629E
PBIC1791E
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EM-71
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6. Remove valve oil seal with valve oil seal puller (SST).
7. When valve seat must be replaced, refer to EM-75, "
VALVE SEAT REPLACEMENT" to remo NISSAN TEANA 2003 Service Manual CYLINDER HEAD
EM-71
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6. Remove valve oil seal with valve oil seal puller (SST).
7. When valve seat must be replaced, refer to EM-75, "
VALVE SEAT REPLACEMENT" to remo](/manual-img/5/57392/w960_57392-2178.png)
CYLINDER HEAD
EM-71
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6. Remove valve oil seal with valve oil seal puller (SST).
7. When valve seat must be replaced, refer to EM-75, "
VALVE SEAT REPLACEMENT" to removal.
8. When valve guide must be replaced, refer to EM-73, "
VALVE GUIDE REPLACEMENT" to removal.
9. Remove spark plug tube, if necessary.
Using pliers, remove it from cylinder head.
CAUTION:
Be careful not to damage cylinder head.
Do not remove spark plug tube if not necessary. Once removed, spark plug tube cannot be
reused because of deformation.
ASSEMBLY
1. Install valve guide if removed. Refer to EM-73, "VALVE GUIDE REPLACEMENT" .
2. Install valve seat if removed. Refer to EM-75, "
VALVE SEAT REPLACEMENT" .
3. Install valve oil seal.
Install with valve oil seal drift (SST) to match dimension in the
figure.
4. Install valve.
Install larger diameter to intake side.
5. Install valve spring (with valve spring seat).
Install smaller pitch (valve spring seat side) to cylinder head
side.
Confirm identification color of valve spring.
6. Install valve spring retainer.
7. Install valve collet.
SEM093F
Height “H” : 11.8 - 12.4 mm (0.465 - 0.488 in)
KBIA1999J
Intake : Blue
Exhaust : Yellow
PBIC0525E
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![NISSAN TEANA 2003 Service Manual EM-72
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CYLINDER HEAD
Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnet
hand.
CAUTION:
When working, be careful not to damage v NISSAN TEANA 2003 Service Manual EM-72
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CYLINDER HEAD
Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnet
hand.
CAUTION:
When working, be careful not to damage v](/manual-img/5/57392/w960_57392-2179.png)
EM-72
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CYLINDER HEAD
Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnet
hand.
CAUTION:
When working, be careful not to damage valve lifter
holes.
Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.
8. Install valve lifter.
Install it in the original position.
9. Install spark plug tube if removed.
Press-fit it into cylinder head with the following procedure:
a. Remove old liquid gasket from cylinder head side installation
hole.
b. Apply sealant all round on spark plug tube within approximately
12 mm (0.47 in) width from edge of spark plug tube on the
press-fit side.
Use Thread Locking Sealant or equivalent.
c. Using drift, press-fit spark plug tube so that height is as same as
“H” shown in the figure.
CAUTION:
When press-fitting, be careful not to deform spark plug tube.
After press-fitting, wipe off any protruding thread locking sealant on top surface of cylinder
head.
10. Install spark plug with spark plug wrench (commercial service tool).
Inspection After DisassemblyBBS0059E
VALVE DIMENSIONS
Check dimensions of each valve. For dimensions, refer to EM-
109, "Valve Dimensions" .
If dimensions are out of the standard, replace valve.
PBIC1791E
Standard press-fit height “H”
: 41.2 - 42.2 mm (1.622 - 1.661 in)
PBIC2636E
SEM188A
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EM-73
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VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter NISSAN TEANA 2003 Service Manual CYLINDER HEAD
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VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter](/manual-img/5/57392/w960_57392-2180.png)
CYLINDER HEAD
EM-73
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VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with bore gauge.
Valve Guide Clearance
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter)
If it exceeds the limit, replace valve guide and/or valve. When valve guide must be replaced, refer to EM-
73, "VALVE GUIDE REPLACEMENT" .
VALVE GUIDE REPLACEMENT
When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130°C (230
to 266°F) by soaking in heated oil. Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.955 - 5.970 mm (0.2344 - 0.2350 in)
SEM938C
Standard
Intake and Exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve guide clearance:
Standard
Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.030 - 0.063 mm (0.0012 - 0.0025 in)
Limit
Intake : 0.08 mm (0.003 in)
Exhaust : 0.09 mm (0.004 in)
SEM008A
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EM-74
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CYLINDER HEAD
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US
ton, 2.0 lmp ton) force] or hammer and valve guide drift (com-
mercial service tool).
CAUTION:
Cylinder head contains heat, when working, wear protective
equipment to avoid getting burned.
3. Ream cylinder head valve guide hole with valve guide reamer
(commercial service tool).
4. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
5. Using valve guide drift (commercial service tool), press valve
guide from camshaft side to dimensions as shown in the figure.
CAUTION:
Cylinder head contains heat, when working, wear protective
equipment to avoid getting burned.
SEM931C
Valve guide hole diameter (for service parts):
Intake and exhaust
: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
SEM008A
Projection “H”:
Intake : 10.1 - 10.3 mm (0.398 - 0.406 in)
Exhaust : 10.0 - 10.4 mm (0.394 - 0.409 in)
PBIC2187E
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6. Apply reamer finish to valve guide with valve guide reamer
(commercial service tool).
VALVE SEAT CONTACT
After confirming that the dimensions o NISSAN TEANA 2003 Service Manual CYLINDER HEAD
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6. Apply reamer finish to valve guide with valve guide reamer
(commercial service tool).
VALVE SEAT CONTACT
After confirming that the dimensions o](/manual-img/5/57392/w960_57392-2182.png)
CYLINDER HEAD
EM-75
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6. Apply reamer finish to valve guide with valve guide reamer
(commercial service tool).
VALVE SEAT CONTACT
After confirming that the dimensions of valve guides and valves
are within specifications, perform this procedure.
Apply prussian blue (or white lead) onto contacting surface of
valve seat to check the condition of the valve contact on the sur-
face.
Check if the contact area band is continuous all around the cir-
cumference.
If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has NG conditions even after the re-check,
replace valve seat. Refer to EM-75, "
VALVE SEAT REPLACE-
MENT" .
VALVE SEAT REPLACEMENT
When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-112, "
Va l v e S e a t" .
CAUTION:
Prevent to scratch cylinder head by excessive boring.
2. Ream cylinder head recess diameter for service valve seat.
Be sure to ream in circles concentric to the valve guide center.
This will enable valve seat to fit correctly.
3. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
4. Provide valve seat cooled well with dry ice. Press-fit valve seat into cylinder head.
CAUTION:
Avoid directly to touching cold valve seats.Standard
Intake and exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C
SBIA0322E
Oversize [0.5 mm (0.020 in)]
Intake : 37.000 - 37.016 mm (1.4567 - 1.4573 in)
Exhaust : 32.000 - 32.016 mm (1.2598 - 1.2605 in)
SEM795A
SEM008A
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![NISSAN TEANA 2003 Service Manual EM-76
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CYLINDER HEAD
Cylinder head contains heat, when working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder NISSAN TEANA 2003 Service Manual EM-76
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CYLINDER HEAD
Cylinder head contains heat, when working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder](/manual-img/5/57392/w960_57392-2183.png)
EM-76
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CYLINDER HEAD
Cylinder head contains heat, when working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder, finish valve seat to the specified dimensions. For
dimensions, refer to EM-112, "
Va l v e S e a t" .
CAUTION:
When using valve seat cutter, firmly grip the cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with the cutter or cutting many different times
may result in stage valve seat.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to EM-75, "
VALVE SEAT CONTACT" .
VALVE SPRING SQUARENESS
Set try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top face of spring
and try square.
CAUTION:
Do not remove valve spring seat from valve spring.
If it exceeds the limit, replace valve spring (with valve spring
seat).
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Check valve spring each load at specified spring height.
CAUTION:
Do not remove valve spring seat from valve spring.
Standard:
If the installation load or load with valve open is out of the standard, replace valve spring (with valve spring
seat).
SEM934C
Limit : 1.9 mm (0.075 in)
PBIC0080E
SEM113
Items Intake Exhaust
Free height 44.84 - 45.34 mm (1.7654 - 1.7850 in) 45.28 - 45.78 mm (1.7827 - 1.8024 in)
Installation height 35.30 mm (1.390 in) 35.30 mm (1.390 in)
Installation load 151 - 175 N (15.4 - 17.8 kg, 34 - 39 lb) 151 - 175 N (15.4 - 17.8 kg, 34 - 39 lb)
Height during valve open 24.94 mm (0.9819 in) 26.39 mm (1.0390 in)
Load with valve open 358 - 408 N (36.5 - 41.6 kg, 80 - 92 lb) 325 - 371 N (33.1 - 37.8 kg, 73 - 83 lb)
Identification color Blue Yellow