Nissan Titan. Manual — part 319
EM-80
< REMOVAL AND INSTALLATION >
CYLINDER HEAD
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to spec-
ified level, if necessary.
• Summary of the inspection items:
*Power steering fluid, brake fluid, etc.
Exploded View
INFOID:0000000009886440
Item
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leakage
Level
Engine oil
Level
Leakage
Level
Transmission/
transaxle fluid
A/T and CVT Models
Leakage
Level/Leakage
Leakage
M/T Models
Level/Leakage
Leakage
Level/Leakage
Other oils and fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gas
—
Leakage
—
1.
Spark plug
2.
Valve lifter
3.
Valve collet
4.
Valve spring retainer
5.
Valve spring
6.
Valve spring seat
7.
Valve oil seal
8.
Valve guide
9.
Valve seat
10.
Valve (INT)
11. Valve (EXH)
12.
Cylinder head (LH bank)
13.
Spark plug tube
14. Cylinder head (RH bank)
WBIA0470E
CYLINDER HEAD
EM-81
< REMOVAL AND INSTALLATION >
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Disassembly and Assembly
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DISASSEMBLY
1. Remove the spark plug. Refer to
EM-17, "Removal and Installation"
2. Remove the valve lifter.
• Identify the installation positions, and store them without mixing them up.
3. Remove the valve collet using Tools.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove the valve spring retainer, valve spring and valve spring
seat.
5. Inspect the valve guide clearance. Refer to
6. Push the valve stem to the combustion chamber side, and remove the valve.
• Identify the installation positions, and store them without mixing them up.
7. Remove the valve oil seal using Tool.
8. Replace the valve seat if necessary. Refer to
EM-82, "Inspection After Disassembly"
.
9. Replace the valve guide if necessary. Refer to
EM-82, "Inspection After Disassembly"
10. Remove the spark plug tube, as necessary.
• Remove the spark plug tube out of the cylinder head using suitable tool.
CAUTION:
• Do not damage the cylinder head.
• Do not remove the spark plug tube unless absolutely necessary. Once removed, the spark plug
tube will be deformed and cannot be reused.
ASSEMBLY
1. Install the valve guide if necessary. Refer to
EM-82, "Inspection After Disassembly"
2. Install the valve seat if necessary. Refer to
EM-82, "Inspection After Disassembly"
.
3. Install the valve oil seal using Tool.
• Apply new engine oil on the new valve oil seal joint and seal
lip.
• Install the valve oil seal to the specified height (H).
4. Install the valves in their original position.
Tool number
: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
: KV10109220 ( — )
Tool number
: KV10107902 (J-38959)
WBIA0578E
WBIA0478E
Tool number
: KV10115600 (J-38958)
Height (H) (without valve spring installed)
Intake and exhaust
: 14.300 - 14.900 mm (0.5630 -
0.5870 in)
WBIA0490E
EM-82
< REMOVAL AND INSTALLATION >
CYLINDER HEAD
5. Install the valve spring seats.
6. Install the valve springs.
• Install the narrow pitch end (paint mark side) to the cylinder
head side.
7. Install the valve spring retainers.
8. Install the valve collet using Tools.
CAUTION:
When working, take care not to damage valve lifter holes.
9. Install the valve lifters.
• Install the removed parts in their original locations.
• If installing new lifters, select the correct size lifter for proper valve clearance. Refer to
10. Install the spark plug tube if necessary, following the procedure below.
a. Remove any old liquid gasket adhering to the cylinder-head spark plug tube hole.
b. Apply liquid gasket to area within approximately 12 mm (0.47 in) from the edge of the spark plug tube
press-fit side.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-21, "Recommended Chemical Prod-
.
c.
Press-fit the spark plug tube to the specified height (H) using
suitable tool.
CAUTION:
• When press-fitting, take care not to deform the spark plug
tube.
• After press-fitting, wipe off any liquid gasket protruding
onto the cylinder-head upper face.
11. Install the spark plugs. Refer to
Inspection After Disassembly
INFOID:0000000009886442
CYLINDER HEAD DISTORTION
1. Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder head surface.
CAUTION:
Do not allow any debris to enter the oil or coolant passages.
SEM085D
Tool number
: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
: KV10109220 ( — )
WBIA0578E
Standard press-fit height (H)
: 38.400 - 39.400 mm
(1.512 - 1.551 in)
KBIA1248E
CYLINDER HEAD
EM-83
< REMOVAL AND INSTALLATION >
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2. Measure the bottom surface of the cylinder head for distortion in
six directions as shown, using suitable tools.
• If measurement exceeds the limit, replace the cylinder head.
VALVE DIMENSIONS
• Check the dimensions of each valve. Refer to
.
• If the dimensions are out of the standard, replace the valve.
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of the valve stem using suitable tool.
Valve Guide Inside Diameter
Measure the inside diameter of the valve guide using suitable tool.
Valve Guide Clearance
• (Valve guide clearance) = (Valve guide inside diameter) – (Valve stem diameter).
• If the calculated value exceeds the limit, replace valve and/or valve guide. When the valve guide must be
replaced, follow the valve guide replacement procedure.
Standard
: 0.03 mm (0.0012 in)
Limit
: 0.1 mm (0.004 in)
PBIC0075E
SEM188A
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 (0.0031 in)
Exhaust : 0.09 mm (0.0035 in)
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