Nissan Altima L32. Instruction — part 662
EM-184
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CAMSHAFT
• When out of the specified range, replace either or both camshaft and cylinder head.
NOTICE:
Inner diameter of camshaft bracket is manufactured together with cylinder head. Replace the whole cylinder
head assembly.
Camshaft End Play
1. Install the camshaft in the cylinder head.
2. Install dial gauge in thrust direction on front end of camshaft.
Measure end play when camshaft is moved forward/backward
(in direction to axis) as shown.
• If out of the specified range, replace with new camshaft and mea-
sure again.
• If out of the specified range again, replace with new cylinder head.
Camshaft Sprocket Runout
1. Put V-block on precise flat bed and support No. 2 and No. 4 jour-
nal of camshaft as shown.
2. Install camshaft sprocket on camshaft.
3. Measure camshaft sprocket runout.
4. If sprocket runout exceeds the limit, replace camshaft sprocket.
Valve Lifter
• Check if the surface of the valve lifter has any excessive wear or
cracks, replace as necessary.
Valve Lifter Clearance
Outer Diameter of Valve Lifter
Standard
No.1
: 0.045 - 0.086 mm (0.0018 - 0.0034 in)
Standard
No.2, 3, 4
: 0.035 - 0.076 mm (0.0014 - 0.0030 in)
Limit
: 0.15 mm (0.0059 in)
Standard
: 0.115 - 0.188 mm (0.0045 - 0.0074 in)
Limit
: 0.24 mm (0.0094 in)
SEM864E
Runout
: Less than 0.15 mm (0.0059 in)
PBIC0930E
KBIA0182E
CAMSHAFT
EM-185
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• Measure the outer diameter of the valve lifter. Refer to
.
• If out of the specified range, replace the valve lifter.
Valve Lifter Bore Diameter
• Using inside micrometer, measure diameter of valve lifter bore of
.
• If out of the specified range, replace the cylinder head assembly.
Calculation of Valve Lifter Clearance
• (Valve lifter clearance) = (hole diameter for valve lifter) – (outer diameter of valve lifter) Refer to
.
• If out of specified range, replace either or both valve lifter and cylinder head assembly.
Inspection after Installation
INFOID:0000000004202174
INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE
WARNING:
• Check when engine is cold so as to prevent burns from any splashing engine oil.
CAUTION:
• Perform this inspection only when DTC P0011 is detected in self-diagnostic results of CONSULT III
and it is directed according to inspection procedure of EC section. Refer to
1. Check engine oil level. Refer to
2. Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a. Release fuel pressure. Refer to
.
b. Disconnect ignition coil and injector harness connectors if practical.
3. Remove IVT control solenoid valve.
4. Crank engine, and then make sure that engine oil comes out
from IVT control cover oil hole. End cranking after checking.
WARNING:
Be careful not to touch rotating parts (drive belts, idler pul-
ley, and crankshaft pulley, etc.).
CAUTION:
• Engine oil may squirt from IVT control solenoid valve
installation hole during cranking. Use a shop cloth to pre-
vent engine oil from splashing on worker, engine compo-
nents and vehicle.
JEM798G
SEM867E
KBIA2686E
EM-186
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CAMSHAFT
• Do not allow engine oil to get on rubber components such as drive belts or engine mount insula-
tors. Immediately wipe off any splashed engine oil.
5. Clean oil groove between oil strainer and IVT control solenoid valve if engine oil does not come out from
IVT control cover oil hole.
6. Remove components between IVT control solenoid valve and camshaft sprocket (INT), and then check
each oil groove for clogging.
• Clean oil groove if necessary.
7. After inspection, installation of the remaining components is in the reverse order of removal.
OIL SEAL
EM-187
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OIL SEAL
Removal and Installation of Valve Oil Seal
INFOID:0000000004202175
REMOVAL
1. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping
into cylinder.
CAUTION:
When rotating crankshaft, be careful to avoid scarring the front cover with the timing chain.
2. Remove camshaft relating to valve oil seal to be removed. Refer to
EM-177, "Removal and Installation"
.
3. Remove valve lifters. Refer to
EM-177, "Removal and Installation"
4. Remove valve collet, valve spring retainer and valve spring
using Tool.
CAUTION:
When working, take care not to damage valve lifter holes.
• Compress valve spring using Tool attachment, adapter.
Remove valve collet with magnet hand.
5. Remove valve oil seal using Tool.
INSTALLATION
1. Apply new engine oil to new valve oil seal joint surface and seal lip.
2. Press in valve oil seal to height (H) using Tool to specified
height.
NOTE:
Dimension (H): height measured before valve spring seat instal-
lation.
3. Installation of the remaining components is in the reverse order
of removal.
Removal and Installation of Front Oil Seal
INFOID:0000000004202176
REMOVAL
1. Remove the following parts:
• Engine undercover.
• Drive belts. Refer to
EM-121, "Removal and Installation"
.
Tool numbers
: KV10116200 (J-26336-A)
: KV10115900 (J-26336-20)
: KV10109230 ( — )
WBIA0578E
Tool number
: KV10107902 (J-38959)
WBIA0489E
Tool number
:
—
(J-39386)
Intake and exhaust
: 14.3 - 14.9 mm (0.563 - 0.587 in)
WBIA0490E
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