TOYOTA CAMRY 2000 Service Repair Manual

(f) Alternately loosen and remove the 2 bolts on the No.
3 bearing cap.
HINT:
wAs the 2 No.3 bearing cap bolts are loosened, make
sure that the camshaft is lifted out straight and level.
wIf the camshaft is not being lifted out straight and
level, retighten the 2 No.3 bearing cap bolts. Then
reverse the order of above steps from (f) to (a) and
reset the knock pin of the intake camshaft at 10±45

BTDC, and repeat steps from
(b) to
(f) once again.
NOTICE: Do not pry on or attempt to force the camshaft
with a tool or other object.
(g) Remove the No.3 bearing cap and exhaust camshaft.(d) Uniformly loosen and remove the6 bolts on the No. 1,
No.2 and No.4 bearing caps in several passes in the
sequence shown.
NOTICE: Do not remove the No.3 bearing cap bolts at this
stage.
(e) Remove the No. 1, No.2 and No.4 bearing caps.
B. Remove intake camshaft
(a) Set the knock pin of the intake camshaft at 80±115

BTDC of camshaft angle.
HINT: The above angle allows the No.1 and No.3
cylinder cam lobes of intake camshaft to push their
valve lifters evenly.(c) Remove the 2 bolts and rear bearing cap.
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(e) Alternately loosen and remove the 2 bolts on the No.
2 bearing cap.
HINT:
wAs the 2 No.2 bearing cap bolts are loosened, make
sure that the camshaft is lifted out straight and level,
after breaking adhesion on the front bearing cap.
wIf the camshaft is not being lifted out straight and
level, retighten the 2 No.2 bearing cap bolts. Reverse
the order of above steps from (e) to (a) and reset the
knock pin of the intake camshaft at 80±115*6TDC,
and repeat steps from (b) to (e) once again.
NOTICE: Do not pry on or attempt to force the camshaft
with a tool or other object.
(f) Remove the No.2 bearing cap and camshaft. (c) Uniformly loosen and remove the6 bolts on the No.1,
No.3 and No.4 bearing caps in several passes in the
sequence shown.
NOTICE: Do not remove the No.2 bearing cap bolts at this
stage.
(d) Remove the No. 1, No.3 and No.4 bearing caps.
36. DISASSEMBLE EXHAUST CAMSHAFT
(a) Mount the hexagon wrench head portion of the cam±
shaft in a vise.
NOTICE: Be careful not to damage the camshaft.
(b) Remove the 2 bolts, front bearing cap and oil seal.
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37. REMOVE CYLINDER HEAD
(a) Using SST, uniformly loosen and remove the 10 cylin±
der head bolts in several passes, in the sequence
shown.
SST 09011± 38121
NOTICE: Cylinder head warpage or cracking could result
from removing bolts in incorrect order.
(b) Insert a service bolt (A) into the service hole of the
camshaft sub gear.
(c) Using a screwdriver, turn the sub gear clockwise, and
remove the service bolt (B).
NOTICE: Be careful not to damage the camshaft.
(e) Remove the following parts:
(1) Wave washer
(2) Camshaft sub gear
(3) Camshaft gear spring (d) Using snap ring pliers, remove the snap ring.
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(b) Lift the cylinder head from the dowels on the cylinder
block, and place the cylinder head on wooden blocks
on a bench.
HINT: If the cylinder head is difficult to lift off, pry
between the cylinder head and cylinder block with a
screwdriver.
NOTICE: Be careful not to damage the contact surfaces
of the cylinder head and cylinder block.
2. REMOVE VALVES
(a) Using SST, compress the valve spring and remove the
2 keepers.
SST 09202 ± 70010
(b) Remove the spring retainer, valve spring, valve and
spring seat.
CYLINDER HEAD DISASSEMBLY
(See Components for Removal and Installation)
1. REMOVE VALVE LIFTERS AND SHIMS
HINT: Arrange the valves, valve springs, spring seats
and spring retainers in correct order. HINT: Arrange the valve lifters and shims in correct
order.
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CYLINDER HEAD COMPONENTS
INSPECTION, CLEANING AND REPAIR
1. CLEAN TOP SURFACES OF PISTONS AND
CYLINDER BLOCK
(a) Turn the crankshaft, and bring each piston to top dead
center (TDC). Using a gasket scraper, remove all the
carbon from the piston top surface.
(b) Using a gasket scraper, remove all the gasket material
from the cylinder block surface.
(c) Using compressed air, blow carbon and oil from the
bolt holes.
CAUTION: Protect your eyes when using high pressure
compressed air.
2. CLEAN CYLINDER HEAD
A. Remove gasket material
Using a gasket scraper, remove all the gasket material
from the cylinder block contact surface.
NOTICE: Be careful not to scratch the cylinder block
contact surface.
B. Clean combustion chambers
Using a wire brush, remove all the carbon from the
combustion chambers.
NOTICE: Be careful not to scratch the cylinder block
contact surface.
(c) Using needle±nose pliers, remove the oil seal.
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3. INSPECT CYLINDER HEAD
A. Inspect for flatness
Using a precision straight edge and thickness gauge,
measure the surfaces contacting the cylinder block
and the manifolds for warpage.
Maximum warpage:
Cylinder block side
0.05 mm (0.0020 in.)
Manifold side
0.08 mm (0.0031 in.)
If warpage is greater than maximum, replace the cylin±
der head.
B. Inspect for cracks
Using a dye penetrant, check the combustion cham±
bers, intake ports, exhaust ports and cylinder block
surface for cracks.
If cracked, replace the cylinder head. D. Clean cylinder head
Using a soft brush and solvent, thoroughly clean the
cylinder head. C. Clean valve guide bushings
Using a valve guide bushing brush and solvent, clean
all the guide bushings.
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(c) Subtract the valve stem diameter measurement from
the guide bushing inside diameter measurement.
Standard oil clearance:
Intake
0.025 ± 0.060 mm (0.0010 ± 0.0024 in.)
Exhaust
0.030 ± 0.065 mm (0.0012 ± 0.0028 in.)
Maximum oil clearance:
Intake
0.08 mm (0.0031 in.)
Exhaust
0.10 mm (0.0039 In.)
If the clearance is greater than maximum, replace the
valve and guide bushing. (b) Using a micrometer, measure the diameter of the
valve stem.
Valve stem diameter:
Intake
5.970 ± 5.985 mm (0.2350 ± 0.2356 in.)
Exhaust
5.965 ± 5.980 mm (0.2348 ± 0.2354 In.) 5. INSPECT VALVE STEMS AND GUIDE BUSHINGS
(a) Using a caliper gauge, measure the inside diameter of
the guide bushing.
Bushing inside diameter:
6.010 ±6.030 mm (0.2366 ± 0.2374 in.) 4. CLEAN VALVES
(a) Using a gasket scraper, chip off any carbon from the
valve head.
(b) Using a wire brush, thoroughly clean the valve.
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6. IF NECESSARY, REPLACE VALVE GUIDE
BUSHINGS
(a) w/ Snap Ring:
Insert an old valve wrapped with tape into the valve
guide bushing, and break off the valve guide bushing
by hitting it with a hammer. Remove the snap ring.
HINT: Wrap the tape approx. 8 mm (0.31 in.) from the
valve stem end.
NOTICE: Be careful not to damage the valve lifter hole.
(e) Select a new guide bushing (STD size or O/S 0.05).
If the bushing bore diameter of the cylinder head is
greater than 11.027 mm (0.4341 in.), machine the
bushing bore to the following dimension:
11.050 ± 11.077 mm (0.4350 ± 0.4301 in.)
If the bushing bore diameter of the cylinder head is
greater than 11.077 mm (0.4361 in.), replace the
cylinder head.(b) Gradually heat the cylinder head to 80±1005C (176±
2125F).
(d) Using a caliper gauge, measure the bushing bore di±
ameter of the cylinder head. (c) Using SST and a hammer, tap out the guide bushing.
SST 09201±70010
Bushing bore diameter
mm (in.)
11.050 ± 11.077
(0.4350 ± 0.4361) 11.000 ± 11.027
10.4331 ± 0.4341)Both intake and exhaust
Use O/S 0.05Bushing size
Use STD
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(c) Check the valve head margin thickness.
Standard margin thickness:
0.8 ± 1.2 mm (0.031 ± 0.047 in.)
Minimum margin thickness:
0.5 mm (0.020 in.)
If the margin thickness is less than minimum, replace
the valve. 7. INSPECT AND GRIND VALVES
(a) Grind the valve enough to remove pits and carbon.
(b) Check that the valve is ground to the correct valve
face angle.
Valve face angle:
44.5
(g) Using SST and a hammer, tap in a new guide bushing
until the snap ring makes contact with the cylinder
head.
SST 09201± 70010
(h) Using a sharp6 mm reamer, ream the guide bushing
to obtain the standard specified clearance (See page
EG1±57) between the guide bushing and valve stem. (f) Gradually heat the cylinder head to 80 ±100
C (117
±
212
F).
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(d) Check the valve overall length.
Standard overall length:
Intake
97.60 mm (3.8425 in.)
Exhaust
98.45 mm (3.8760 in.)
Minimum overall length:
Intake
97.1 mm (3.823 in.)
Exhaust
98.0 mm (3.858 in.)
If the overall length is less than minimum, replace the
valve.
(b) Check the valve seating position.
Apply a light coat of prussian blue (or white lead) to
the valve face. Lightly press the valve against the
seat. Do not rotate valve.
(c) Check the valve face and seat for the following:
If blue appears 360
around the face, the valve is
concentric. If not, replace the valve. (e) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, resurface the tip with a
grinder or replace the valve.
NOTICE: Do not grind off more than minimum.
8. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45
carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
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