1986 TOYOTA CAMRY V20 engine

13. INSPECT VALVE SPRINGS
(a) Using a steel square, measure the squareness of the valve
spring.
Maximum squareness: 2.0 mm (0.075 in.)
If squareness is greater than maximum, replace the valve
spring.
(b) Using calipers, measure the free length of the valve
spring.
Free length: 45.0 mm (1.772 in.)
If the free length is not as specified, replace the valve
spring. (d) Hand±lap the valve and valve seat with an abrasive
compound.
(e) After hand±lapping, clean the valve and valve seat. If not, correct the valve seats as follows:
(1) If the seating is too high on the valve face, use 30°
and 45° cutters to correct the seat.
(2) If the seating is too low on the valve face, use 75°
and 45° cutters to correct the seat.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±62

B. Inspect cam lobes
Using a micrometer, measure the cam lobe height.
Standard cam lobe height:
Intake 34.910 ± 35 .010 mm
(1.3744 ± 1.3783 in.)
Exhaust 35.560 ± 35.660 mm
(1.4000 ± 1.4039 in.)
Minimum cam lobe height:
Intake 34.80 mm (1.3701 in.)
Exhaust 35.45 mm (1 .3957 in.)
If the cam lobe height is greater than maximum, replace the
camshaft.
C. Inspect camshaft journals
Using a micrometer, measure the journal diameter.
Journal diameter: 26.959 ± 26.975 mm
0.0614 ± 1.0620 in.)
If the journal diameter is not as specified, check the oil clear-
ance. 14. INSPECT CAMSHAFTS AND BEARINGS
A. Inspect camshaft for runout
(a) Place the camshaft on V±blocks.
(b) Using a dial indicator, measure the circle runout at the center
journal.
Maximum circle runout: 0.04 mm (0.0016 in.)
If the circle runout is greater than maximum, replace the cam-
shaft. (c) Using a spring tester, measure the tension of the valve
spring at the specified installed length.
Installed tension:
16.7 19.3 kg (36.8 42.5 Ib, 164 189 N )
at 34.7 mm (0.000 in.)
If the installed tension is not as specified, replace the
valve spring.
D. Inspect camshaft bearings
Check the bearings for flaking and scoring.
If the bearings are damaged, replace the bearing caps and
cylinder head as a set.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±63

F. Inspect camshaft journal oil clearance
(a) Clean the bearing caps and camshaft journals.
(b) Place the camshafts on the cylinder head.
(c) Lay a strip of Plastigage across each of the camshaft jour-
nals.
(d) Install the bearing caps.
(See step 4 on pages EM±68 and 69)
Torque: 190 kg±cm (14 ft±Ib, 19 N±m )
HINT: Do not turn the camshaft.
(e) Remove the bearing caps.
(f) Measure the Plastigage at its widest point.
Standard oil clearance: 0.025 ± 0.062
(0.0010 ± 0.0024 in.)
Maximum oil clearance 0.10 mm (0.0039 in.)
If the oil clearance is greater than maximum, replace the cam-
shaft. If necessary, replace the bearing caps and cylinder
head as a set.
(g) Completely remove the Plastigage.
G. Inspect camshaft thrust clearance
(a) Install the camshafts.
(See step 4 on pages EM±67 and 69)
(b) Using a dial indicator, measure the thrust clearance while
moving the camshaft back and forth.
Standard thrust clearance:
Intake 0.045 ± 0.100 mm
(0.0018 ± 0.0039 in.)
Exhaust 0.030 ± 0.085 mm
(0.0012 ± 0.0033 in.)
Maximum thrust clearance:
Intake 0.12 mm (0.0047 in.)
Exhaust 0.10 mm (0.0039 in.)
If the thrust clearance is greater than maximum, replace the
camshaft. If necessary, replace the bearing caps and cylin-
der head as a set.E. Inspect camshaft gear spring
Using calipers, measure the free distance between the
spring end.
Free distance: 22.5 ± 22.9 mm (0.886 ± 0.902 in.)
If the free distance is not as specified, replace the gear
spring.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±64

H. Inspect camshaft gear backlash
(a) Install the camshafts without installing the exhaust cam
sub±gear.
(See step 4 o n page EM±68 to 70)
(b) Using a dial indicator, measure the backlash.
Standard backlash: 0.020 ± 0.200 mm
(0.0008 ± 0.0079 in.)
Maximum backlash 0.30 mm (0.0188 in.)
If the backlash is greater than maximum, replace the cam-
shafts.
15. INSPECT VALVE LIFTERS AND LIFTER BORES
(a) Using a micrometer, measure the lifter diameter.
Lifter diameter: 27.975 ± 27.985 mm
(1.1014 ± 1.1018 in.)
(c) Subtract the lifter diameter measurement from the lifter
bore diameter measurement.
Standard oil clearance: 0.015 ± 0.046 mm
(0.0005 ± 0.0018 in.)
Maximum oil clearance: 0.07 mm (0.0028 in.)
If the oil clearance is greater than maximum, replace the
lifter. If necessary, replace the cylinder head.
16. INSPECT INTAKE AND EXHAUST MANIFOLDS
Using a precision straight edge and feeler gauge, measure
the surface contacting the cylinder head for warpage.
Maximum warpage: 0.30 mm (0.0118 in.)
If warpage is greater than maximum, replace the manifold. (b) Using a caliper gauge, measure the lifter bore diameter
of the cylinder head.
Lifter bore diameter: 28.000 ± 28.021 mm
(1.1024 ± 1.1032 in.)
± ENGINE MECHANICALCylinder Head (3S±FE)EM±65

ASSEMBLY OF CYLINDER HEAD
(See page EM±48)
HINT:
wThoroughly clean all parts to be assembled.
wBefore installing the parts, apply new engine oil to all
sliding and rotating surfaces.
wReplace all gaskets and oil seals with new ones.
1. INSTALL VALVES
HINT: The intake valve oil seal is brown and the exhaust
valve oil seal is black.
(a) Install the following parts:
(1) Oil seal
(2) Valve
(3) Spring seat
(4) Valve spring
(5) Spring retainer
2. INSTALL VALVE LIFTERS AND SHIMS
(a) Install the valve lifter and shim.
(b) Check the valve lifter rotates smoothly by hand. (b) Using SST, compress the valve spring and place the
two keepers around the valve stem.
SST 09202±70010
(c) Using a plastic±faced hammer, lightly tap the valve
stem tip to assure proper fit.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±66

1. INSTALL CYLINDER HEAD
A. Place cylinder head on cylinder block
(a) Place a new cylinder head gasket in position on the cylinder
block.
NOTICE: Be careful of the installation direction.
(b) Place the cylinder head in position on the cylinder head gas-
ket.
B. Install cylinder head bolts
HINT:
wThe cylinder head bolts are tightened in two progressive
steps (steps (b) and (d)).
wIf any cylinder head bolt is broken or deformed, replace it.
(a) Apply a light coat of engine oil on the threads and under the
heads of the cylinder head bolts.
(b) First, using SST, install and uniformly tighten the ten cylinder
head bolts in several passes in the sequence shown.
SST 09011±38121
Torque: 500 kg±cm (36 ft±Ib, 49 N±m)
If any one of the cylinder head bolts does not meet the
torque specification, replace the cylinder head bolt.
(d) 2nd, retighten the cylinder head bolts 90° in the numeri-
cal order shown.
(e) Check that the painted mark is now at a 90° angle to
front.
INSTALLATION OF CYLINDER HEAD
(See page EM±48)
(c) Mark the front of the cylinder head bolt head with
paint. .
± ENGINE MECHANICALCylinder Head (3S±FE)EM±67

.
(d) Insert a service bolt (A) into the service hole of the camshaft
sub±gear.
(e) Using a screwdriver, align the holes of the camshaft main
gear and sub±gear by turning camshaft sub±gear clock-
wise, and install a service bolt (B).
NOTICE: Be careful not damage the camshaft.
4. INSTALL CAMSHAFTS
HINT: Since the thrust clearance of the camshaft is small,
the camshaft must be held level while it is being installed.
If the camshaft is not kept level, the portion of the cylinder
head receiving the shaft thrust may crack or be damaged,
causing the camshaft to seize or break. To avoid this, the
following steps should be carried out.
A. Install intake camshaft
(a) Apply MP grease to the thrust portion of the camshaft.
(b) Place the intake camshaft at 80° BTDC of camshaft angle
on the cylinder head. 2. INSTALL SPARK PLUG TUBES
(a) Clean the cylinder head tube holes of any residual adhesive, oil
foreign particles. Remove any oil with kerosene or gasoline.
(b) Screw the threads of the spark plug tube coated with adhesive
into the cylinder head.
(c) Install the spark plug tube nut and using a 30 mm socket
wrench, torque the nuts.
Torque: 400 kg±cm (29 ft±lb, 39 N±m)
3. ASSEMBLE EXHAUST CAMSHAFT
(a) Mount the hexagonal wrench head portion of the camshaft
in a vice.
(b) Install the following parts:
(1) Camshaft gear spring
(2) Camshaft sub±gear
(3) Wave washer
(c) Using snap ring pliers, install the snap ring.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±68

(e) Apply alight coat of engine oil on the threads and under
the heads of the bearing cap bolts.
(f) Install and uniformly tighten the ten bearing cap bolts in
several passes in the sequence shown.
Torque: 190 kg±cm (14 ft±Ib, 19 N±m)
(c) Apply seal packing to the front bearing cap as shown.
Seal packing: Part No. 08826±00080 or equivalent
(h) Using SST, tap in the oil seal.
SST 09223±46011 (d) Install the bearing caps in their proper locations.
(g) Apply MP grease to a new oil seal lip.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±69