1986 TOYOTA CAMRY V20 engine

(f) Alternately loosen and remove No. 2 bearing cap bolts 9
and 10.
HINT:
wAs bearing cap bolts 9 and 10 are loosened, check that the
camshaft is being lifted out straight and level, after breaking
adhesion on the front bearing cap.
wIf the camshaft is not being lifted out straight and level, re-
tighten bearing cap bolts 9 and 10. Reverse the order of
above steps from (f) to (a) and reset the knock pin of the in-
take camshaft at 80 ± 115° 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. 2 bearing cap and camshaft.
31. DISASSEMBLE EXHAUST CAMSHAFT
(a) Mount the hexagonal wrench head portion of the camshaft
in a vise.
(b) Insert service bolt (A) into the service hole of the cam-
shaft 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.
(d) Uniformly loosen and remove bearing cap bolts 3 to 8
in several pass in the sequence shown.
HINT: Do not remove the No. 2 bearing cap bolts at this
stage.
(e) Remove the No. 1, No. 3 and No. 4 bearing caps. (b) Remove the front bearing cap bolts i and 2.
(e) Remove the front bearing cap and oil seal.
NOTICE: If the front bearing cap is not removable by
hand, do not try to remove by force but leave as it is
without bolts.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±54

(e) Remove the following parts:
(1) Wave washer
(2) Camshaft sub±gear
(3) Camshaft gear spring
32. IF NECESSARY, REMOVE SPARK PLUG TUBES
Using a pipe wrench, remove the four spark tubes.
33. REMOVE CYLINDER HEAD
(a) Using SST, uniformly loosen and remove the ten cylinder
head bolts in several passes in the sequence shown.
SST 09043±88010
NOTICE: Head warpage or cracking could result from remov-
ing bolts in incorrect order.
(b) Lift the cylinder head from the dowels on the cylinder block and
place the head on wooden blocks on a bench.
HINT: If the cylinder head is difficult to lift off, pry with a screw-
driver between the cylinder head and block saliences.
NOTICE: Be careful not to damage the cylinder head and cylin-
der block surfaces of cylinder head gasket side.
(d) Using snap ring pliers, remove the snap ring.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±55

2. REMOVE VALVES
(a) Using SST, compress the valve spring and remove the two
keepers.
SST 09202±70010
(b) Remove the spring retainer, valve spring, valve and spring
seat.
DISASSEMBLY OF CYLINDER HEAD
(See page EM±47)
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 or-
der.
(c) Using needle±nose pliers, remove the oil seal.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±56

INSPECTION, CLEANING AND REPAIR OF
CYLINDER HEAD COMPONENTS
1. CLEAN TOP OF PISTONS AND TOP OF 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.
(b) Remove all the gasket material from the top of the cylinder block.
(e) Using compressed air, blow carbon and oil from the bolt holes.
CAUTION: Protect your eyes when using high pressure air.
2. REMOVE GASKET MATERIAL
Using a gasket scraper, remove all the gasket material from
the manifold and cylinder head surface.
NOTICE: Be careful not to scratch the surfaces.
3. CLEAN COMBUSTION CHAMBERS
Using a soft brush, remove all the carbon from the combus-
tion chambers.
NOTICE: Be careful not to scratch the head gasket contact
surface.
4. CLEAN VALVE GUIDE BUSHINGS
Using a valve guide bushing brush and solvent, clean all the
guide bushings.
5. CLEAN CYLINDER HEAD
Using a soft brush and solvent, thoroughly clean cylinder
head.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±57

6. INSPECT CYLINDER HEAD FOR FLATNESS
Using a precision straight edge and feeler gauge, measure
the surfaces contacting the cylinder block 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 cylinder head.
7. INSPECT CYLINDER HEAD FOR CRACKS
Using a dye penetrant, check the combustion chamber, in-
take and exhaust ports, head surface and the top of the
head for cracks.
If cracked, replace the cylinder head.
9. 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 ± 4.2374 in.)
8. CLEAN VALVES
(a) Using a gasket scraper, chip off any carbon from the valve
head.
(b) Using a wire brush, thoroughly clean the valve.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±58

(b) Using a micrometer, measure the diameter of the valve
stem.
Valve stem diameter:
Intake 5.970 ± 5.985mm
(0.2350 ± 0.2356 in.)
Exhaust 5.965 ± 5.980 mm
(0.2348 ± 0.2354 in.)
(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 ± 0.0026 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.
10. IF NECESSARY, REPLACE VALVE GUIDE BUSHINGS
(a) Gradually heat the cylinder head to 80 ±100
°C (176±
212°F).
(b) Using SST and a hammer, tap out the guide bushing.
SST 09201 ±700 10
(c) Using a caliper gauge, measure the bushing bore di-
ameter of the cylinder head.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±59

(d) Select a new guide bushing (STD size or 0/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:
Rebored cylinder head bushing bore dimension:
11. 050 ± 11.077 mm (0.4350 ± 0.4361 in.)
If the bushing bore diameter of the cylinder head is
greater than 11.077 mm (0.4361 in.), replace the cylin-
der head.
(e) Gradually heat the cylinder head to 80 100
°C (176 ±
212°F).
(f) Using SST and a hammer, tap in a newguide bushing
to where there is 8.2 ± 8.6 mm (0.303 0.339 in.)
protruding from the cylinder head.
SST 09201±70010
(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. 11. 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
°
Using a sharp 8 mm reamer, ream the guide bushing to
obtain the standard specified clearance (See page
EM±58) between the guide bushing and valve stem.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±60

(b) Check the valve seating position.
Apply a thin coat of Prussian blue (or white lead) to the
valve face. Lightly press the valve against the seat. Do
not rotate the valve.
(c) Check the valve face and seat for the following:
wIf blue appears 360° around the face, the valve is con-
centric. If not, replace the valve.
wIf blue appears 360° around the valve seat, the guide
and are concentric. If not, resurface the seat.
wCheck that the seat contact is in the middle of the valve
face with the following width:
1.0 ± 1.4 mm (0.039 ± 0.055 in.) (d) Check the valve overall length.
Standard overall length:
Intake 100.60 mm (3.9606 in.)
Exhaust 100.45 mm (3.9547 in.)
Minimum overall length:
Intake 100.1 mm (3.941 in.)
Exhaust 100.0 mm (3.937 in.)
If the overall length is less than minimum, 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 the minimum.
12. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45° carbide cutter, resurface the valve seats.
Remove only enough metal to clean the seats.
± ENGINE MECHANICALCylinder Head (3S±FE)EM±61