
The 5S±FE engine is an in±line, 4±cylinder engine with the cylinders numbered 1±2±3±4
from the front. The crankshaft is supported by five bearings inside the crankcase. These bearings
are made of aluminum alloy.
The crankshaft is integrated with eight weights for balance. Oil holes are placed in the center of
the crankshaft to supply oil to the connecting rods, bearing, pistons and other components.
The firing order is 1±3±4±2. The cylinder head is made of aluminum alloy, with a cross flow
type intake and exhaust layout and with pent±roof type combustion chambers. The spark plugs
are located in the center of the combustion chambers.
The intake manifold has four independent long ports and utilizes the inertial supercharging effect
to improve engine torque at low and medium speeds.
Exhaust and intake valves are equipped with irregular pitch springs made of special valve spring
carbon steel which are capable of functioning no matter what the engine speed.
The intake camshaft is driven by a timing belt, and a gear on the intake camshaft engages with
a gear on the exhaust camshaft to drive it. The cam journal is supported at five places between
the valve lifters of each cylinder and on the front end of the cylinder head. Lubrication of the cam
journals and gears is accomplished by oil being supplied through the oiler port in the center of the
camshaft.
Adjustment of the valve clearance is done by means of an outer shim type system, in which valve
adjusting shims are located above the valve lifters. This permits replacement of the shims without
removal of the camshafts.
Pistons are made of high temperature±resistant aluminum alloy, and a depression is built into
the piston head to prevent interference with the valves.
Piston pins are the full±floating type, with the pins fastened to neither the piston boss nor the
connecting rods. Instead, snap rings are fitted on both ends of the pins, preventing the pins from
falling out.
The No.1 compression ring is made of steel and the No.2 compression ring is made of cast iron.
The oil ring is made of a combination of steel and stainless steel. The outer diameter of each
piston ring is slightly larger than the diameter of the piston and the flexibility of the rings allows
them to hug the cylinder walls when they are mounted on the piston. Compression rings No.1 and
No.2 work to prevent gas leakage from the cylinder and the oil ring works to scrape oil off the
cylinder walls to prevent it from entering the combustion chambers.
The cylinder block is made of cast iron. It has four cylinders which are approximately twice the
length of the piston stroke. The top of each cylinder is closed off by the cylinder head and the
lower end of the cylinders becomes the crankcase, in which the crankshaft is installed. In
addition, the cylinder block contains a water jacket, through which coolant is pumped to cool the
cylinders.
The oil pan is bolted onto the bottom of the cylinder block. The oil pan is an oil reservoir made of
pressed sheet steel. A dividing plate is included 'inside the oil pan to keep sufficient oil in the
bottom of the pan even when the vehicle is tilted. This dividing plate also prevents the oil from
making waves when the vehicle is stopped suddenly and the oil shifts away from the oil pump
suction pipe.
The 5S±FE engine uses two balance shafts. The balance shafts are fitted in balance shaft
housings that are located at the bottom of the cylinder block. The No. 1 balance shaft is driven by
the drive gear of the crankshaft No.3 counterweight at twice the speed of the crankshaft. The No.
2 balance shaft is driven by the No±1 balance shaft at the same speed in the same direction as the
crankshaft. The balance shafts are designed to eliminate secondary inertia force from the engine,
thereby reducing the engine noise (booming noise).
± 5S±FE ENGINEENGINE MECHANICALEG1±3

HINT (When re±using timing belt): After loosening
the crankshaft pulley bolt, check that the timing belt
matchmark aligns with the end of the No. 1 timing belt
cover when the crankshaft pulley groove is aligned
with the timing mark ª0º of the No. 1 timing belt cover.
If the matchmark does not align, align as follows:
When matchmark is misaligned counterclockwise:
wAlign the rnatchmarks by pulling the timing belt up
on the No.1 idler pulley side while turning the
crankshaft pulley clockwise. When matchmark is misaligned clockwise:
wAlign the matchmark by pulling the timing belt up
on the water pump pulley side while turning the
crankshaft pulley counterclockwise.
wAfter aligning the matchmark, hold the timing
belt, turn the crankshaft pulley clockwise, and
align its groove with timing mark ª0º of the No.1
timing belt cover. 16. REMOVE CRANKSHAFT PULLEY
(a) Using SST, remove the pulley bolt.
SST 09213±54015 (91651± 60855),
09330±00021
± 5S±FE ENGINEENGINE MECHANICALEG1±29

TIMING BELT COMPONENTS INSPECTION
1. INSPECT TIMING BELT
NOTICE:
wDo not bend, twist or turn the timing belt Inside out.
wDo not allow the timing belt to come into contact
with oil, water or steam.
22. REMOVE CRANKSHAFT TIMING PULLEY
If the pulley cannot be removed by hand, use 2 screw±
drivers.
HINT: Position shop rags as shown to prevent
damage.20. REMOVE NO.1 IDLER PULLEY AND TENSION
SPRING
Remove the bolt, pulley and tension spring.
23. REMOVE OIL PUMP PULLEY
Using SST, remove the nut and pulley.
SST 09616±3001121. REMOVE NO.2 IDLER PULLEY
Remove the bolt and pulley.
± 5S±FE ENGINEENGINE MECHANICALEG1±31

wDo not utilize timing belt tension when installing or
removing the mounting bolt of the camshaft timing
pulley.
If there are any defects as shown in the illustration,
check the following points:
(a) Premature parting
wCheck for proper installation.
wCheck the timing cover gasket for damage and
proper installation.
(b) If the belt teeth are cracked or damaged, check to see
if either camshaft or water pump is locked.
(e) If there is noticeable wear on the belt teeth, check the
timing cover for damage, correct gasket installation,
and for foreign material on the pulley teeth.
If necessary, replace the timing belt. (c) If there is noticeable wear or cracks on the belt face,
check to see if there are nicks on the side of the idler
pulley lock.
(d) If there is wear or damage on only one side of the belt,
check the belt guide and the alignment of each pulley.
± 5S±FE ENGINEENGINE MECHANICALEG1±32

4. TEMPORARILY INSTALL NO.1 IDLER PULLEY AND
TENSION SPRING
(a) Install the pulley with the bolt. Do not tighten the bolt
yet.
HINT: Use a bolt 42 mm (1.65 in.) in length.
(b) Install the tension spring.
(c) Pry the pulley toward the left as far as it will go and
tighten the bolt.
(d) Check that the idler pulley moves smoothly.
5. TEMPORARILY INSTALL TIMING BELT
NOTICE: The engine should be cold.
(a) Using the crankshaft pulley bolt, turn the crankshaft
and position the key groove of the crankshaft timing
pulley upward.
(b) Remove any oil or water on the crankshaft pulley, oil
pump pulley, water pump pulley, No. 1 idler pulley, No.
2 idler pulley and keep them clean.
(c) Install the timing belt on the crankshaft timing pulley,
oil pump pulley, No.1 idler pulley, water pump pulley
and No.2 idler pulley.
HINT (When re±using timing belt): Align the points
marked during removal, and install the belt with the
arrow pointing in the direction of engine revolution. 2. INSTALL CRANKSHAFT TIMING PULLEY
(a) Align the timing pulley set key with the key groove of
the pulley.
(b) Slide on the timing pulley, facing the flange side
inward.
3. INSTALL NO.2 IDLER PULLEY
(a) Install the pulley with the bolt.
Torque: 42 N±m (425 kgf±cm, 31 ft±lbf)
HINT: Use a bolt 35 mm (1.38 in.) in length.
(b) Check that the idler pulley moves smoothly.
± 5S±FE ENGINEENGINE MECHANICALEG1±34

9. REMOVE TIMING BELT AND PULLEYS
10. REMOVE CYLINDER HEAD
11. REMOVE WATER PUMP AND GENERATOR
ADJUSTING BAR
12. REMOVE OIL PAN AND OIL PUMP
13. REMOVE OIL FILTER
14. w/ OIL COOLER:
REMOVE OIL COOLER 4. REMOVE REAR END PLATE
Remove the bolt and end plate.
5. INSTALL ENGINE TO ENGINE STAND FOR
DISASSEMBLY
6. REMOVE GENERATOR
7. REMOVE DISTRIBUTOR1. M/T:
REMOVE CLUTCH COVER AND DISC
2. M/T:
REMOVE FLYWHEEL
3. A/T:
REMOVE DRIVE PLATE
15. REMOVE KNOCK SENSOR
Using SST, remove the knock sensor.
SST 09816 ± 300108. REMOVE PS PUMP BRACKET
Remove the 3 bolts and PS pump bracket.
PREPARATION FOR DISASSEMBLY
± 5S±FE ENGINEENGINE MECHANICALEG1±93

2. w/ OIL COOLER:
INSTALL OIL COOLER
3. INSTALL OIL FILTER
4. INSTALL OIL PUMP AND OIL PAN
5. INSTALL WATER PUMP AND GENERATOR
ADJUSTING BAR
6. INSTALL CYLINDER HEAD
7. INSTALL PULLEYS AND TIMING BELT
POST ASSEMBLY
1. INSTALL KNOCK SENSOR
Using SST, install the knock sensor.
SST 09816±30010
Torque: 37 N±m (380 kgf±cm. 27 ft±lbf)
8. INSTALL PS PUMP BRACKET
Install the PS pump bracket with 3 bolts.
Torque: 43 N±m (440 kgf±cm, 32 ft±lbf)
9. INSTALL GENERATOR
10. INSTALL DISTRIBUTOR
11. REMOVE ENGINE STAND
12. INSTALL REAR END PLATE
Torque: 9.3 N±m (95 kgf±cm, 82 in.±lbf)
± 5S±FE ENGINEENGINE MECHANICALEG1±125

No. 1 balance shaft housing x No. 2 balance shaft housing (1st)
No. 1 balance shaft housing x No. 2 balance shaft housing (2nd)
FR engine mounting insulator x Front suspension member
RR engine mounting insulator x Front suspension member Exhaust manifold stay x FR engine mounting insulator No. 1 air intake chamber stay x Intake manifold
RR engine mounting insulator x Cylinder block
FR engine mounting insulator x Cylinder block No. 1 air intake chamber stay x Cylinder head
No. 1 exhaust manifold stay x Cylinder block
Connecting rod cap x Connecting rod (2nd) Connecting rod cap x Connecting rod (1 st)
LH engine mounting insulator x Transaxle No. 1 exhaust manifold stay x WU ±TWC Water bypass pipe x Water pump cover
Fuel inlet hose x Fuel filter (Union bolt) No. 3 timing belt cover x Cylinder head
Intake manifold stay x Intake manifoldCamshaft bearing cap x Cylinder head
Intake manifold stay x Cylinder blockCylinder head x Cylinder block (2nd)
Rear oil seal retainer x Cylinder block Exhaust manifold stay x WU ±TWC
PS pump bracket x Cylinder block Main bearing cap x Cylinder block Generator bracket x Cylinder head
A/C compressor x Cylinder block Pulsation damper x Delivery pipe
Exhaust manifold x Cylinder head
Engine balancer x Cylinder block
Front exhaust pipe x WU ±TWC Spark plug tube x Cylinder head
Rear end plate x Cylinder block Throttle body x Intake manifold Intake manifold x Cylinder heedEngine hanger x Cylinder head
Drive plate x Crankshaft (A/T)Knock sensor x Cylinder block Delivery pipe x Cylinder head
PS pump x PS pump bracketWU±TWC x Exhaust manifold
Flywheel x Crankshaft (M/T) Water outlet x Cylinder headEGR valve x intake manifold
EGR pipe x Cylinder head
± 5S±FE ENGINEENGINE MECHANICALEG1±144