2000 SUZUKI SWIFT SF310 Service Workshop Manual

6A1-2 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)
GENERAL DESCRIPTION
ENGINE
The engine is a water-cooled, in line 4 cylinders, 4 stroke cycle gasoline unit equipped with its S.O.H.C. (Single
Overhead Camshaft) valve mechanism arranged for “V”-type valve configuration and 16 valves (IN 2 and EX 2 / one
cylinder).
The single overhead camshaft is mounted over the cylinder head: it is driven from crankshaft through timing belt
and opens and closes its valves via the rocker arms.

ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-3
ENGINE LUBRICATION
The oil pump is of a trochoid type, and mounted on crankshaft at crankshaft pulley side.
Oil is drawn up through oil pump strainer and passed through pump to oil filter.
The filtered oil flows into two paths in cylinder block. In one path, oil reaches crankshaft journal bearings.
Oil from crankshaft journal bearings is supplied to connecting rod bearings by means of intersecting passages
drilled in crankshaft, and then injected from a small hole provided on big end of connecting rod to lubricate piston,
rings, and cylinder wall.
In another path, oil goes up to cylinder head and lubricates camshaft journals, rocker arms, camshaft, etc., passing
through oil gallery in rocker arm shaft.
An oil relief valve is provided on oil pump. This valve starts relieving oil pressure when the pressure comes over
about 400 kPa (4.0 kg / cm
2, 56.9 psi). Relieved oil drains back to oil pan.

1. Rocker arm shaft
2. Rocker arm (EX)
3. Intake valve
4. Exhaust valve5. Rocker arm (IN)
6. Camshaft
7. Clip
8. PivotEx In
CYLINDER BLOCK
The cylinder block is made of cast aluminum alloy and
has 4 cylinders arranged “In-Line”. A cylindrical cast
iron sleeve is installed in each cylinder.
CRANKSHAFT AND MAIN
BEARINGS
A monoblock casting crankshaft is supported by
5 main bearings which are of precision insert type.
Four crank pins on the crankshaft are positioned 180
apart.
PISTONS, RINGS, PISTON PINS AND
CONNECTING RODS
The piston is cast aluminum alloy, and has two com-
pression rings and one oil ring.
Among two compression rings (top and 2nd rings),
the outer surface of the top ring is treated with hard
chromium for improvement in abrasion resistance.
The oil ring consists of two rails and one spacer. The
piston pin is offset 0.5 mm towards the major thrust
side.This allows a gradual change in thrust pressure
against the cylinder wall as the piston travels its path.
Pins, made of chromium steel, have a floating fit in the
pistons and in the connecting rods. The connecting
rods are made of forged steel, and the rod bearings
are of precision insert type.
CYLINDER HEAD AND VALVE TRAIN
The cylinder head is made of aluminum casting. The
supporting part of the camshaft is an independent cap
type. The combustion chamber has 4 valves and uses
the center plug type pent roof shape for higher intake
and exhaust efficiency.
As the intake side rocker arm is end pivot type, it
swings according to the camshaft movement to open
and close the intake valve.
On the other hand, the exhaust side rocker arm is see-
saw type. It swings with the rocker arm shaft as its
supporting point and according to the camshaft
movement to open and close the exhaust valve.
6A1-4 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)

1
2
ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-5
ON-VEHICLE SERVICE
COMPRESSION CHECK
Check compression pressure on all four cylinders as follows:
1) Warm up engine.
2) Stop engine after warming up.
NOTE:
After warming up engine, place transmission gear shift le-
ver in “Neutral” (shift selector lever to “P” range for A / T
model), and set parking brake and block drive wheels.
3) Remove ignition coil assemblies (1) and all spark plugs (2) refer-
ring to Section 6F.
WARNING:
Failure in disconnecting couplers from ignition coil as-
semblies can cause spark to occur in engine room possi-
bly resulting in a dangerous explosion.
4) Disconnect fuel injector wire harness at couplers (2).
5) Install special tools (Compression gauge) into spark plug hole.
Special Tool
(A): 09915-64510-001
(B): 09915-64510-002
(C): 09915-64530
(D): 09915-67010
6) Disengage clutch (to lighten starting load on engine) for M / T
model, and depress accelerator pedal all the way to make
throttle valve full-open.
7) Crank engine with fully charged battery, and read the highest
pressure on compression gauge.
Compression pressure
Standard1400 kPa
(14.0 kg / cm
2, 199.0 psi)
Limit1100 kPa
(11.0 kg / cm
2, 156.4 psi)
Max. difference between any
two cylinders100 kPa
(1.0 kg / cm
2, 14.2 psi)
8) Carry out steps 5) through 7) on each cylinder to obtain four
readings.
9) After checking, connect couplers to fuel injectors securely and
install spark plugs and ignition coil assemblies.

6A1-6 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)
ENGINE VACUUM CHECK
The engine vacuum that develops in the intake line is a good indica-
tor of the condition of the engine. The vacuum checking procedure
is as follows:
1) Warm up engine to normal operating temperature.
NOTE:
After warming up engine, place transmission gear shift le-
ver in “Neutral” (shift selector lever to “P” range for A / T
model), and set parking brake and block drive wheels.
2) With engine stopped, disconnect EVAP canister purge valve
hose from intake manifold and connect 3-way joint, hoses and
special tools (vacuum gauge and joint) between intake manifold
and vacuum hose disconnected.
Special Tool
(A): 09915-67311
(B): 09918-08210
SUZUKI GENUINE PARTS
(C): Hose 09343-03087
(D): 3-way joint 09367-04002
3) Run engine at specified idle speed, and read vacuum gauge.
Vacuum should be within the following specification.
Vacuum specification (at sea level):
52.6 – 65.8 kPa (40 – 50 cm
Hg, 15.7 – 19.7 in.Hg) at specified
idling speed
4) After checking, connect vacuum hose to intake surge tank.

ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-7
OIL PRESSURE CHECK
NOTE:
Prior to checking oil pressure, check the following items.

Oil level in oil pan.
If oil level is low, add oil up to Full level mark on oil level
gauge.

Oil quality.
If oil is discolored, or deteriorated, change it.
For particular oil to be used, refer to the table in Section 0B.

Oil leaks.
If leak is found, repair it.
1) Remove oil pressure switch (1) from cylinder block.
2) Install special tool (Oil pressure gauge) to vacated threaded
hole.
Special Tool
(A): 09915-77311
3) Start engine and warm it up to normal operating temperature.
NOTE:
Be sure to place transmission gear shift lever in “Neutral”
(shift selector lever to “P” range for A / T model), and set
parking brake and block drive wheels.
4) After warming up, raise engine speed to 4,000 r / min and mea-
sure oil pressure.
Oil pressure specification:
360 – 440 kPa (3.6 – 4.4 kg / cm
2, 51.2 – 62.6 psi) at 4,000 r / min
(rpm)
5) Stop engine and remove oil pressure gauge.

6A1-8 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)
6) Before reinstalling oil pressure switch (1), be sure to wrap its
screw threads with sealing tape (2) and tighten switch to speci-
fied torque.
NOTE:
If sealing tape edge is bulged out from screw threads of
switch, cut it off.
Tightening Torque
(a): 13 N
.m (1.3 kg-m, 9.5 lb-ft)
7) Start engine and check oil pressure switch for oil leakage.

2
IN
EX (A)
1
ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-9
VALVE LASH (CLEARANCE)
1) Remove negative cable at battery.
2) Remove cylinder head cover referring to item “Cylinder Head
cover”.
3) Remove engine under cover of right side from body.
4) Using special tool and wrench (1), turn crankshaft pulley clock-
wise until “V” mark (2) (in white paint) on pulley aligns with “0”
(zero) calibrated on timing belt cover.
Special Tool
(A): 09919-16020
5) See if the rocker arms of No.1 cylinder are off the respective cam
lobes (of camshaft); if so, valves (1), (2), (5) and (7) in figure are
ready for clearance checking and adjustment. Check valve
lashes at valves (1), (2), (5) and (7).
If the rocker arms of No.4 cylinder are off the respective cam
lobes, check valve lashes at valves (3), (4), (6) and (8).
NOTE:
When checking valve clearance, insert thickness gauge be-
tween camshaft and cam-riding face of rocker arm.