Valve SUZUKI SWIFT 2000 1.G SF310 Service Manual Online

2. WU-TWC
ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE) 6A-9
INSTALLATION
1) Install manifold gasket to cylinder head.
Before installing gasket, check it for deterioration or damage,
and replace as necessary.
2) Install exhaust manifold (1).
Tighten manifold bolts and nuts to specified torque.
Tightening Torque
(a): 23 N
.m (2.3 kg-m, 17.0 lb-ft)
3) Install exhaust manifold cover (2).
4) Install pipe seal, and then connect exhaust pipe (1).
Before installing pipe seal, check it for deterioration or damage,
and replace as necessary.
Tighten pipe bolts to specified torque.
Tightening Torque
(c): 43 N
.m (4.3 kg-m, 31.5 lb-ft)
5) Install WU-TWC stiffener (3). (if equipped)
6) Connect heated oxygen sensor coupler.
7) Clamp its wire securely.
8) Connect negative cable at battery.
9) Check exhaust system for exhaust gas leakage.

1. Timing belt
2. Tensioner
3. Tensioner plate
4. Tensioner spring
5. Spring damper
6. Camshaft timing pulley
7. Pin
8. Pulley bolt
9. Seal
10. Inside cover seal
11. Inside cover
12. Outside cover seal
13. Outside cover
14. Tensioner stud
15. Tensioner bolt
16. Tensioner spring screw
: Tightening Torque
6A-10 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
TIMING BELT AND BELT TENSIONER
REMOVAL
1) Disconnect negative cable at battery.
2) Hoist vehicle.
3) Remove clip (2) after pushing center pin, and then remove fend-
er apron extension (1) on right side.
NOTE:
Do not push center pin (3) too far in, or it will fall off into
fender.
4) Remove air cleaner assembly as previously outlined.
5) Remove A / C compressor drive belt, if equipped.
6) Loosen water pump pulley bolts (1).
7) Loosen generator pivot bolts (3) and its adjusting bolt (2) and re-
move water pump belt (4) and its pulley (5).

1.“V” mark on cylinder head cover
2. Timing mark on camshaft timing belt pulley
3. Arrow mark on oil pump case
4. Punch mark on crankshaft timing belt pulley
ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE) 6A-11
8) Loosen crankshaft pulley bolts (1) and remove crankshaft
pulley (2).
9) Remove timing belt outside cover (1).
10) Align 4 timing marks as shown in figure to facilitate its installa-
tion.
11) Loosen tensioner bolt (3) and stud (4), and remove belt (1) from
crankshaft timing belt pulley and camshaft timing belt pulley af-
ter pushing up the tensioner plate (2) fully by finger as shown
figure.
CAUTION:
Never bend timing belt.

6A-12 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
1. Camshaft allowable turning range – – – By timing
mark, within 90 from “V” mark on head cover on
both right and left.
2. Crankshaft allowable turning range – – – by punch
mark, within 90 from arrow mark on oil pump case
on both right and left.
CAUTION:
After timing belt is removed, never turn camshaft and crank-
shaft independently more than such an extent as shown be-
low. If turned, interference may occur among piston and
valves, and parts related to piston and valves may be dam-
aged.
12) Remove tensioner, tensioner plate, tensioner spring and
spring damper.
INSPECTION

Check timing belt for wear or crack. Replace it as necessary.

Check tensioner for smooth rotation and rattle.
INSTALLATION
1) Install tensioner plate (1) to tensioner (2).
Insert lug (3) of tensioner plate into hole (4) of tensioner.
2) Install tensioner (2) and tensioner plate (3).
Do not tighten the tensioner bolt (1) and stud by wrench yet.
Hand tighten only at this time.
Check to ensure that plate movement in arrow direction as
shown in figure causes tensioner to move in the same direction.
If no associated movement between plate and tensioner occurs,
remove tensioner and plate again and reinsert the plate lug into
tensioner hole.

1. Crank timing belt pulley bolt
Direction of crankshaft
ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE) 6A-13
3) Check that timing mark (3) on camshaft timing belt pulley (1) is
aligned with “V” mark (2) on cylinder head cover (4). If not, align
two marks by turning camshaft but be careful not to turn it more
than its allowable turning range which is described on previous
page.
4) Check that punch mark (2) on crank timing belt pulley (4) is
aligned with arrow mark (3) on oil pump case. If not, align two
marks by turning crankshaft but be careful not to turn it more
than its allowable turning range which is described on previous
page.
5) With two sets of marks aligned, install timing belt (1) on two pul-
leys in such a way that the drive side of belt is free of any slack,
and with tensioner plate pushed up by finger.
And then install tensioner spring and spring damper (2) as
shown in figure, and handtighten tensioner stud.
NOTE:

When installing timing belt, match arrow mark (
) on
timing belt with rotating direction of crankshaft.

In this state, No.1 piston is at top dead center of compres-
sion stroke.
6) To take up slack of timing belt, turn crankshaft two rotations
clockwise after installing it. After making sure that belt is free
from slack, tighten tensioner stud (1) first and then tensioner bolt
(2) to each specified torque.
Then confirm again that two sets of marks are aligned respec-
tively.
Tightening Torque
(a): 11 N
.m (1.1 kg-m, 8.0 lb-ft)
(b): 27 N
.m (2.7 kg-m, 19.5 lb-ft)

6A-14 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
7) Install timing belt outside cover.
Before installing, make sure that rubber seal (1) is between wa-
ter pump and oil pump case and another between water pump
and cylinder head.
Tightening Torque
(c): 11 N
.m (1.1 kg-m, 8.0 lb-ft)
8) Install crankshaft pulley (2).
Tighten crankshaft pulley bolts (1).
Tightening Torque
(d): 16 N
.m (1.6 kg-m, 11.5 lb-ft)
9) Install water pump pulley and water pump belt.
Adjust the belt tension to the specification.
Refer to Section 6B for procedure to adjust the belt tension.
10) Install air cleaner assembly.
11) Install fender apron extension of right side.
12) Connect negative cable at battery.

1. Cylinder head cover
2. Gasket
3. Cylinder head
4. Camshaft housing No.1:
Apply sealant 99000-31110 to mating surface.
5. Camshaft housing No.2
6. Camshaft housing No.3:
Apply sealant 99000-31110 to mating surface.
7. Camshaft
8. Oil seal
9. Valve lash adjuster
10. Camshaft housing bolt
1. Crankshaft timing belt pulley: Tightening Torque
: Apply engine oil to sliding
: surfaces of each part.
ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE) 6A-15
CAMSHAFT AND HYDRAULIC VALVE LASH ADJUSTER
REMOVAL
1) Disconnect negative cable at battery.
2) Remove cylinder head cover as previously outlined.
3) Remove distributor and then its case from cylinder head.
4) Remove crankshaft pulley, timing belt outside cover and timing
belt as previously outlined.
After removing timing belt, set key (2) on crankshaft in position
as shown in figure by turning crankshaft. This is to prevent inter-
ference between valves and piston when reinstalling camshaft.
5) Remove camshaft timing belt pulley (1).
Lock camshaft (2) with a proper size rod (3) inserted into hole (10
mm, 0.39 in.) in it as shown and then loosen camshaft timing belt
pulley bolt.
NOTE:
Mating surfaces of cylinder head and cover must not be
damaged in this work. So, put clean shop cloth (4) between
rod and mating surfaces, and use care not to bump rod
against mating surfaces hard when loosening bolt.

Don’t apply force
6A-16 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
6) Remove camshaft housings from cylinder head.
7) Remove camshaft from cylinder head.
8) Remove valve lash adjuster from cylinder head.
NOTE:

Never disassemble hydraulic valve lash adjuster.

Don’t apply force to body of adjuster, for oil in high pres-
sure chamber in adjuster will leak.

Immerse removed adjuster (2) in clean engine oil (1) and
keep it there till reinstalling it so as to prevent oil leakage.
If it is left in air, place it with its bucket body facing down.
Don’t place on its side or with bucket body facing up.

ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE) 6A-17
INSPECTION
Camshaft journal wear:

Check camshaft journals and camshaft housings for pitting,
scratches, wear or damage.
If any malcondition is found, replace camshaft or cylinder head
with housing. Never replace cylinder head without replacing
housings.
Check clearance by using gaging plastic (1). The procedure is as
follows.
1) Clean housings and camshaft journals.
2) Make sure that all valve lash adjusters are removed and install
camshaft to cylinder head.
3) Place a piece of gaging plastic the full width of journal of cam-
shaft (parallel to camshaft).
4) Install housings as outlined on the following page and evenly
torque housing bolts to specified torque. Housings MUST be
torqued to specification in order to assure proper reading of
camshaft journal clearance.
NOTE:
Do not rotate camshaft while gaging plastic is installed.
5) Remove housing, and using scale (2) on gaging plastic envel-
op, measure gaging plastic width at its widest point.
JournalStandardLimitJournal
clearance0.040 – 0.082 mm
(0.0016 – 0.0032 in.)0.12 mm
(0.0047 in.)
If measured camshaft journal clearance exceeds limit, mea-
sure journal (housing) bore and outside diameter of camshaft
journal. Replace camshaft or cylinder head assembly which-
ever the difference from specification is greater.
Item
Standard
Camshaft journalNo.126.000 – 26.021 mm
(1.0236 – 1.0244 in.)
j
bore dia.No.2 &
No.330.000 – 30.021 mm
(1.1811 – 1.1819 in.)
Camshaft journalNo.125.939 – 25.960 mm
(1.0212 – 1.0220 in.)
j
O.D.No.2 &
No.329.939 – 29.960 mm
(1.1787 – 1.1795 in.)

Indicates position from timing belt
side. Install in numerical order
starting from timing belt side.

Indicates direction of housing.
Install so that arrow is directed
toward timing belt side.
6A-18 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
INSTALLATION
1) Before installing valve lash adjuster to cylinder head, fill oil pas-
sage of cylinder head (1) with engine oil according to the follow-
ing procedure.
Pour engine oil through camshaft journal oil holes (2) and check
that oil comes out from oil holes in sliding part of valve lash ad-
juster.
2) Install lash adjuster to cylinder head.
Apply engine oil around valve lash adjuster and then install it to
cylinder head.
3) Install camshaft to cylinder head.
After applying engine oil to camshaft journal and all around cam,
set camshaft to cylinder head so that camshaft timing belt pulley
pin hole (1) in camshaft is at lower position.
4) Install camshaft housing to camshaft and cylinder head.

Apply engine oil to sliding surface of each housing against
camshaft journal.

Apply sealant to mating surface of No.1 and No.3 housings
which will mate with cylinder head.
“A”: Sealant 99000-31110

Embossed marks are provided on each camshaft housing, in-
dicating position and direction for installation.
Install housing as indicated by these marks.