seat SUZUKI SWIFT 2000 1.G SF310 Service User Guide

6A-22 ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE)
Valve Springs

Referring to data given below, check to be sure that each spring
is in sound condition, free of any evidence of breakage or weak-
ening. Remember, weakened valve springs can cause chatter,
not to mention possibility of reducing power output due to gas
leakage caused by decreased seating pressure.
Item
StandardLimit
Valve spring
free length42.29 mm
(1.6649 in.)41.0 mm
1.6142 in.)
Valve spring
preload
209 – 235 N
(20.9 – 23.5 kg) at
32.6 mm (46.1 –
51.8 lb at 1.28 in.)187 N (18.7 kg)
at 32.6 mm
(41.2 lb at 1.28 in.)

Spring squareness:
Use a square and surface plate to check each spring for square-
ness in terms of clearance between end of valve spring and
square. Valve spring found to exhibit a larger clearance than limit
must be replaced.
Valve spring
2 0 mm (0 079 in )g
squareness limit.2.0 mm (0.079 in.)

: Do not reuse
1. Valve cotters
2. Valve spring retainer
3. Valve spring:
be sure to position
spring in place with its
bottom end (small-pitch
end) facing the bottom
(valve spring seat side).
4. Valve stem seal
5. Valve spring seat
6. Exhaust valve
7. Intake valve
8. Cylinder head bolt
9. Camshaft housing bolt10. Camshaft housing:
Apply sealant to mating surface of
No.1 and No.6 housings.
11. Valve guide
12. Oil venturi plug
13. Cylinder head gasket:
“TOP” mark provided on gasket comes to
crankshaft pulley side, facing up
(toward cylinder head side).
14. Dowel pin
: Tightening Torque
: Apply engine oil to sliding
: surfaces of each part.
3.5 N.m (0.35 kg-m)
ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-41
VALVES AND CYLINDER HEAD
REMOVAL
1) Relieve fuel pressure according to procedure described in Sec-
tion 6.
2) Disconnect negative cable at battery.
3) Drain cooling system.
4) Remove air cleaner outlet hose as previously outlined.

6A1-44 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)
DISASSEMBLY
1) For ease in servicing cylinder head, remove CMP sensor case,
intake manifold with throttle body and exhaust manifold from cyl-
inder head.
2) Remove rocker arms and washers by pulling its shaft out to
transmission side.
3) Using special tools (Valve lifter), compress valve springs and
then remove valve cotters (1) by using special tool (Forceps) as
shown.
Special Tool
(A): 09916-14510
(B): 09916-14910
(C): 09916-84511
4) Release special tool, and remove spring retainer and valve
spring.
5) Remove valve from combustion chamber side.
6) Remove valve stem oil seal (1) from valve guide, and then valve
spring seat (2).
NOTE:
Do not reuse oil seal once disassembled. Be sure to use
new oil seal when assembling.
7) Using special tool (Valve guide remover), drive valve guide out
from combustion chamber side to valve spring side.
Special Tool
(A): 09916-44910
NOTE:
Do not reuse valve guide once disassembled. Be sure to
use new valve guide (Oversize) when assembling.
8) Place disassembled parts except valve stem seal and valve
guide in order, so that they can be installed in their original posi-
tion.

6A1-46 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)

Inspect valve stem end face for pitting and wear. If pitting or wear
is found there, valve stem end may be resurfaced, but not so
much as to grind off its chamfer. When it is worn so much that its
chamfer is gone, replace valve.

Seating contact width:
Create contact pattern on each valve in the usual manner, i.e., by
giving uniform coat of marking compound to valve seat and by ro-
tatingly tapping seat with valve head. Valve lapper (tool used in
valve lapping) must be used.
Pattern produced on seating face of valve must be a continuous
ring without any break, and the width “a” of pattern must be within
specified range.
Standard seating width
revealed by contact
In1.1 – 1.3 mmrevealed by contact
pattern on valve faceEx(0.0433 – 0.0512 in.)

ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-47

Valve seat repair:
A valve seat (2) not producing a uniform contact with its valve or
showing width of seating contact that is out of specified range
must be repaired by regrinding or by cutting and regrinding and
finished by lapping.
1) EXHAUST VALVE SEAT: Use valve seat cutters (1) to make
two cuts as illustrated in figure. Two cutters must be used: the
first for making 15 angle, and the second for making 45
angle. The second cut must be made to produce desired seat
width.
Seat width for exhaust valve seat:
1.1 – 1.3 mm (0.0433 – 0.0512 in.)
2) INTAKE VALVE SEAT: Cutting sequence is the same as for ex-
haust valve seats.
Seat width for intake valve seat:
1.1 – 1.3 mm (0.0433 – 0.0512 in.)
3) VALVE LAPPING: Lap valve on seat in two steps, first with
coarse size lapping compound applied to face and the second
with fine-size compound, each time using valve lapper accord-
ing to usual lapping method.
Cylinder Head

Remove all carbon from combustion chambers.
NOTE:
Do not use any sharp-edged tool to scrape off carbon. Be
careful not to scuff or nick metal surfaces when decarbon-
ing. The same applies to valves and valve seats, too.

Check cylinder head for cracks in intake and exhaust ports, com-
bustion chambers, and head surface.

6A1-48 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)

Flatness of gasketed surface:
Using a straightedge and thickness gauge, check surface at a to-
tal of 6 locations. If distortion limit, given below, is exceeded, cor-
rect gasketed surface with a surface plate and abrasive paper of
about #400 (Waterproof silicon carbide abrasive paper): place
paper on and over surface plate, and rub gasketed surface
against paper to grind off high spots. Should this fail to reduce
thickness gauge readings to within limit, replace cylinder head.
Leakage of combustion gases from this gasketed joint is often
due to warped gasketed surface: such leakage results in reduced
power output.
Limit of distortion: 0.05 mm (0.002 in.)

Distortion of manifold seating faces:
Check seating faces of cylinder head for manifolds, using a
straightedge and thickness gauge, in order to determine whether
these faces should be corrected or cylinder head replaced.
Limit of distortion: 0.10 mm (0.004 in.)

ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-49
Valve Springs

Referring to data given below, check to be sure that each spring
is in sound condition, free of any evidence of breakage or weak-
ening. Remember, weakened valve springs can cause chatter,
not to mention possibility of reducing power output due to gas
leakage caused by decreased seating pressure.
Item
StandardLimit
Valve spring
free length36.83 mm
(1.4500 in.)35.67 mm
(1.4043 in.)
Valve spring
preload10.7 – 12.5 kg for
31.5 mm (23.6 –
27.5 lb / 1.24 in.)9.3 kg for 31.5 mm
(20.5 lb / 1.24 in.)

Spring squareness:
Use a square and surface plate to check each spring for square-
ness in terms of clearance between end of valve spring and
square. Valve springs found to exhibit a larger clearance than limit
given below must be replaced.
Valve spring squareness limit: 1.6 mm (0.063 in.)

“a”: Valve guide protrusion (11.5 mm)
6A1-50 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)
ASSEMBLY
1) Before installing valve guide into cylinder head, ream guide hole
with special tool (11 mm reamer) to remove burrs and make it
truly round.
Special Tool
(A): 09916-34542
(B): 09916-38210
2) Install valve guide to cylinder head.
Heat cylinder head uniformly at a temperature of 80 to 100C
(176 to 212F) so that head will not be distorted, and drive new
valve guide into hole with special tools. Drive in new valve guide
until special tool (Valve guide installer) contacts cylinder head.
After installing, make sure that valve guide protrudes by 11.5
mm (0.45 in.) from cylinder head.
Special Tool
(C): 09916-56011
(D): 09916-58210
NOTE:

Do not reuse valve guide once disassembled.
Install new valve guide (Oversize).

Intake and exhaust valve guides are identical.
Valve guide oversize: 0.03 mm (0.0012 in.)
Valve guide protrusion (In and Ex): 11.5 mm (0.45 in.)
3) Ream valve guide bore with special tool (5.5 mm reamer). After
reaming, clean bore.
Special Tool
(A): 09916-34542
(B): 09916-34550
4) Install valve spring seat to cylinder head.

A: Valve spring retainer side
B: Valve spring seat side
ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-51
5) Install new valve stem seal (1) to valve guide.
After applying engine oil to seal and spindle of special tool (Valve
guide installer handle), fit oil seal to spindle, and then install seal
to valve guide by pushing special tool by hand.
After installing, check to be sure that seal is properly fixed to
valve guide.
Special Tool
(A): 09917-98221
(B): 09916-58210
NOTE:

Do not reuse seal once disassembled. Be sure to install
new seal.

When installing, never tap or hit special tool with a ham-
mer or else. Install seal to guide only by pushing special
tool by hand. Tapping or hitting special tool may cause
damage to seal.
6) Install valve to valve guide.
Before installing valve to valve guide, apply engine oil to stem
seal, valve guide bore, and valve stem.
7) Install valve spring and spring retainer.
Each valve spring has top end (large-pitch (1) end) and bottom
end (small-pitch (2) end). Be sure to position spring in place with
its bottom end (small-pitch end) facing the bottom (valve spring
seat side).
8) Using special tools (Valve lifter), compress valve spring and fit
two valve cotters (1) into groove in valve stem.
Special Tool
(A): 09916-14510
(B): 09916-14910
(C): 09916-84511

2. Thermostat case
2. Thermometer
3. Heater
Upside
6B-8 ENGINE COOLING
4) Remove thermostat (1).
INSPECTION
1) Make sure that air bleed valve (1) of thermostat is clean.
Should this valve be clogged, engine would tend to overheat.
2) Check to make sure that valve seat is free from foreign matters
which would prevent valve from seating tight.
3) Check thermostatic movement of wax pellet as follows:
Immerse thermostat (1) in water, and heat water gradually.
Check that valve starts to open at specific temperature.
If valve starts to open at a temperature substantially below or
above specific temperature, thermostat unit should be re-
placed with a new one. Such a unit, if reused, will bring about
overcooling or overheating tendency.
INSTALLATION
1) When positioning thermostat on thermostat case, be sure to
position it so that air bleed valve comes uppermost and into the
recession of thermostat case.
2) Install thermostat cap to thermostat case. When installing cap,
align arrow marks on cap and case.
3) Fill cooling system.
4) Connect negative cable.
5) After installation, check each part for leakage.