Cam timing SUZUKI SWIFT 2005 2.G Service User Guide

Downloaded from www.Manualslib.com manuals search engine Engine Mechanical: 1D-2
Camshaft Position Control (VVT Variable Valve Timing) System DescriptionS7RS0B1401002
System Description
The VVT system is an electronic control system which continuously vary and optimize the intake valve timing in
response to the engine operating condition.
The optimized intake valve timing produce such an air intake with high efficiency that both the higher power generation
and lower fuel consumption can be attained in the whole engine speed range from low to high. In the area of the
average engine load, low emission of nitrogen oxides (NOx) and high fuel efficiency can also be attained by making
the valve opening overlap between the intake and exhaust valves longer.
For the brief of the system operation, the intake valve timing is varied by the cam timing sprocket (1) which varies the
rotational phase between the intake camshaft (3) and sprocket . The rotor (2) in the cam timing sprocket is actuated by
switching or adjusting the hydraulic pressure applied to the chambers for the timing advancing (7) and/or retarding (6).
To switch or adjust the hydraulic pressure appropriately, ECM operates the oil control valve (12) with detecting the
engine speed, intake air value, throttle opening, engine coolant temperature and camshaft position (angle).
1
4
5
13
10
89
2
7
6
12
11
3
14
60 (variable angle)
Most retarded timing
Most advanced timing
Exhaust valve Intake valve
Crank angle
Overlap of valves
Valve lift
I3RH0B140002-01
4. Oil passage to chamber for timing retarding 8. Oil filter10. Oil pan 13. Oil return
5. Oil passage to chamber for timing advancing 9. Oil pump11. Control signal from ECM 14. Oil flow

Downloaded from www.Manualslib.com manuals search engine 1D-3 Engine Mechanical:
Oil Control Valve
The oil control valve switches and adjusts the hydraulic
pressure applied to the cam timing sprocket by moving
the spool valve (1) according to the duty pulse signals
output from the ECM. By this operation, the intake valve
timing is varied continuously. Signals output from the
ECM are the duty pulse of about 240 Hz.
Cam Timing Sprocket
The cam timing sprocket is equipped with the chambers
for timing advancing (2) and retarding (3) which are
separated by the rotor (5). The rotor rotates receiving the
hydraulic pressure applied to both the chambers. The
sprocket (1) is installed on the housing (4) and the rotor
is secured on the intake camshaft by fastening the bolts.
Therefore, the actuation of the rotor makes the phase
difference between the sprocket and intake camshaft.
Timing Advancing
When the duty ratio of the signal output from the ECM is
heavy, the spool valve (4) of the oil control valve moves
to the left (opposite direction against the coil (5)). By this
spool valve movement, the pressurized oil (1) is led into
the chambers for timing advancing and the oil in the
chambers for timing retarding is drained. This operations
actuate the rotor (3) and result in the advanced timing of
the intake valve. Timing Holding
When the duty ratio of the si
gnal output from the ECM
shows that of holding, the sp ool valve of the oil control
valve is located at hold posi tion. Because this condition
generates no oil pressure changes in both chambers,
the rotor is fixed at a target position.
Timing Retarding
When the duty ratio of the sig nal output from the ECM is
light, the spool valve of the o il control valve moves to the
right (head for the coil). By this spool valve movement,
the pressurized oil is led into the chambers for timing
retarding and the oil in the chambers for timing
advancing is drained. This operations actuate the rotor
and result in the retarded timing of the intake valve.
6. Seal
1
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1 2
3
4
56
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2. Drain
12
5
4
3
I3RH0B140005-01
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I3RH0B140007-01

Downloaded from www.Manualslib.com manuals search engine 1D-7 Engine Mechanical:
Replacement of Shim1) Close the valve whose shim (2) is to be replaced by turning crankshaft, then tu rn tappet (3) till its cut
section (1) faces inside as shown in the figure.
2) Lift down the valve by turning crankshaft to 360° .
3) Hold tappet at that position using special tool as follows.
a) Remove its housing bolts.
b) Check housing No. and select special tool corresponding to housing No., referring to
“Special tool selection table”.
Special tool selection table
c) Hold down the tappet so as not to contact the shim by installing special tool on camshaft
housing with housing bolt (1) tighten housing
bolts by hand.
Special tool
(A): 09916–67020
(A): 09916–67021 4) Turn camshaft by approximately 90
° clockwise and
remove shim (3).
WARNING!
Never put in the hand between camshaft and
tappet.

5) Using a micrometer (2), measure the thickness of the removed shim (1), and determine replacement
shim by calculating the thickness of new shim with
the following formula and table.
Shim thickness specification
Intake side:
A = B + C – 0.20 mm (0.008 in.)
Exhaust side:
A = B + C – 0.30 mm (0.012 in.)
A: Thickness of new shim
B: Thickness of removed shim
C: Measured valve clearance
No. on camshaft
housing Embossed mark on
special tool
I2 IN2
I3, I4, I5 IN345
E2 EX2
E3, E4, E5 EX345
A: I: Intake side or E: Exhaust side
B: Position from timing chain side
C: Pointing to timing chain side
I2RH0B140006-01
I2RH0B140011-01
1. Special tool
2. Magnet
I6RS0B141028-01
I2RH0B140013-01
I2RH0B140014-01

Downloaded from www.Manualslib.com manuals search engine 1D-23 Engine Mechanical:
8) Install new O-ring (1) to oil gallery pipes No.2 (2) and
No.3 (3).
9) Install oil gallery pipes No.2 and No.3 to cylinder
head (4) and timing chain cover (5).
Tighten bolts to specified torque.
Tightening torque
Oil gallery pipe No.2 and No.3 bolt (a): 11 N·m (
1.1 kgf-m, 8.0 lb-ft)
10) Install water pump pulley. 11) Install cylinder head cover referring to “Cylinder Head Cover Removal and Installation”.
12) Install oil pan referring to “Oil Pan and Oil Pump
Strainer Removal and Installation in Section 1E”.
13) Install crankshaft pulley (1). Tighten bolt (2) to specified torque. To lock crankshaft pulley, use
special tool with it as shown in figure.
Special tool
(A): 09917–68221
Tightening torque
Crankshaft pulley bolt (a): 150 N·m (15.0 kgf-m,
108.5 lb-ft)
14) Install engine assembly to vehicle referring to “Engine Assembly Removal and Installation”.
Timing Chain Cover InspectionS7RS0B1406014
Oil Seal
Check oil seal lip for fault or other damage. Replace as
necessary. Timing Chain Cover
Inspect strainer (1) of oil passage for driving intake cam
timing sprocket assembly (VVT actuator).
If clog or foreign matter exists, clean strainer.
Oil Control Valve Removal and InstallationS7RS0B1406015
Removal
Remove oil gallery pipe No.1
(1) and oil control valve (2)
from timing chain cover (3).
Installation
1) Install new O-ring (4) to oil control valve.
2) Install oil control valve to timing chain cover. Tighten nuts to specification.
Tightening torque
Oil control valve mounting nut (a): 11 N·m (1.1
kgf-m, 8.0 lb-ft)
3) Install oil gallery pipe No .1 with new copper washers
(5) to timing chain cover.
Tighten bolts to specification.
Tightening torque
Oil gallery pipe No.1 bolt (b): 30 N·m (3.0 kgf-m,
21.5 lb-ft)
(a)
(a) 1
2
3
4
5
I3RH0B140027-01
I2RH0B140056-01
1
I3RH0B140028-01
1
5
(b) 3
(a)
2 4
5
I3RM0A140027-01

Downloaded from www.Manualslib.com manuals search engine 1D-25 Engine Mechanical:
Timing Chain and Chain Tensioner Removal
and Installation
S7RS0B1406018
Removal
CAUTION!
After timing chain is removed, never turn
crankshaft and camshafts independently
more than its allowable turning range
described in “Installation”.
If turned, interferen ce may occur between
piston and valves and valves themselves,
and parts related to piston and valves may be
damaged.

1) Remove timing chain cover referring to “Timing Chain Cover Removal and Installation”.
2) By turning crankshaft, align camshafts and crankshaft at specific position as follows.
a) Align both intake and exhaust camshaft timing sprocket marks (1) with notches (2) of cylinder
head respectively.
b) Align crankshaft sprocket key (3) with notch of cylinder block (4).
Position crankshaft sprocke t key (3) at upside of
crankshaft as shown in figure.
3) Remove timing chain tensioner adjuster assembly (5).
4) Remove timing chain tensioner (6).
5) Remove timing chain No.1 guide (7).
6) Remove timing chain (8) with crankshaft timing sprocket (9). Installation
CAUTION!
After timing chain is removed, never turn
crankshaft and camshafts independently
more than such an extent (“a”, “b”) as shown
in figure.
If turned, interferen
ce may occur between
piston and valves and valves themselves,
and parts related to piston and valves may be
damaged.

1) Check that match marks (1) on intake and exhaust camshaft timing sprockets are in match with notches
(2) on cylinder head as shown in figure.
2) Set key (3) and turn crankshaft to position key on upside of crankshaft.
3
4
1
1
2
5
67
8
9
I3RH0B140032-01
“a”: 90 °4. Camshaft (IN and EX) allowable turning range.
By marks on camshaft timing sprocket within 15 ° from notches
on cylinder head on both right and left.
“b”: 15 °5. Crankshaft allowable turning range.
By key on crankshaft, within 90 ° from top on both right and left.
“a”
“b”
“b”“b”
“b”
“a”
1
12
4
3
5
I4RS0A140021-01

Downloaded from www.Manualslib.com manuals search engine Engine Mechanical: 1D-26
3) Install timing chain by aligning dark blue plate (1) of timing chain and triangle mark (2) on camshaft
timing sprocket as shown in figure.
4) Fit crankshaft timing sprocket to timing chain by aligning gold plate (3) of timing chain and circle mark
(4) on crankshaft timing sprocket. Then install
crankshaft timing sprocket fitted with chain to
crankshaft.
5) Apply engine oil to sliding surface of timing chain No.1 guide (1) and install it as shown in figure.
Tighten guide bolts to specified torque.
Tightening torque
Timing chain No.1 guide bolt (a): 9 N·m (0.9 kgf-
m, 6.5 lb-ft) 6) Apply engine oil to sliding surface of chain tensioner
(1) and install chain tensioner and spacer.
Tighten tensioner bolt to specified torque.
Tightening torque
Timing chain tensioner bolt (a): 25 N·m (2.5 kgf-
m, 18.0 lb-ft)
7) Check that match marks (2) on intake and exhaust camshaft timing sprockets are in match with dark
blue plates (1) of timing chain and match mark (4) on
crankshaft timing sprocket is in match with gold plate
(3) of timing chain.
[A]: View C
34
1
1
2
2
Approx. Approx.
C[A]
I6RS0C140016-02
I2RH0B140062-01
[A]: View C
I2RH0B140063-01
34
1
1
2
2
Approx. Approx.
C[A]
I6RS0C140016-02

Downloaded from www.Manualslib.com manuals search engine 1D-27 Engine Mechanical:
8) Screw in plunger (1) by turning body (2) in arrow direction and install a reta iner (3) (wire) to hold
plunger in place.
9) Install timing chain tensioner adjuster assembly (1) with a retainer (2).
Tighten adjuster bolts to specified torque and then
remove a retainer from chain tensioner adjuster
assembly.
Tightening torque
Timing chain tensioner adjuster bolt (a): 11 N·m
(1.1 kgf-m, 8.0 lb-ft)
10) Apply engine oil to timing chain, and then turn crankshaft clockwise by 2 revolutions and check that
match marks (1) are at the following specific
positions.
• Intake and exhaust camshaft timing sprockets makes (1) are in match with notches (2) on
cylinder head.
• Crankshaft sprocket key (3) is in match with notch of cylinder block (4).
• Crankshaft sprocket key (3) is on upside of crankshaft as shown in figure. 11) Install timing chain cover referring to “Timing Chain
Cover Removal and Installation”.
Timing Chain and Chain Tensioner InspectionS7RS0B1406019
Timing Chain No.1 Guide
Check shoe (1) for wear or damage.
Timing Chain Tensioner
Check shoe (1) for wear or damage.
I2RH0B140065-01
I2RH0B140066-01
1
1
2
3 4
I6RS0C140017-01
I2RH0B140068-01
I2RH0B140069-01

Downloaded from www.Manualslib.com manuals search engine Engine Mechanical: 1D-28
Crankshaft Timing Sprocket
Check teeth of sprocket for wear or damage.Timing Chain
Check timing chain for wear or damage.
Timing Chain Tensioner Adjuster
Check that tooth surface (1) are free from damage.
Camshaft, Tappet and Shim ComponentsS7RS0B1406020
I2RH0B140070-01
I2RH01140077-01
I2RH0B140071-01
I6RS0C140018-01
1. Intake camshaft
5. Shim
: Shim No. on it faces tappet side. 9. Camshaft bearing
: Install a bearing half with some holes to upper side of intake
camshaft No.1 bearing.
2. Intake camshaft sprocket assembly 6. Tappet : 60 N⋅m (6.0 kgf-m, 43.5 lb-ft)
3. Intake camshaft sprocket bolt 7. Camshaft housing : Tighten 5 N⋅m (0.5 kgf-m, 4.0 lb-ft) and 11 N ⋅m (1.1 kgf-m,
8.0 lb-ft) by the specified procedure.
4. Exhaust camshaft 8. Camshaft housing bolt : Apply engine oil to sliding surface of each part.

Downloaded from www.Manualslib.com manuals search engine 1D-29 Engine Mechanical:
Camshaft, Tappet and Shim Removal and
Installation
S7RS0B1406021
CAUTION!
• Keep working table, tools and hands clean while overhauling.
• Use special care to handle aluminum parts so as not to damage them.
• Do not expose removed parts to dust. Keep them always clean.

Removal
1) Remove timing chain cover referring to “Timing Chain Cover Removal and Installation”.
2) Remove timing chain referring to “Timing Chain and Chain Tensioner Removal and Installation”.
3) With hexagonal section (1) of intake camshaft (2) held stationary with spanner or the like, loosen
mounting bolt of intake cam timing sprocket
assembly (3) and remove it.
CAUTION!
Never attempt to loosen mounting bolt with
intake cam timing sprocket assembly held
stationary. Failure to fo llow this could result
in damage to lock pin.
Do not loosen bolt “a” because intake cam
timing sprocket assembly is not serviceable.

4) Loosen camshaft housing bolts in such order as indicated in the figure and remove them.
5) Remove camshaft housings.
6) Remove intake and exhaust camshafts.
7) Remove camshaft bearing (1).
8) Remove tappets (2) with shims (1).
3“a”
1
2
I3RM0A140030-01
“12”“13” “20”“21”
“16”“17” “8” “9”
“2”
“5” “3”
“4”
“1”
“10”“11”“18”
“19” “14” “15” “6” “7”
I3RM0A140031-01
1
I3RH0B140039-01
I2RH0B140074-01

Downloaded from www.Manualslib.com manuals search engine Engine Mechanical: 1D-30
Installation1) Install tappets and shims to cylinder head. Apply engine oil around tappet and then install it to
cylinder head.
NOTE
When installing shim, make sure to direct
shim No. side toward tappet.

2) Install camshaft bearing (1) to cylinder head.
CAUTION!
Do not apply engine oil to camshaft bearing
back.
Only a upper half bearing of intake camshaft
bearing No.1 has some holes. Other
bearings.

3) Install intake camshaft (1) and exhaust camshaft (2). Align knock pin (3) and match mark (4) with notches
(5) as shown in figure.
NOTE
Before installing camshafts, turn crankshaft
until key position faces upward.
Refer to “Timing Chain and Chain Tensioner
Removal and Installation”.

4) Apply engine oil to sliding surface of each camshaft and camshaft journal then install them as shown in
figure.
5) Install camshaft housing pins (1) as shown in figure.
6) Check position of camshaft housings. Embossed marks are provided on each camshaft
housing, indicating position and direction for
installation. Install housings as indicated by these
marks.I2RH0B140075-01
1
I3RH0B140039-01
“a”: Approx. 30 °
A: I: Intake side or E: Exhaust side
B: Position from timing chain side
C: Pointing to timing chain side
1 2
3 4
5
“a”
I6RS0C140019-01
I3RM0A140033-01
I2RH0B140078-01