Mazda CX 7. Manual — part 100
MECHANICAL [L3 WITH TC]
01-10–3
01-10
End Of Sie
WM: DRIVE BELT
DRIVE BELT INSPECTION[L3 WITH TC]
id011039801500
Note
• Drive belt deflection/tension inspection is not necessary because of the use of the drive belt auto
tensioner.
1. Verify that the drive belt auto tensioner indicator mark does not exceed the limit.
• If it exceeds the limit, replace the drive belt.
(See01-10-3 DRIVE BELT REMOVAL/
INSTALLATION[L3 WITH TC].)
End Of Sie
DRIVE BELT REMOVAL/INSTALLATION[L3 WITH TC]
id011039801600
1. Remove the splash shield (RH).
2. Rotate the drive belt auto tensioner in the
direction shown in the figure and remove the drive
belt.
3. Install the drive belt.
4. Verify that the drive belt auto tensioner indicator
mark does not exceed the limit. (See01-10-3
DRIVE BELT INSPECTION[L3 WITH TC].)
5. Install the splash shield (RH).
End Of Sie
WM: DRIVE BELT AUTO TENSIONER
NORMAL
MALFUNCTION
INDICATOR
MARK
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acxuuw00000136
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MECHANICAL [L3 WITH TC]
01-10–4
DRIVE BELT AUTO TENSIONER INSPECTION[L3 WITH TC]
id011039801700
1. Remove the drive belt. (See01-10-3 DRIVE BELT REMOVAL/INSTALLATION[L3 WITH TC].)
2. Verify that the drive belt auto tensioner moves
smoothly in the operational direction.
• Replace the drive belt auto tensioner if
necessary.
3. Rotate the drive belt auto tensioner pulley by
hand and verify that it rotates smoothly.
• Replace the drive belt auto tensioner if
necessary.
4. Install the drive belt. (See01-10-3 DRIVE BELT
REMOVAL/INSTALLATION[L3 WITH TC].)
End Of Sie
WM: ENGINE COMPLETE
VALVE CLEARANCE INSPECTION/ADJUSTMENT[L3 WITH TC]
id011039800200
Valve Clearance Inspection
1. Disconnect the negative battery cable.
2. Remove the splash shield (RH).
3. Remove the charge air cooler. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
4. Remove the high pressure fuel pump. (See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)
5. Remove the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
6. Disconnect the wiring harness.
7. Remove the ventilation hose.
8. Remove the cylinder head cover. (See01-10-10 TIMING CHAIN REMOVAL/INSTALLATION[L3 WITH TC].)
9. Measure the valve clearance.
(1) Rotate the crankshaft clockwise so that the No.1 cylinder is at TDC of the compression stroke.
(2) Measure the valve clearance of location A
shown in the figure.
Standard valve clearance [Engine cold]
IN: 0.22— 0.28 mm {0.0087— 0.011 in}
EX: 0.27— 0.33 mm {0.011— 0.012 in}
(3) If it is not within the specification, replace the
tappet and adjust the valve clearance to the
median value of the standard.
Note
• Make sure to note down the measured
values for choosing the suitable replacement
tappets.
(4) Rotate the crankshaft clockwise 360
° so that the No.4 cylinder is at TDC of the compression stroke.
(5) Measure the valve clearance of location B shown in the figure.
Standard valve clearance [Engine cold]
IN: 0.22— 0.28 mm {0.0087— 0.011 in}
EX: 0.27— 0.33 mm {0.011— 0.012 in}
(6) If not within the specification, replace the tappet and adjust the valve clearance to the median value of the
standard.
10. Install the cylinder head cover. (See01-10-10 TIMING CHAIN REMOVAL/INSTALLATION[L3 WITH TC].)
11. Install the ventilation hose.
12. Connect the wiring harness.
13. Install the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
14. Install the high pressure fuel pump. (See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)
15. Install the charge air cooler. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
16. Install the splash shield (RH).
17. Connect the negative battery cable.
DRIVE BELT
AUTO TENSIONER
acxuuw00000137
No.1
No.2
No.3
No.4
A
B
A
B
A
EX
IN
A
B
B
acxuuw00000156
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MECHANICAL [L3 WITH TC]
01-10–5
01-10
Valve Clearance Adjustment
1. Disconnect the negative battery cable.
2. Remove the splash shield (RH).
3. Remove the charge air cooler. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
4. Remove the high pressure fuel pump. (See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)
5. Remove the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
6. Disconnect the wiring harness.
7. Remove the ventilation hose.
8. Remove the cylinder head cover. (See01-10-10 TIMING CHAIN REMOVAL/INSTALLATION[L3 WITH TC].)
9. Remove the drive belt. (See01-10-3 DRIVE BELT REMOVAL/INSTALLATION[L3 WITH TC].)
10. Remove the engine front cover lower blind plug.
11. Remove the engine front cover upper blind plug.
12. Remove the cylinder block lower blind plug, and
install the SST.
13. Rotate the crankshaft in the direction of the
engine rotation so that the No.1 piston is at TDC
of the compression stroke. (Until the crank weight
contacts SST and stops.)
14. Release the tension on the timing chain shown in
the figure.
UPPER
BLIND
PLUG
LOWER BLIND
PLUG
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303-507
acxuuw00000541
BOLT(M6 x 1.0)
3
2
1
acxuuw00000159
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MECHANICAL [L3 WITH TC]
01-10–6
(1) Using a suitable screwdriver or equivalent tool, unlock the chain tensioner ratchet.
(2) Rotate the exhaust camshaft clockwise using a suitable wrench on the cast hexagon and loosen the
tension on the timing chain.
(3) Using a suitable bolt (M6 X 1.0 length
25mm— 35mm {0.99— 1.3 in}) at the engine
front cover upper blind plug, secure the
tensioner arm at the position where the
tension is released.
15. Fix the exhaust camshaft using a wrench on the
cast hexagon, and loosen the camshaft sprocket
installation bolt.
16. Remove the installation bolt and remove the
exhaust camshaft sprocket.
17. Remove the oil control valve (OCV). (See01-10-
29 OIL CONTROL VALVE (OCV) REMOVAL/
INSTALLATION[L3 WITH TC].)
18. Loosen the camshaft cap bolts in two or three
passes in the order shown in the figure and
remove the camshaft cap.
Note
• The camshaft caps are to be kept ordered
for correct reassembly in their original
positions. Do not mix the caps.
19. Remove the camshafts for the intake and exhaust
sides.
20. Remove the tappet.
21. Install an appropriate tappet based on the results
of the valve clearance inspection.
Selected tappet = Removed tappet thickness + Measured valve clearance - Standard valve clearance
Standard valve clearance [Engine cold]
IN: 0.22— 0.28 mm {0.0087— 0.011 in}
EX: 0.27— 0.33 mm {0.011— 0.012 in}
22. Install the camshaft with No.1 cylinder cam aligned at TDC of the compression stroke.
RIB
RIB
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acxuuw00000161
EXHAUST
CAMSHAFT
SPROCKET
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No.1
No.2
No.3
No.4
EX
IN
5
4
3
1
2
5
6
3
1
4
2
acxuuw00000163
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