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Mazda CX 7. Manual - part 101

MECHANICAL [L3 WITH TC]

01-10–7

01-10

2007 Mazda CX-7 Workshop Manual (1871–1U–06B)

Revised 3/2007 (Ref. No. R051/07)

23. Carefully apply adhesive agent (Loctite 518 or

962) to the area indicated in the figure so that it
does not leak into the sliding part.

Thickness

1.0 mm {0.039 in}

24. Install the camshaft caps and temporarily tighten

the camshaft cap bolts evenly in two or three
passes, and then tighten the camshaft cap bolts
in two passes, using the following two steps and
in the order shown in the figure.

Tightening procedure

1. 5.0— 9.0 N·m {51— 91 kgf·cm, 45— 79

in·lbf}

2. 14.0— 17.0 N·m {1.5— 1.7 kgf·m, 10.4—

12.5 ft·lbf

25. Install the OCV. (See01-10-29 OIL CONTROL

VALVE (OCV) REMOVAL/INSTALLATION[L3
WITH TC].)

26. Install a new washer.

27. Install the exhaust camshaft sprocket.

Caution

• Do not tighten the camshaft sprocket

installation bolt at this stage. Verify the
valve timing before performing the bolt
tightening.

SEALANT

INTAKE REAR CAMSHAFT CAP

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No.1

No.2

No.3

No.4

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EXHAUST
CAMSHAFT
SPROCKET

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MECHANICAL [L3 WITH TC]

2007 Mazda CX-7 Workshop Manual (1871–1U–06B)

01-10–8

28. Install the SST on the camshaft as shown in the

figure.

29. Remove the installation bolt for the engine front

cover upper blind plug (M6 X 1.0 length 25—
35mm {0.99— 1.3 in}), and apply tension to the
timing chain.

30. Rotate the crankshaft clockwise and verify that

the No.1 cylinder is at TDC of the compression
stroke. (The position crank weight contacts the
SST.)

31. Fix the exhaust camshaft using a wrench on the

cast hexagon, and tighten the sprocket installation
bolt.

Tightening torque

69— 75 N·m {7.1— 7.6 kgf·m, 51— 55 ft·lbf}

32. Remove the SST from the camshaft.
33. Remove the SST installed in the cylinder block

lower blind plug hole.

34. Rotate the crankshaft clockwise two turns and

inspect the valve timing.

• If it is not aligned, repeat the procedure.

35. Apply the silicone sealant and install the engine

front cover upper blind plug.

Tightening torque

8.0— 11.5 N·m {82— 117 kgf·cm, 71— 101

in·lbf}

36. Install the cylinder block lower blind plug.

Tightening torque

18— 22 N·m {1.9— 2.2 kgf·m, 14— 16 ft·lbf}

37. Install a new engine front cover lower blind plug.

Tightening torque

10.0— 14.0 N·m {102— 142 kgf·cm, 89— 123

in·lbf}

38. Install the drive belt. (See01-10-3 DRIVE BELT

REMOVAL/INSTALLATION[L3 WITH TC].)

39. Install the cylinder head cover. (See01-10-10

TIMING CHAIN REMOVAL/INSTALLATION[L3
WITH TC].)

303-1061

(49 UN30 310610)

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BLIND
PLUG

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BLIND
PLUG

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ENGINE FRONT
COVER LOWER
BLIND PLUG

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MECHANICAL [L3 WITH TC]

01-10–9

01-10

40. Install the ventilation hose.
41. Connect the wiring harness.
42. Install the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
43. Install the high pressure fuel pump. (See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/

INSTALLATION[L3 WITH TC].)

44. Install the charge air cooler. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
45. Install the splash shield (RH).
46. Connect the negative battery cable.

End Of Sie

COMPRESSION INSPECTION[L3 WITH TC]

id011039800300

Warning

• Hot engines can cause severe burns. Be careful not to burn yourself during removal/installation of

each component.

• Fuel vapor is hazardous. It can very easily ignite, causing death, serious injury, or damage. Always

keep sparks and flames away from fuel.

1. Verify that the battery is completely charged. (See01-17-2 BATTERY INSPECTION[L3 WITH TC].)
2. Warm up the engine.

Warning

• Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can easily ignite

and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent
this, always perform the Fuel Line Safety Procedure. (See01-14-4 BEFORE REPAIR
PROCEDURE[L3 WITH TC].)

3. Remove the charge air cooler.
4. Remove the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
5. Remove all the spark plugs. (See01-18-3 SPARK PLUG REMOVAL/INSTALLATION[L3 WITH TC])
6. Remove the fuel pump relay. (See01-14-4 BEFORE REPAIR PROCEDURE[L3 WITH TC].)
7. Remove the fuel injector relay.
8. Measure the compression pressure using the following procedure.

(1) Press the compression gauge into the spark

plug hole.

(2) Fully open the throttle valve.
(3) Crank the engine and measure the

compression pressure.

Compression

Standard: 1,280 kPa {13.1 kgf/cm

, 185.65

psi} [250rpm]

Minimum: 896 kPa {9.14 kgf/cm

, 129.96 psi}

[250rpm]

Maximum difference between cylinders:

196.1 kPa {2.0 kgf/cm

, 28.5 psi}

(4) Perform Steps (1) to (3) for all cylinders.
(5) If it is less than the minimum specification, or there is a cylinder with a compression value that differs from

that of other cylinders by 196.1 kPa or more {2.0 kgf/cm

, 28.5 psi}, add a small quantity of engine oil

through the spark plug hole and perform Steps (1) to (3).

• If the pressure increases by adding the engine oil, the piston ring or the cylinder surface is worn, or they

are damaged. Perform overhaul servicing.

• If the pressure does not increase, valve seizure, valve attachment failure, or pressure leakage from the

cylinder head gasket might be occurring. Perform overhaul servicing.

9. Install the fuel injector relay.

10. Install the fuel pump relay. (See01-14-4 BEFORE REPAIR PROCEDURE[L3 WITH TC].)
11. Install the spark plugs. (See01-18-3 SPARK PLUG REMOVAL/INSTALLATION[L3 WITH TC])
12. Install the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
13. Install the charge air cooler.

End Of Sie

WM: TIMING CHAIN

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MECHANICAL [L3 WITH TC]

01-10–10

TIMING CHAIN REMOVAL/INSTALLATION[L3 WITH TC]

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1. Disconnect the negative battery cable.
2. Remove the under cover.
3. Remove the splash shield.
4. Remove the charge air cooler. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
5. Remove the high pressure fuel pump. (See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/

INSTALLATION[L3 WITH TC].)

6. Remove the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
7. Disconnect the wiring harness.
8. Remove the ventilation hose.
9. Remove the drive belt. (See01-10-3 DRIVE BELT REMOVAL/INSTALLATION[L3 WITH TC].)

10. Remove the crankshaft position (CKP) sensor. (See01-40-42 CRANKSHAFT POSITION (CKP) SENSOR

REMOVAL/INSTALLATION[L3 WITH TC].)

11. Remove the P/S oil pump with the hoses and pipes still connected. (See06-14-21 POWER STEERING OIL

PUMP REMOVAL/INSTALLATION.)

Note

• Position and secure the P/S oil pump out of the way with a rope or wire.

12. Remove the bracket shown in the figure, and

place the power steering pressure hose outside of
the vehicle.

13. Remove in the order indicated in the figure.
14. Install in the reverse order of removal.
15. Start the engine and inspect and adjust the

following:
(1) Engine oil amount (See01-11-3 ENGINE OIL

LEVEL INSPECTION[L3 WITH TC].)

(2) Runout and contact of pulley and belt.
(3) Ignition timing, idle speed, and idle mixture

(CO and HC) verification (See01-10-35
ENGINE TUNE-UP[L3 WITH TC].)

FRONT

STEERING GEAR

POWER STEERING
PRESSURE HOSE

7.8—10.8
{80—110,
70—95 }

m {kgf

cm, in

lbf}

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Content .. 99 100 101 102 ..