Mazda Engine SKYACTIV-G 2.5. Manual - part 8

MECHANICAL 

01-10–16

Electric Variable Valve Timing Actuator, Hydraulic Variable Valve Timing Actuator Disassembly Note

1. Hold the camshaft using a wrench on the cast 

hexagon and loosen the actuator installation bolt.

Camshaft Cap Disassembly Note

1. Before removing the camshaft cap, Inspect the camshaft end play. (See 01-10-30 CAMSHAFT INSPECTION.)

2. Loosen the camshaft cap installation bolts in two 

or three passes in the order shown in the figure 

and remove the camshaft caps.

Rocker Arm Disassembly Note

1. Keep the rocker arms in the order of removal to enable reassembly in their original positions.

HLA Disassembly Note

1. Keep the HLAs in the order of removal to enable reassembly in their original positions.

Cylinder Head Disassembly Note

1. Loosen the cylinder head installation bolts in two 

or three passes in the order shown in the figure 

and remove them.

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I2

I3

I4

I5

E2

E5

E4

E3

3

5

1

2

4

3

4

6

2

1

5

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2

6

8

4

1

5

9

7

10

ENGINE 
FRONT

3

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MECHANICAL 

01-10–17

01-10

CYLINDER HEAD DISASSEMBLY (II)

id011000500500

1. Disassemble in the order indicated in the table.

.

3

1

2

R

R

7

SST

SST

5

4

6

9

8

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1

Thermostat cover

2

Thermostat

3

Water outlet

4

Valve keeper

(See 01-10-18 Valve Keeper Disassembly Note.)

5

Upper valve spring seat

6

Valve  spring

7

Valve

8

Valve seal

(See 01-10-18 Valve Seal Disassembly Note.)

9

Lower valve spring seat

MECHANICAL 

01-10–18

Valve Keeper Disassembly Note

1. Remove the valve keeper using the 

SSTs.

Valve Seal Disassembly Note

1. Remove the valve seal using the 

SST or pliers.

End Of Sie

49 0636 100B

49 B012 0A2A

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49 S120 170

VALVE SEAL

VALVE GUIDE

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VALVE SEAL

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MECHANICAL 

01-10–19

01-10

CYLINDER BLOCK DISASSEMBLY (I)

id011000500600

Caution

• Do not disassemble the oil pump, water pump and balancer unit because it is a precision unit.

1. Disassemble in the order indicated in the table.

.

R

R

R

R

SST

9

7

6

5

5

4

3

8

1

2

R

SST

3

R

ATX

MTX

10

11

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1

Knock sensor (KS)

2

Oil separator

3

Dual-mass flywheel (MTX)/ drive plate (ATX) 

installation bolt

(See 01-10-20 Dual-mass Flywheel (MTX)/ Drive 

Plate (ATX) Installation Bolt Disassembly Note.)

4

Backing plate (ATX)

5

Dual-mass flywheel (MTX), drive plate (ATX)

(See 01-10-21 Dual-mass Flywheel Disassembly 

Note (MTX).)

6

End plate

7

Rear oil seal

(See 01-10-21 Rear Oil Seal Disassembly Note.)

8

Water pump

9

Oil  strainer

10

Oil pump

11

Balancer unit