Mazda Engine SKYACTIV-G 2.5. Manual - part 6

MECHANICAL 

01-10–8

1. Disassemble in the order indicated in the table.

.

R

1

A

3

A

2

13

17

16

15

14

24

18

19

21

20

SST

SST

12

4

5

22

23

9

10

8

7

11

6

SST

R

R

R

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1

Dipstick

2

Cylinder head cover

3

Oil shower pipe

4

Spark plug

5

Water pump pulley

(See 01-10-9 Water Pump Pulley Disassembly Note.)

MECHANICAL 

01-10–9

01-10

Water Pump Pulley Disassembly Note

Caution

• Be careful not to damage the belt groove and surface of the water pump pulley when using tools, 

otherwise it will cause wear, breakage, abnormal noise of the drive belt (stretch belt), damage to 

the pulley, and rust.

1. Align the water pump pulley hole with the water 

pump hole as shown in the figure.

2. Insert an appropriate bolt (length 

approx. 70 mm 

{2.8 in}) into the water pump hole as shown in the 

figure, and lock the water pump pulley against 

rotation.

3. Remove the water pump pulley.

4. Remove the bolt used for locking the water pump 

pulley against rotation.

6

Crankshaft pulley lock bolt 

(See 01-10-10 Crankshaft Pulley Lock Bolt 

Disassembly Note.)

7

Crankshaft pulley

8

Electric variable valve timing motor/driver

9

Oil  pan

(See 01-10-10 Oil Pan Disassembly Note.)

10 Engine front cover

(See 01-10-10 Engine Front Cover Disassembly 

Note.)

11 Front oil seal

(See 01-10-11 Front Oil Seal Disassembly Note.)

12 Chain guide (No.1)
13 Chain tensioner

 (See 01-10-11 Chain Tensioner Disassembly Note.)

14 Tensioner arm

15 Timing chain
16 Chain guide (No.2)
17 Crankshaft sprocket
18 Oil pump chain tensioner

(See 01-10-12 Oil Pump Chain Disassembly Note.)

19 Balancer shaft sprocket

(See 01-10-12 Oil Pump Chain Disassembly Note.)

20 Oil pump chain

(See 01-10-12 Oil Pump Chain Disassembly Note.)

21 Oil pump driven sprocket

(See 01-10-12 Oil Pump Chain Disassembly Note.)

22 Oil pump chain guide
23 Oil pump drive sprocket
24 Key

WATER PUMP PULLEY

WATER PUMP

HOLE

HOLE

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WATER PUMP PULLEY

BOLT

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MECHANICAL 

01-10–10

Crankshaft Pulley Lock Bolt Disassembly Note

1. Hold the crankshaft using the 

SST.

2. Remove the crankshaft pulley lock bolt.

Oil Pan Disassembly Note

1. Remove the oil pan using a separator tool.

Engine Front Cover Disassembly Note

1. Remove the engine front cover installation bolts.

2.

Using a screwdriver wrapped in a cloth, peel the 

sealant away a little at a time, and remove the 

engine front cover.

Caution

• Do not apply excessive force to the 

screwdriver. Otherwise, the engine front 

cover could be damaged.

• Be careful not to scratch or damage the 

seal surface. Otherwise, it could cause 

oil leakage.

49 E011 1A0

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CLOTH

CLOTH

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CLOTH

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MECHANICAL 

01-10–11

01-10

Front Oil Seal Disassembly Note

1. Remove the oil seal using a flathead screwdriver 

with the tip protected by a clean cloth.

Chain Tensioner Disassembly Note

1. While moving the exhaust camshaft back and 

forth in the direction of the arrow using a wrench 

on the cast hexagon, press down the link plate of 

the timing chain tensioner using a precision 

screwdriver and release the plunger lock.

Note

• When moving the exhaust camshaft back 

and forth, the timing chain pushes the 

plunger in the chain tensioner making it 

easier to operate the link plate.

2. Push back the plunger slowly in the direction 

shown in the figure with the link plate still pushed 

down.

3. Remove the screwdriver from the link plate with 

the plunger still pushed down.

4. Release the force slightly from the plunger, and 

move it back and forth 

2—3 mm {0.08—0.11 in}.

CLOTH

FRONT OIL SEAL

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LINK PLATE

PLUNGER

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