Mazda Engine SKYACTIV-G 2.5. Manual - part 19

MECHANICAL 

01-10–60

1. Assemble in the order indicated in the table.

.

R

R

WATER 
PUMP

R

8

9

7

6

5

4

2

1

OIL

OIL

OIL

OIL

OIL

OIL

N·m {kgf·m, ft·lbf}

OIL

OIL

13—17 N·m 
{133—173 kgf·cm, 
116—150 in·lbf}
+43—47
{4.4—4.7, 32—34}
+85—95

°

+85—95

°

3.0—6.0 N·m 
{31—61 kgf·cm, 
27—53 in·lbf}
+8—11 N·m 
{82—112 kgf·cm, 
71—97 in·lbf}

8—11 N·m 
{82—112 kgf·cm, 
71—97 in·lbf}

12—16 N·m 
{123—163 kgf·cm, 
107—141 in·lbf}

102—114 {10.5—11.6, 76—84}

75—85 {7.7—8.6, 56—62}

WITH OIL COOLER

WITHOUT OIL COOLER

3

3

20—26 
{2.1—2.6, 
15—19}

10

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1

Cylinder head gasket

2

Cylinder head

(See 01-10-61 Cylinder Head Assembly Note.)

3

Water inlet pipe

(See 01-10-62 Water Inlet Pipe Assembly Note.)

4

HLA

(See 01-10-63 HLA Assembly Note.)

5

Rocker arm

(See 01-10-63 Rocker Arm Assembly Note.)

6

OCV oil filter

7

Camshaft

(See 01-10-64 Camshaft Assembly Note.)

8

Camshaft cap

(See 01-10-64 Camshaft Assembly Note.)

9

OCV

10

Electric variable valve timing actuator, hydraulic 

variable valve timing actuator

(See 01-10-66 Electric Variable Valve Timing 

Actuator, Hydraulic Variable Valve Timing Actuator 

Assembly Note.)

MECHANICAL 

01-10–61

01-10

Cylinder Head Assembly Note

Caution

• If the following condition is met, replace the cylinder head bolts.

—

Length exceeds maximum 

specification

Standard cylinder head bolt length L

 145.2—145.8 mm {5.717—5.740 in}

Maximum cylinder head bolt length L

 146.5 mm {5.767 in}

1. When a cylinder head bolt is reused, apply engine 

oil to any part of the following:

• Bolt seating surface

• Cylinder head seating surface

2. Tighten the cylinder head bolts in the order shown 

in the following four steps.

Tightening procedure

Step 1: 13—17 N·m {133—173 kgf·cm, 116—

150 in·lbf}

Step 2: 43—47 N·m {4.4—4.7 kgf·m, 32—34 

ft·lbf}

Step 3: 85—95°

Step 4: 85—95°

L

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3

2

6

4

1

5

9

7

10

8

ENGINE 
FRONT

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MECHANICAL 

01-10–62

Water Inlet Pipe Assembly Note

Caution

• Do not apply oil (such as engine oil, ATF) to the O-ring of the water inlet pipe. Otherwise, the O-

ring could swell causing a seal malfunction.

1. Clean away the sealant adhering to the bolt hole on the cylinder block side of the water inlet pipe stay.

2. Apply engine coolant to the O-ring.

3. Install the O-ring to the water inlet pipe.

4. Insert the water inlet pipe into the water pump being careful not to damage the O-ring.

5. Install the water inlet pipe gasket with the gasket 

projection facing the direction shown in the figure.

6. Tighten the bolts in the order shown in the figure.

R

PROJECTION

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12—16 N·m 
{123—163 kgf·cm, 
107—141 in·lbf} 

STAY

WATER INLET PIPE

WATER OUTLET

1

N·m {kgf·m, ft·lbf}

20—26 
{2.1—2.6, 
15—19}

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MECHANICAL 

01-10–63

01-10

HLA Assembly Note

1. Perform HLA air bleeding using the following procedure:

(1) Put the HLA in a container filled with engine oil.

Caution

• Do not insert the round bar firmly because the check ball spring force is extremely weak.

(2) While lightly pressing the check ball using a 

round bar (

approx. 1.0 mm {0.039 in} 

diameter), bleed air by moving the plunger up 

and down.

(3) Press the end of the plunger in the oil and 

verify that there is no rebounding feel.

• If rebounding feel cannot be eliminated, 

replace the HLA.

2. Install the HLAs to their original positions as 

before removal.

Rocker Arm Assembly Note

1. Apply engine oil to the HLAs and the end of the 

valve stems.

2. Install the rocker arms to their original positions 

as before removal.

PLUNGER

CHECK 
BALL

1

2

CONTAINER 
FILLED WITH 
ENGINE OIL

ROUND BAR 
(APPROX. 1.0 
mm {0.039 in}  
DIAMETER)

ROUND 
BAR 

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OIL

OIL

HLA

VALVE

VALVE STEM

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