Mazda Engine SKYACTIV-G 2.5. Manual - part 3

GENERAL INFORMATION 

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ABBREVIATIONS

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FUNDAMENTAL PROCEDURES

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Preparation of Tools and Measuring Equipment

• Be sure that all necessary tools and measuring 

equipment are available before starting any work.

Special Service Tools

• Use special service tools or equivalent when they 

are required.

Disassembly

• If the disassembly procedure is complex, 

requiring many parts to be disassembled, all parts 

should be marked in a place that will not affect 

their performance or external appearance and 

identified so that reassembly can be performed 

easily and efficiently.

ATX

Automatic Transaxle

EX

Exhaust

HLA

Hydraulic Lash Adjuster

IN

Intake

MTX

Manual Transaxle

OCV

Oil Control Valve

TDC

Top Dead Center

SST

Special Service Tool

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49 SE01 310

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GENERAL INFORMATION 

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Inspection During Removal, Disassembly

• When removed, each part should be carefully 

inspected for malfunction, deformation, damage 

and other problems.

Arrangement of Parts

• All disassembled parts should be carefully 

arranged for reassembly.

• Be sure to separate or otherwise identify the parts 

to be replaced from those that will be reused.

Cleaning of Parts

• All parts to be reused should be carefully and 

thoroughly cleaned in the appropriate method.

Warning

• Using compressed air can cause dirt and 

other particles to fly out causing injury to 

the eyes. Wear protective eye wear 

whenever using compressed air.

Reassembly

• Standard values, such as torques and certain 

adjustments, must be strictly observed in the 

reassembly of all parts.

• If removed, the following parts should be replaced 

with new ones:

—

Oil seals

—

Gaskets

—

O-rings

—

Lockwashers

—

Cotter pins

—

Nylon nuts

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• Depending on location:

—

Sealant and gaskets, or both, should be 

applied to specified locations. When sealant 

is applied, parts should be installed before 

sealant hardens to prevent leakage.

—

Oil should be applied to the moving 

components of parts.

—

Specified oil or grease should be applied at 

the prescribed locations (such as oil seals) 

before reassembly.

Adjustment

• Use suitable gauges and testers when making 

adjustments.

Rubber Parts and Tubing

• Prevent gasoline or oil from getting on rubber 

parts or tubing.

Torque Formulas

• When using a torque wrench-SST or equivalent 

combination, the written torque must be 

recalculated due to the extra length that the 

SST 

or equivalent adds to the torque wrench. 

Recalculate the torque by using the following 

formulas. Choose the formula that applies to you.

A : The length of the 

SST  past the torque wrench drive.

L : The length of the torque wrench.

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Torque Unit

Formula

N·m

N·m × [L/(L+A)]

kgf·m

kgf·m × [L/(L+A)]

kgf·cm

kgf·cm × [L/(L+A)]

ft·lbf

ft·lbf × [L/(L+A)]

in·lbf

in·lbf × [L/(L+A)]

0

1

1

2

2

3

3

SST

A

L

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GENERAL INFORMATION 

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Vise

• When using a vise, put protective plates in the 

jaws of the vise to prevent damage to parts.

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PROTECTIVE PLATES

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