Mazda X-5. Manual - part 14

 

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Mazda X-5. Manual - part 14

 

 

MECHANICAL 

01–10–7

01–10

CONNECTING ROD, CONNECTING ROD BEARING CONSTRUCTION [LF]

E5U011011211N01

• Connecting rod is made of structural sintered alloy to improve rigidity.

• The connecting rod, the piston, and the piston pin are 

interference fit, so that they cannot be disassembled.

• The connecting rod bolts are 

torque-to-yield type to be tightened in two steps to insure tightening stability

and cannot be reused.

• There is no positioning tab for the connecting rod bearing. When installing the bearing, measure the position of 

the bearing so that the position gets to the center of the connecting rod and the bearing cap, and install it.

• The big end of the connecting rod and the connecting rod cap were originally formed as a single unit and then 

it was cut into the connecting rod and the cap. The form of the cutting surface is used for the alignment mark for 
the connecting rod and the cap.

• The upper and lower bearing of the connecting rod bearing is made of aluminum alloy.

• There are three kinds of connecting rod bearings depending on the oil clearance.

End Of Sie

2.32.7 mm
{0.090.10 in}

ENLARGEMENT

FRACTURE SIDE

CONNECTING ROD

CONNECTING ROD 
BEARING

CONNECTING ROD 
BEARING CAP

CONNECTING ROD 
BEARING CAP

E5U110ZT5014

Bearing size

Bearing thickness (mm {in})

Standard

1.498—1.522 {0.0589—0.0599}

0.25OS

1.623—1.629 {0.0639—0.0641}

0.50OS

1.748—1.754 {0.0688—0.0690}

MECHANICAL 

01–10–8

DRIVE BELT CONSTRUCTION [LF]

E5U011015800N01

• A V-ribbed drive belt is employed.

•  

A single, serpentine type drive belt drives auxiliary parts, resulting in a shortened overall belt length and 

improved serviceability. 

• A front drive belt auto tensioner with an embedded coil spring has been adopted to automatically maintain the 

optimal drive belt tension. 

Drive Belt Specification.

*

:  A/C non-equipping vehicle specification.

End Of Sie

item

Specification

Belt length

mm {in}

About 2,243 {88.31}

 (About 2,163 {85.16})*

Belt width

mm {in}

About 20.5 {0.81}

P/S OIL PUMP PULLEY

WITH A/C

WITHOUT A/C

A/C COMPRESSOR 
PULLEY

WATER 
PUMP 
PULLEY

CRANKSHAFT PULLEY

FRONT DRIVE BELT 
AUTO TENSIONER

GENERATOR 
PULLEY

IDLER PULLEY

DRIVE BELT

P/S OIL PUMP PULLEY

IDLER PULLEY

WATER 
PUMP 
PULLEY

CRANKSHAFT PULLEY

FRONT DRIVE BELT 
AUTO TENSIONER

GENERATOR 
PULLEY

IDLER PULLEY

DRIVE BELT

E5U110ZT5015

MECHANICAL 

01–10–9

01–10

VALVE MECHANISM OUTLINE [LF]

E5U011012111N01

• There are two intake ports and two exhaust ports each cylinder. Totally 16 valves are directly driven by two 

camshafts. 

• The variable valve timing mechanism, which insures the best valve timing depending on the drive condition by 

constantly changing the phase of the intake port side camshaft, has been adopted.

End Of Sie

VALVE MECHANISM STRUCTUAL VIEW [LF]

E5U011012111N02

Structural view

End Of Sie

CAMSHAFT

VARIABLE VALVE TIMING ACTUATOR 

OIL CONTROL VALVE (OCV)

TAPPET

VALVE ASSEMBLY

CHAIN GUIDE

CRANKSHAFT SPROCKET

 CHAIN TENSIONER

TENSIONER ARM

CAMSHAFT SPROCKET

TIMING CHAIN

E5U110ZT5003

MECHANICAL 

01–10–10

VALVE, VALVE SPRING, VALVE SEAL, VALVE GUIDE CONSTRUCTION [LF]

E5U011012111N03

• The valves are heat-resistant steel. There are two intake valves, two exhaust valves per cylinder.

Valve specification

• The intake valve and the exhaust valve are 

treated with the tufftride process to improve 
abrasion resistance.

• The valve spring is an uneven outer dimension 

type. It has been improved by reducing the size of 
the upper seat.

• The valve guide is made of the sintered alloy to 

improve abrasion resistance.

• The valve seat is integrated with the lower valve 

spring seat to simplify the unit and improve its 
serviceability.

End Of Sie

CAMSHAFT CONSTRUCTION [LF]

E5U011012420N01

• The cast iron 5 axis-hole, which has great rigidity, has been adopted for the camshaft to insure higher reliability.

• The endplay of the camshaft is regulated at the rear of the No. 1 journal.

• The lubricating oil is supplied through the oil supply hole at each journal. Additionally the cam nose part is chill 

cast to improve the abrasion resistance and the width of cam hill part is shortened to reduce the weight.

• There is no camshaft sprocket positioning pin or key slot at the camshaft end. The camshaft sprocket is 

secured using tightening pressure of the installation bolts.

• There is an oil line, by which the oil is supplied to the variable valve timing actuator, located at intake camshaft 

(front of camshaft).

Camshaft Specification.

item Specification

valve full length

(mm {in})

Intake valve: About 103.4 {4.070}

Exhaust valve: About 104.7 {4.122}

Intake valve umbrella diameter

(mm {in})

About 35 {1.38}

Exhaust valve umbrella diameter 

(mm {in})

About 30 {1.18}

Stem diameter

(mm {in})

Intake valve: About 5.5 {0.22}

Exhaust valve: About 5.5 {0.22}

VALVE SPRING

VALVE

VALVE GUIDE

VALVE SEAL

VALVE KEEPER

UPPER VALVE 
SPRING SEAT

E5U110ZT5016

item

Specification

IN

EX

LIFT

(mm {in})

9.1 {0.35}

7.8 {0.30}

Overlap

(

°)

5—35

 

 

 

 

 

 

 

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