Mazda RX-7 1989 Service-Handbuch

•

RX-7

CONTENTS

TITLE

ENGINE

LUBLICATION SYSTEM

COOLING SYSTEM

FUEL AND EMISSION

CONTROL SYSTEMS

(NON-

TURBO)

-----

---

--- ---

----

---

FUEL AND EMISSION

CONTROL SYSTEMS (TURBO)

ENGINE ELECTRICAL SYSTEM

MANUAL

TRANSMISSION

AUTOMATIC TRANSMISSION

(ELECTRONICALLY-CONTROLLED)

---

----

FRONT AND REAR AXLES

STEERING SYSTEM

BRAKING SYSTEM

-----

SUSPENSION

SECTION

BODY 14

BODY ELECTRICAL SYSTEM 15

-ENGINE

OUTLINE

..................................................

C-

OUTLINE OF CONSTRUCTION

.................

C-

STRUCTURAL VIEW

................................

C-

SPECIFICATIONS

....................................

C-

INTERCHANGEABILITY

............................

C-

TENSION BOLT

........................................

C-

FRONT COVER

.........................................

C-

ROTOR

....................................................

C-

97UOCX

501

OUTLINE

OUTLINE OF CONSTRUCTION

The 13B

the 1989

RX-7

basically the same as

the previous model but with some modli

c:=:-

improved engine performance.

Major changes

Rotor : Lighter, rotor recess shape change to increase compression ratio

Tension bolt : Strengthening ribs added

Front cover : Shape changed for new metering

oil

pump

Side housings : Inlet port erea enlarged

STRUCTURAL VIEW

HOUSING-RELATED PARTS

FRONT ROTOR HOUSING

FRONT HOUSING

FRONT OIL SEAL

REAR HOUSING

REAR ROTOR HOUSING

INTERMEDIATE

HOUSING

C-2

97UOCX·502

._)

·-

TING-RELATED

;:;'"'TA PARTS

BALANCE WEIGHT

ECCENTRIC PULLEY

REAR ROTOR

FRONT ROTOR

' •

DRIVE PLATE

COUNTER WEIGHT

FLYWHEEL

C-3

SPECIFICATIONS

Item Model Turbo Non-Turbo

Eng1ne type Rotary eng1ne

Displacement

(cu

1n)

6S4 X 2 (40.0 X

Number

of cyl1nders and

arrangement

2 rotors. longitudinal

Combustion

chamber

type

Bathtub

Compression

rat10

9.0 1 9.7 1

A1r

Induction 4 port

1nduct1on

6 port

1nduct1on

Pnmary 4S0 ATOC

32°

ATOC

Open

Secondary

32°

ATOC

Auxiliary 4S0 ATOC

Intake Pnmary

S0°

ABOC

40°

ABOC

Port

t1m1ng

Secondary

soo

ABOC

30°

ABOC

Auxil1ary

80"

ABOC \

Open

7S0 BBDC

Exhaust Close

48°

ATOC

Fuel

supply

system EGI

lgn1t1on

t1ming

(w1th

test

connector

Tra1l1ng

(Green

1-p1n)

grounded)

Lead1ng

20°

± 2 ' ATOC (REO)

l,~

± 1o ATOC (YELLOW)

Idle

speed

(w1th

test

connector

(Green 1-pln)

grounded)

rpm 750 ± 25

97UOCX 504

C-4

•

INTERCHANGEABILITY

:::

,.,,ng

chart shows interchangeability of major components of the previous model and the 1989 mode'

...

ousmg-

·~

ated

;:.a

r1S

X Not interchangeable

Part

Front rotor hous1ng

Rear rotor hous1ng

Front

hous1ng

intermed1ate housing

Rear housing

nner

seal1ng

rubber

Outer sealing rubber

Front cover

Orl

pan

Tens1on

bolt

. -

---1

;;

:~at1ng-

::ccentnc shaft

a~ed

=~~s

Rotor

~~pex

seal

3a',ance weight I

J I pump dnve sprocket

-~·

: :centr1c shaft pulley t

=centnc shaft bypass valve - -

Sde

seal

:::orner

seal

-1

. ·ey lock bolt

heel

(MIT)

•· beanng

(MIT)

.1ter

we1ght

(A/T)

Interchangeability

C-5

Remark

• Knock sensor boss added

• Inlet port area enlarged

• Shape changed to Incorporate new

metw

tng

Oil

pump

• Ribs added

center of shank

•

We1ght

reduct1on

• Combustion chamber shape changed

• Shape changed

•

We1ght

reduct1on

• Shape changed

' •

We1ght

reduct1on

TENSION BOLT

OTHERS

(}1

No.18 BOLT

NOTE

No.1? SOL

T IS LONGER THAN

OTHERS. THERE IS AN IDEN-

TIFICATION MARK.

lllllllllllllllllllllllllllllll

STRENGTHNING RIBS

128

2mm

(5.04 ± 0.08 in)

HEAT-SHRINK PROTECTOR

No.18 BOLT

97UOCI 506

The strength of the tension bolts

increased by addit1on of strengthening ribs

the middle of the shank.

The tension bolt installed into the No.18 hole differs from others

that

not fully enclosed. lead1ng to

transmiss1on of eng1ne noise. To reduce this noise. the heat-shrik protector

used on the bolt where

goes

through the intermediate housing boss. The No.18 bolt

supplied as an assembly (bolt

w1th

washer and

protector).

the bolt

reused and the protector

damaged, replace the protector. The protector

easily

shrunk

w1th

a l1ghter or match.

C-6

...

.•

•

FRONT COVER

FRONT COVER GASKET

FRONT COVER

~BACKUP

RING

0-RING

· 989

RX-7

front cover

changed to incorporate a new metering

oil

pump.

:::::ded

between the front cover and front housing for improved sealing.

C-7

97UOCX 507

ROTOR

TURBO

RIBS A

10.9mm (0.43 in)

NON-TURBO

c--~~

RIBS A A

r---/1

8.8mm (0.35 in)

97UOCX 508

The rotor

the 1989

RX-7

lighter and provides a higher compression ratio (9.0 : 1 for turbo model and

9.7 : 1 for non-turbo model) than the previous engine.

These improvements results

a engine with more power and torque.

The rotor ribs are redesigned for increased strength.

The combustion chamber rotor recess

made more uniform by utilizing a mechanical cutting process.

The rotor for turbo and non-turbo engines are distinguished by the rotor recess shape.

C-8

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