Mazda RX-7 - Check List of Clearances and Tolerances; Fuel Pump Checks and Adjustments

ENGINE
ITEM
DESCRIPTION
VALUE
(mm)
a
(!
q)
U'
c
(E
o
o
o
(r
AF
Minimum
clearance,
rotor to
rotor housing 0.40-0.70
AR Rotor
housing width
-
rotor width
0.13-0.17
AH
Height
of
rotor land
0.15-0.20
AG
Clearance
between apex
seal and
groove
0.065
+-
0.005
AS
Rotor
housing width
-
apex seal
length
0.10
+
0.0'l
AC
Clearance
between
corner seal
and
groove
0.02-0.048
AE
Clearance
between
corner seal
and side
seal 0.10
+
0.05
o
o)
'=
o
t
o
a
Apex seal
More
than
3.5
Corner
seal
Stroke
more than
0.5
Side
seal
Oilseal
o
'=
(6
o
co
Rotor bearing.
oilclearance
A
-
(Bearing
min. dia.)-
(Journal
max. dia.)
$
=
(Bearing
max. dia.)-
(Journal
min. dia.)
0.07-0.10
Main
bearing
oil clearance
A
=
(Bearing
min. dia.)-
(Journal
max. dia.)
B
=
(Bearing
max. dia.)-
(Journal
min. dia.)
0.05-0.08
End
play
0.04-0.07
o
o)
'6
o
I
Rotor
housing
Shrinkage
(between
dimension A and
B, C, or
D) 0.06
Side
housing
Surface
distortion
0.04
Side seal stepped
wear
0.10
o
o
o)
[U
Timing
At
idle
speed
T
=2Oi
(BTDC)
L=20"
(BTDC)
ldle
RPM
1000-1500 RPM
V-belt
tension
Def
lection equidistant
between
water
pump
and alternator
'10
-+
1
q
_E
oa
Tip clearance
0.07-0.10
Check
List Of
Clearances
And Tolerances
2.
Fuel
pump.
Both
the fuel
pump
and
relay
should
be
mounted in
rubber to
minimize
vibrations,
and
the
fuel
pump
must be installed uPright,
in
a
vertical
position,
to function
properly.
The fuel line
should
be
7-B
mm inside diameter, arranged
to be as short
as
possible
and
routed to avoid any
high tempera-
ture areas;
if
rubber
hose
is
used
for
lines,
use
only mineral-proof
rubber. Finally,
do
not
operate
the
pump
without fuel in the tank as
it may shorten the
pump
life.
Note:
The fuel flow
should
be 1.5
liters
per
30
seconds, measured
at the
carburetor connection.
3. Fuel
filter.
Use
care to
install it
for
the cor-
rect f low
direction.
4. ldle speed.
The idle speed should
be set
as
low
as
possible
to avoid back
fir-
ing.
5. Fuel requirement.
The
minimum
oclane
requirement
is
90.
To
provide
sufficient
lubri-
cation for
internal
parts,
the fuel
musl be mixed with
the correct
engine oil
in
a
ratio, oil-to-fuel, of
1:100-1:150, measured by
volume.
L-l
22