Mazda 121 - Adjustment of Engine Valve Clearance; Tightening Intake Manifold Bolts and Nuts; Tightening Exhaust Manifold Nuts; Replacement Timing Belt

SCHEDULED
MAINTENANCE
SERVICES
ADJUSTING SCFEW
LOCKNUT
ADJUSTIIENT
OF
ENGINE VALVE
CLEARANCE
Note
.
When
valve clearance
inspection
and cylindefiead
r
bolts
retightening service
are ai
the
same
interval,
E
tlEhten
the cylinder
head bolts
tlrst.
I
1. Warm up
the engine
to normal operating
temperature.
2. With the
piston
ofthe
No.1 cylinderat
TDC ofcompression,
adjust the
valve clearances
illustrated.
valve clearance
(at
valve)
lntake
: 0.30mm
(0.012
in)
Exhaust:
0.30mm
(0.012
in)
3.
Turn the crankshaft
one
full turn so that the
piston
of the
No.4 cylinder
is at TDC ol compression,
and adjusl
the clear-
ances
of the
remaining valves.
TIGHTENING
INTAKE
MANIFOLD
BOLTS AND NUTS
Tightening
torque:
19-25
N.m
(1,9-2.6
m-kg, 14-19
ttlb)
TIGHTENING
EXHAUST
MANIFOLD
NUTS
Tightening
lorque:
16-23
Nm
(1.6-2.3
m-kg, 12-17
ftlb)
REPLACEMENT
TIMING BELT
Refer to Section
I ot the
Workshop
Manual for the replace-
ment
procedure
of the timing
belt.
A-5