ENGINE SPECIFICATIONS
ENGINE BODY
Cylinder
Head
Item Model
12
Model
2-12
Cylinder head surface
.003 mm .003 mm
flatness
(0.0012
in.)
(0.0012
in.)
Top
clearance
0.60
to 0.80 mm 0.60 to 0.80 mm
(0.0236 to
0.315
in.)
(0.0236 to
0.0315
in.)
Free
1.15
to
1.30
mm
1.15
to
1.30
mm
Gasket thickness
(0.0453 to
0.0512
in.)
(0.0453 to
0.0512
in.
Tightened
1.05
to
1.15
mm
1.05
to
1.15
mm
(0.0413
to 0.0453 in.)
(0.0413
to 0.0453 in.)
Gasket shim thickness
- -
Compression pressure
3.09 MPa 3.09 MPa
(31.5
kgf/cm2, 448 psi)
(31.5
kgf/cm2, 448 psi)
Variance among
cylinders
-
-
Valves (IN., EX.)
Valve clearance (cold)
0.15
to
0.18
mm
0.15
to
0.18
mm
(0.006 to 0.007 in.) (0.006 to 0.007 in.)
Valve seat width
2.12 mm 2.12 mm
(0.0835 in.) (0.0835 in.)
Valve seat angle
0.785
rad. 0.785 rad.
(45.0
0
)
(45.0
0
)
Valve face angle
0.785
rad. 0.785 rad.
(45.0
0
)
(45.0
0
)
Valve recessing
0.75 to 0.95 mm 0.75 to 0.95 mm
(0.0295 to
0.0374
in.) (0.0295 to
0.0374
in.)
Clearance between valve 0.030 to 0.057 mm
0.030 to 0.057 mm
stem and guide
(0.00118
to 0.00224 in)
(0.00118
to 0.00224 in.)
Valve stem
0.0.
5.968 to 5.980 mm 5.968 to 5.980 mm
(0.23496 to 0.23543 in.) (0.23496 to 0.23543 in.)
Valve guide
1.0.
6.010
to 6.025 mm
6.010
to 6.025 mm
(0.23661 to
0.23721
in.) (0.23661 to
0.23721
in.)
Valve Timing
Open
0.35
rad. (20°)
0.35
rad. (20°)
Inlet valve
before TOC before TOC
Close
0.79
rad. (45°)
0.79
rad. (45°)
after
TOC after TOC
Open
0.87
rad. (50°)
0.87
rad. (50°)
Exhaust valve
before TOC before TOC
Close
0.26
rad.
(15°)
0.26 rad.
(15°)
after TOC after TOC
Valve Springs
Free length
31.6
mm
31.6
mm
(1.244 in.)
(1.244 in.)
Tilt
-
-
Tension
64.7 N/27 mm 64.7 N/27 mm
(6.6
kgf/27mm,
14.6
Ibs.l1.063 in.
(6.6
kgf/27 mm,
14.6
Ibs.l1.063 in.)
18
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