Power Unit
24) Inspection of Piston Outer Diameter
1.
Measure piston outer diameter between points specified.
Replace if the diameter is less than specified value.
Piston Outer Diameter a : Standard Value
60.96 mm ( 2.4000 in )
Measurement Points b :
9mm ( 0.35 in ) above piston skirt bottom
Functional Limit :
60.90 mm ( 2.3976 in )
25) Inspection of Cylinder Inner Diameter
Measure cylinder inner diameters (D1 to D6) at a, b and c
1.
in crankshaft directions d (D1, D3 and D5 respectively), and
in crank web directions e (D2, D4 and D6 respectively).
Cylinder Inner Diameters (D1 to D6) : Standard Value
61.00 mm ( 2.4016 in )
Functional Limit :
Replace if over 61.06 mm ( 2.4039 in ).
Note : Measure at the maximum wear points.
2.
Obtain taper through calculation described below. Replace
cylinder block if taper is over specified value.
Taper :
D1 – D5 ( Measurement Point a )
D2 – D6 ( Measurement Point c )
Functional Limit :
0.08 mm ( 0.0032 in )
3.
Obtain out-of-roundness through calculation described
below. Replace cylinder block if out-of-roundness is over
specified value.
Out-of-roundness :
D2 – D1 ( Direction d )
D6 – D5 ( Direction e )
Functional Limit :
0.06 mm ( 0.0024 in )
26) Inspection of Piston Clearance
1.
If piston clearance is over specified limit, replace cylinder
block, piston and piston rings as a set, or both.
Piston Clearance :
0.020 to 0.055 mm ( 0.00079 to 0.00217 in )
Functional Limit :
0.150 mm ( 0.00591 in )
5-46
a
!
#
a 15mm ( 0.6in )
b 35mm ( 1.4in )
c 55mm ( 2.2in )
b
a
b
"
c
$
d
e
25/30 2006