Mazda engine L8, LF, L3. Manual — part 9
B–16
ENGINE
2. Measure the out-of-square of the valve spring,
using a square, as shown.
(1) Rotate the valve spring one full turn and
measure "A" at the point where the gap is the
largest.
•
If not as specified, replace the valve
spring.
Valve spring maximum out-of-square:
1% (2.10 mm {0.0826 in})
End Of Sie
CAMSHAFT INSPECTION
A6E242412420E01
1. Set the No.1 and No.5 journals on V-blocks.
2. Measure the camshaft runout.
•
If not as specified, replace the camshaft.
Maximum runout:
0.03 mm {0.0012 in}
3. Measure the cam lobe height at the two points as
shown.
•
If not as specified, replace the camshaft.
Standard height (mm) {in}
Minimum height (mm) {in}
AME2224E309
AME2224E082
AME2224E343
Camshaft
L8
LF, L3
L3 (with
variable
valve timing
mechanism)
INT
40.79 {1.606}
42.12 {1.659}
42.44 {1.671}
EXH
41.08 {1.618}
41.08 {1.618}
41.18 {1.622}
Camshaft
L8
LF, L3
L3 (with
variable
valve timing
mechanism)
INT
40.692
{1.603}
42.022
{1.655}
42.342
{1.667}
EXH
40.982
{1.614}
40.982
{1.614}
41.082
{1.618}
ENGINE
B–17
B
4. Measure the journal diameters in X and Y
directions at the two points (A and B) as indicated
in the figure.
•
If not as specified, replace the camshaft.
Standard diameter:
24.96—24.98 mm {0.9827—0.9834 in}
Minimum diameter:
24.95 mm {0.982 in}
5. Remove the tappet.
6. Position plasticgage atop the journals in the axial
direction.
7. IInstall the camshaft cap. (See
8. Remove the camshaft cap. (See
B–6 Camshaft Cap Disassembly Note
9. Measure the oil clearance.
•
If not as specified, replace the cylinder head.
Standard clearance:
0.04—0.08 mm {0.002—0.003 in}
Maximum clearance:
0.09 mm {0.0035 in}
10. Install the camshaft cap. (See
11. Measure the camshaft end play.
•
If not as specified, replace the cylinder head
or camshaft.
Standard end play:
0.09—0.24 mm {0.0035—0.0094 in}
Maximum end play:
0.25 mm {0.0099 in}
12. Remove the camshaft cap. (See
.)
End Of Sie
AME2224E344
AME2224E307
AME2224E025
B–18
ENGINE
TAPPET INSPECTION
A6E242412310E01
1. Measure the tappet hole inner diameter in X and
Y directions at the two points (A and B) shown.
Inner diameter:
31.000—31.030 mm {1.2205—1.2216 in}
2. Measure the tappet body outer diameter in X and
Y directions at the two points (A and B) shown.
Outer diameter:
30.970—30.980 mm {1.2193—1.2196 in}
3. Subtract the tappet body outer diameter from the
tappet hole inner diameter.
•
If not as specified, replace the tappet or
cylinder head.
Clearance
Standard:
0.02—0.06 mm {0.0008—0.0023 in}
Maximum:
0.15 mm {0.006 in}
End Of Sie
CYLINDER BLOCK INSPECTION
A6E242410300E01
1. Measure the distortion of the cylinder block top
surface in the six directions as indicated in the
figure.
•
If the distortion exceeds the maximum,
replace the cylinder block.
Maximum cylinder block distortion:
0.10 mm {0.004 in}
2. Measure the cylinder bores in X and Y directions
at 42 mm {1.65 in} below the top surface.
•
If the cylinder bore exceeds the wear limit,
replace the cylinder block.
Standard diameter limit
L8:
83.000—83.030 mm {3.2677—3.2689 in}
LF, L3, L3 (with variable valve timing
mechanism):
87.500—87.530 mm {3.4449—3.4460 in}
Minimum / maximum bore diameter limit
L8:
82.940—83.090 mm {3.2653—3.2712 in}
LF, L3, L3 (with variable valve timing mechanism):
87.440—87.590 mm {3.4425—3.4484 in}
AME2224E319
AME2224E320
AME2224E089
AME2224E090
ENGINE
B–19
B
End Of Sie
OIL JET VALVE INSPECTION
A6E242410730E02
1. Apply compressed air to oil jet valve A and verify
that air passes through oil jet valve B.
•
If not ventilation,replace the oil jet valve.
Air pressure:
216—274 kPa {2.2—2.7kgf•cm
2
31.4—39.7
psi}
End Of Sie
PISTON INSPECTION
A6E242411010E01
Caution
••••
The piston, piston ring and connecting rod cannot be disassembled.
••••
When replacing the piston, piston pin, piston ring and connecting rod, replace them together as a
single unit.
1. Measure the outer diameter of each piston at right
angle 90
°
to the piston pin, 10.0 mm {0.40 in}
above the under of the piston.
•
If the piston diameter is below the standard
diameter, replace the piston, piston pin, piston
ring and connecting rod as a single unit.
Piston diameter
L8:
82.965—82.995 mm {3.2664—3.2675 in}
LF, L3, L3 (with variable valve timing
mechanism):
87.465—87.495 mm {3.4435—3.4446 in}
2. Measure the piston-to-cylinder clearance.
•
If not as specified, replace the piston, piston pin, piston ring and connecting rod as a single unit.
Standard clearance:
0.025—0.045 mm {0.0010—0.0017 in}
Maximum clearance:
0.11 mm {0.0043 in}
3. Measure the piston ring-to-ring groove clearance
around the entire circumference.
•
If the piston ring-to-ring groove clearance
exceeds the maximum clearance, replace the
piston, piston pin, piston ring and connecting
rod as a single unit.
Standard clearance:
Top: 0.03—0.08 mm {0.0012—0.0031 in}
Second: 0.03—0.07 mm {0.0012—0.0027in}
Oil: 0.03—0.07 mm {0.0012—0.0027 in}
Maximum clearance:
Top: 0.17 mm {0.0067 in}
Second, Oil: 0.15 mm {0.0059 in}
AME2224E105
AME2224E030
AME2224E029
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