ENGINE
L3301, L3901, L4701, WSM
1-S11
4. CHECKING AND ADJUSTING
[1] ENGINE BODY
Compression Pressure
1. After warming-up the engine, remove the air cleaner, muffler,
glow lead, and glow plugs.
2. Set a compression tester (1) (Code No.: 07909-39081) with the
adaptor (2) to the glow plug hole.
3. Crank the engine with the starter to operate the engine approx.
200 to 300 min
-1
(rpm).
4. Measure a maximum value of the compression pressure. Do the
same steps for each cylinder.
• Check the compression pressure with the specified valve
clearance.
• Always use a fully charged battery for this test.
• Variances in each cylinder compression value must be less
than 10 %.
9Y1211012ENS0004US0
Compression pressure
Factory specification
2.95 to 3.23 MPa
30.0 to 33.0 kgf/cm
2
427 to 469 psi
Allowable limit
2.35 MPa
24.0 kgf/cm
2
341 psi
Tightening torque
Injector clamp screw
24 to 27 N·m
2.4 to 2.8 kgf·m
18 to 20 lbf·ft
Cylinder head cover screw
6.86 to 11.3 N·m
0.700 to 1.15 kgf·m
5.06 to 8.33 lbf·ft
Injection pipe retaining nut
24.5 to 29.4 N·m
2.50 to 2.99 kgf·m
18.1 to 21.6 lbf·ft
(1) Compression Tester (2) Glow Plug Adaptor
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