ENGINE
EA330-E4, WSM
1-S15
Top Clearance
1. Tighten the cylinder head to the specified torque (57 to 61 N·m,
5.8 to 6.3 kgf·m, 42 to 45 lbf·ft).
2. Remove the nozzle holder.
3. Set the piston to the bottom dead center and insert a
high-quality fuse through the nozzle holder hole. (Use care so
that the fuse does not contact the valve head.).
4. Turn the piston slowly with the flywheel until it passes the top
dead center.
5. Pull out the fuse slowly without letting it drop.
6. Measure the top clearance three times, each with a new fuse
positioned in different directions.
7. Measure the thickness of the crushed fuse with a vernier
caliper.
(Reference)
• The top clearance (A) can be determined also from the amount
of projection (C) above the liner.
[Top clearance (A) = (B) - (C)]
8. If the clearance is not within the factory specifications, check
and correct the oil clearance at the crank pin, oil filler ring and
piston pin.
9Y1211018ENS0008US0
Head gasket thickness
(B)
Tightened
0.950 to 1.05 mm
0.0374 to 0.0413 in.
Top clearance Factory specification
0.60 to 0.80 mm
0.024 to 0.031 in.
(1) Cylinder Head
(2) Head Gasket
(3) Cylinder Block
(4) Piston
(5) Cylinder Liner
(A) Top Clearance
(B) Head Gasket Thickness
(C) Amount of Projection
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