Tappets - Nanni N4.40 Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
(Continued)
IMPORTANT
• After you replace an item below, you have to select a
cylinder head gasket.
– Piston
– Piston pin
– Small end bushing
– Connecting rod
– Crankpin bearings
To select the cylinder head gasket
1. Measure the protrusion or recess of the piston head from the
level of crankcase cylinder face at 4 points per each piston with
a dial gauge.
2. Get the average of the measurements.
3. Use the table below to select an applicable cylinder head
gasket.
D1503-M, D1703-M,
D1803-M, V2003-M,
V2203-M, V2403-M,
Gasket Dimension
(Number)
0.500 to 0.540 mm
15
0.0197 to 0.0212 in.
0.550 to 0.590 mm
20
0.0217 to 0.0232 in.
0.600 to 0.640 mm
25
0.0237 to 0.0251 in.
0.650 to 0.690 mm
30
0.0256 to 0.0271 in.
0.700 to 0.740 mm
35
0.0276 to 0.0291 in.
(6) Points of Measurement

Tappets

1. Remove the tappets (1) from the crankcase.
(When reassembling)
• Before you install the tappets, apply a thin layer of engine oil
around them.
• Examine the contact between tappets and cams that it turns
correctly. If it is defective, replace the tappets.
IMPORTANT
• Do not change the combination of tappet and tappet guide.
(1) Tappet
1-S52
Piston Protrusion
V2403-M-T, D1803-M-DI,
D1703-M-BG, V2403-M-DI,
V2003-M-BG, V2403-M-DI-T
V2003-M-T-BG,
V2203-M-BG,
V2403-M-BG
0.475 to 0.525 mm
0.0187 to 0.0206 in.
0.525 to 0.575 mm
0.0206 to 0.0227 in.
0.575 to 0.625 mm
0.0227 to 0.0246 in.
0.625 to 0.675 mm
0.0246 to 0.0266 in.
0.675 to 0.725 mm
0.0266 to 0.0285 in.
[A] D1503-M, D1703-M, D1803-M,
V2003-M, V2203-M, V2403-M,
V2403-M-T, D1703-M-BG,
V2003-M-BG, V2003-M-T-BG,
V2203-M-BG, V2403-M-BG
[B] D1803-M-DI, V2403-M-DI,
V2403-M-DI-T
M00000003ENS0073US1
M00000003ENS0074US1
ENGINE
KiSC issued 06, 2009 A