Selecting The Main Bearing - SELVA MARINE Blue Whale 250 EFI Service Manual

6. Install the crankcase onto the cylinder
block and apply engine oil to the threads
of the crankcase bolts.
7. Tighten the crankcase bolts to the speci-
fied torques in 2 stages and in the
sequence shown.
90˚
b
UP
S
5C
O
19
K
STBD
G 4 B
8 F
J
R
N
NOTE:
• Crankcase bolts 1–F can be reused 5
times.
• Do not turn the crankshaft until the crank-
shaft journal oil clearance measurement
has been completed.
• Tighten crankcase bolts 1–F to the speci-
fied torques in 2 stages first, and then
tighten crankcase bolts G–S to the speci-
fied torques in 2 stages.
• Make a mark b on the crankcase and
crankcase bolts, and then tighten crank-
case bolts 1–F 90° from the mark.
1–8 Crankcase bolt (M8):
1st: 25 N·m (2.5 kgf·m, 18.4 ft·lb)
2nd: 90°
9–F Crankcase bolt (M10):
1st: 40 N·m (4.0 kgf·m, 29.5 ft·lb)
2nd: 90°
G–S Crankcase bolt (M8):
1st: 14 N·m (1.4 kgf·m, 10.3 ft·lb)
2nd: 28 N·m (2.8 kgf·m, 20.7 ft·lb)
6P23H11
E
P
D6
L
0 2
H
PORT
A 3
I
E7
Q
M
S6P25990J
8. Gently remove the crankcase, and then
measure the width of the compressed
Plastigauge (PG-1) on each crankshaft
journal. Replace the main bearing if out
of specification.
Crankshaft journal oil clearance:
0.025–0.050 mm
(0.0010–0.0020 in)

Selecting the main bearing

1. When replacing the main bearing, select
the suitable bearing as follows.
Cylinder block
1
2
3
4
5
6
7
8
9
5-64