Reassembly - Mitsubishi S4Q User Manual

PISTONS, CONNECTING RODS,
CRANKSHAFT AND CRANKCASE
Figure 135 Checking clearance between tappet and
bore
Apply engine oil
Figure 136 Installing tappet
No. 5 bearing
(with flange)
Figure 137 Installing main bearings
76 / 174
2.
Inside
diameter of
bore for
tappet
Clearance
between
tappet and
bore
NOTE
If the bores are worn beyond the service limit, replace
the crankcase.

10.3 Reassembly

1.
2.
Apply engine oil
Tab and
notch
NOTE
ENGLISH
ENGINE MAIN PARTS
Checking clearance between tappet and bore
Measure the diameter of the tappet and the inside
diameter of the bore in the crankcase for the
tappet, as shown in the illustration, to check the
clearance. If the clearance exceeds the service
limit, replace the tappets.
Nominal
Item
Value
14.000 to 14.018
14
[0.55]
__
Installing tappet
1) Apply engine oil to the tappets and install them
in the bores in the crankcase.
2) Make sure the tappets rotate smoothly.
Installing main bearings
1) Install the lower halves of the main bearings in
the main bearing caps. Install the upper
halves of the main bearings in the crankcase.
a Make sure the upper and lower halves of the
main bearings are installed so the bearing
tabs fit into the notch in the crankcase and
main bearing caps.
b Only the upper halves of the main bearings
to be installed in the crankcases has an oil
groove.
Service Manual Mitsubishi SQ-Series diesel engines
Unit: mm [in.]
Assembly Repair
Standard Limit
14.100
[0.5512 to
[0.5551]
0.5519]
0.016 to 0.052
0.080
[0.0006 to
[0.0032]
0.0021]
Version 08/2004