Piston Ring-To-Groove Clearance Inspection; Piston Ring-To-Groove Clearance; Connecting Rod Big End Bearing Inspection - Mitsubishi K3G Manual

2 . Piston Ring-to-Groove Clearance Inspection

(I ) Measure the piston ring-to-groove clearan­
ce. If the clearance exceeds the service limit,
replace the ring with a new one and re-.check
the clearance.
(2) If the clearance still exceeds the service limit,
replace the piston with a new one.

Piston ring-to-groove clearance

Description Standard value
No.I 0,06
No.2 0,07
0,05
Oil ring

3. Connecting Rod Big End Bearing Inspection

Install the big end bearings and cap to the connect­
ing rod, tighten the rod cap to the specified torque
and measure the bearing I. D.
Caution
• Oil clearance between the big end bearing and the
crankpin can be measured with a plastic gauge.
• If the oil clearance does not fall within the service
limit with new bearings, refer to the crankshaft
chapter and use undersize bearings.
•
Service limit
0,3 Measuring Piston Ring-to-Groove Clearance
0,2
0,2
Measuring Semi-keystone Piston Ring-to-Groove Clearance
Measuring Rod Big End Bearing I. D.
Description
Rod big end
bearing I.
(Standard)
Rod big end
bearing oil
clearance
Cap nut
tightening
torque (kgm)
-57-
Taperring clearance
Plan ring clearance
Standard value Service limit
42
D.
0.025"-'0,080
3.2 - 3.5
+o . 15
+0 . 15
o. 15
o.
15