Mitsubishi L3C Service Manual

6-1
INSPECTION AND REPAIR OF BASIC ENGINE
1. Inspecting and repairing cylinder head
and valve mechanism .....................6-2
1.1 Measuring clearance between rocker arm
and rocker shaft ....................................... 6-2
1.2 Measuring valve stem outside diameter and
valve guide inside diameter ..................... 6-2
1.3 Replacing valve guide.............................. 6-3
1.4 Inspecting valve face ............................... 6-4
1.5 Refacing valve face.................................. 6-4
1.6 Measuring perpendicularity and free length
of valve spring.......................................... 6-5
1.7 Lapping valve and valve seat................... 6-5
1.8 Measuring distortion of the bottom surface
of the cylinder head.................................. 6-6
1.9 Measuring push rod runout...................... 6-6
2. Inspecting and repairing flywheel....6-7
2.1 Measuring flatness of flywheel................. 6-7
2.2 Inspecting ring gear ................................. 6-7
2.3 Replacing ring gear.................................. 6-7
2.3.1 Removing ring gear....................................6-7
2.3.2 Installing ring gear......................................6-7
3. Inspecting and repairing gear case,
timing gear and camshaft................6-8
3.1 Measuring timing gear backlash .............. 6-8
3.2 Measuring clearance between idler gear
and idler shaft .......................................... 6-8
3.3 Replacing idler shaft ................................ 6-8
3.4 Measuring clearance between
camshaft journal and cylinder block bore. 6-9
3.5 Measuring cam lift.................................... 6-9
3.6 Measuring cam height of fuel injection
pump camshaft ........................................ 6-9
3.7 Inspecting tappet.................................... 6-10
3.8 Measuring clearance between tappet and
tappet guide hole ................................... 6-10
4. Inspecting and repairing cylinder block,
crankshaft, piston and oil pan .......6-11
4.1 Measuring cylinder inside diameter ....... 6-11
4.2 Reboring cylinder................................... 6-12
4.2.1 Measuring piston outside diameter ..........6-12
4.2.2 Boring finish dimension ............................6-12
4.3 Measuring piston ring end gap............... 6-13
4.4 Measuring clearance between piston ring
groove and piston ring ........................... 6-13
4.5 Measuring piston pin bore diameter and
piston pin outside diameter.................... 6-14
4.6 Measuring connecting rod end play ....... 6-14
4.7 Inspecting connecting rod bend and twist6-15
4.8 Measuring clearance between connecting
rod bearing and crankpin ...................... 6-16
4.9 Measuring clearance between
main bearing and crankshaft journal...... 6-17
4.10 Measuring crankshaft runout.................. 6-18
4.11 Replacing crankshaft gear ..................... 6-18
4.11.1 Removing crankshaft gear....................... 6-18
4.11.2 Installing crankshaft gear......................... 6-18
4.12 Measuring distortion cylinder block
top surface ............................................. 6-19

Mitsubishi L3C Specifications

General

Brand	Mitsubishi
Model	L3C
Category	Engine
Language	English