Mitsubishi Heavy Industries SL Series Service Manual page 61

INSPECTION AND REPAIR OF BASIC ENGINE
1. Inspecting and repairing cylinder head
and valve mechanism .....................6-2
1.1 Measuring distortion of the bottom surface
of the cylinder head.................................. 6-2
1.2 Measuring clearance between rocker arm
and rocker shaft ....................................... 6-2
1.3 Measuring perpendicularity and
free length of valve spring........................ 6-2
1.4 Measuring push rod runout ...................... 6-3
1.5 Measuring valve stem outside diameter and
valve guide inside diameter ..................... 6-3
1.6 Replacing valve guide.............................. 6-3
1.7 Inspecting valve face ............................... 6-4
1.8 Refacing valve face.................................. 6-4
1.9 Refacing valve seat.................................. 6-5
1.10 Lapping valve and valve seat................... 6-5
1.11 Removing combustion jet......................... 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 bushing.................................. 6-9
3.5 Replacing camshaft bushing.................... 6-9
3.5.1 Removing camshaft bushing ......................6-9
3.5.2 Driving in camshaft bushing .......................6-9
3.6 Measuring cam lift.................................. 6-10
3.7 Measuring cam height of fuel injection
pump camshaft ...................................... 6-10
3.8 Inspecting tappet.................................... 6-10
3.9 Measuring clearance between tappet and
tappet guide hole ................................... 6-10
4. Inspecting and repairing cylinder block,
crankshaft and piston ....................6-11
4.1 Measuring cylinder inside diameter ....... 6-11
4.2 Measuring piston outside diameter ........ 6-11
4.3 Measuring piston ring groove................. 6-12
4.4 Measuring piston ring end gap............... 6-12
4.5 Measuring piston pin bore diameter and
piston pin outside diameter .................... 6-13
4.6 Inspecting connecting rod bend and twist6-13
4.7 Measuring connecting rod end play ....... 6-14
4.8 Measuring clearance between
connecting rod bearing and crankpin ..... 6-15
4.9 Measuring clearance between main bearing
and crankshaft journal............................ 6-16
4.10 Measuring crankshaft runout.................. 6-17
4.11 Replacing crankshaft gear ..................... 6-17
4.11.1 Removing crankshaft gear....................... 6-17
4.11.2 Installing crankshaft gear......................... 6-17
4.12 Measuring distortion cylinder block
top surface ............................................. 6-18
6-1