Mitsubishi diesel engines - Engine Main Parts - Inspection and Correction

1. Cylinder Head, Valve Mechanism······················································· 2 -18
1.1 Measuring the cylinder head bottom face distortion··································· 2 -18
1.2 Measuring the rocker arm bore and the rocker shaft diameter····················· 2 -18
1.3 Measuring the valve spring for squareness and free length ························ 2 -18
1.4 Measuring the push rod for bend ··························································· 2 -19
1.5 Measuring the valve stem diameter························································ 2 -19
1.6 Measuring the clearance between the valve stem and guide······················· 2 -19
1.7 Replacing the valve guide····································································· 2 -20
1.8 Inspecting the valve face······································································ 2 -20
1.9 Correcting the valve face······································································ 2 -21
1.10 Correcting the valve seat······································································ 2 -21
1.11 Lapping the valve face against the valve seat ·········································· 2 -22
1.12 Replacing the combustion jets······························································· 2 -22
2. Flywheel, Timing Gear, Camshaft······················································· 2 -23
2.1 Measuring the flywheel flatness····························································· 2 -23
2.2 Replacing the ring gear········································································ 2 -23
2.3 Measuring the timing gear backlash ······················································· 2 -23
2.4 Measuring the clearance between the idler gear and the idler shaft·············· 2 -24
2.5 Replacing the idler shaft······································································· 2 -24
2.6 Measuring the clearance between the camshaft journal and the bushing ······ 2 -24
2.7 Extracting the camshaft bushing···························································· 2 -25
2.8 Press-fitting the camshaft bushing ························································· 2 -25
2.9 Measuring the camshaft cam height ······················································· 2 -25
2.10 Measuring the fuel injection pump shaft cam height ·································· 2 -25
2.11 Inspecting the cam-to-tappet contact ······················································ 2 -26
2.12 Measuring the clearance between the tappet and the tappet guide ·············· 2 -26
3. Cylinder Block, Crankshaft, Pistons, Oil Pan······································ 2 -27
3.1 Measuring the piston diameter ······························································ 2 -27
3.2 Measuring the clearance between the piston ring and the ring groove ·········· 2 -27
3.3 Measuring the piston ring gap ······························································· 2 -27
3.4 Measuring the clearance between the piston pin and the pin boss ··············· 2 -28
3.5 Measuring the connecting rod bend and twist··········································· 2 -28
3.6 Measuring the connecting rod end play··················································· 2 -29
3.7 Inspecting the oil clearance for connecting rod bearings ···························· 2 -29
3.8 Inspecting the main bearings oil clearance ·············································· 2 -30
3.9 Measuring the crankshaft for bend ························································· 2 -31
3.10 Removing the crankshaft gear······························································· 2 -31
3.11 Installing the crankshaft gear································································· 2 -31
3.12 Measuring the cylinder bore·································································· 2 -32
3.13 Measuring the cylinder block top face for distortion ··································· 2 -32
ENGINE MAIN PARTS - INSPECTION AND CORRECTION