N04C-UH ENGINE MECHANICAL SERVICE DATA

Idle speed 600 to 700 rpm
Maximum speed 3600 to 3700 rpm
Compression Pressure Standard

3200 kpa (32.6 kgf/cm2464 psi)
Minimum

2700 kpa (27.5 kgf/cm2392 psi)
Difference between each cylinder

290 kpa (3.0 kgf/cm242 psi)
Fan and generator V belt Deflection New belt 10.5 to 12.5 mm (0.413 to 0.492 in.)
Used belt 12.5 to 16.0 mm (0.492 to 0.630 in.)
No. 1 V (cooler compressor to crankshaft pulley) belt Deflection New belt 8.5 to 10.0 mm (0.335 to 0.394 in.)
Used belt 10.0 to 12.0 mm (0.394 to 0.472 in.)
Intake valve Clearance Cold 0.30 mm (0.0118 in.)
Exhaust valve Clearance Cold 0.45 mm (0.0177 in.)
Camshaft Circle runout Maximum 0.06 mm (0.00236 in.)
Cam lobe height Standard Intake 50.66 to 50.86 mm (1.9944 to 2.0023 in.)
Exhaust 49.36 to 49.56 mm (1.9432 to 1.9511 in.)
Minimum Intake 50.20 mm (1.9764 in.)
Exhaust 48.95 mm (1.9272 in.)
Cylinder head sub-assembly Warpage Maximum Cylinder block side 0.10 mm (0.00394 in.)
Intake manifold side
Exhaust manifold side
Compression spring Deviation Maximum 2.0 mm (0.0787 in.)
Length Standard 85.1 mm (3.350 in.)
Minimum 82.1 mm (3.232 in.)
Intake valve Width Standard 1.24 mm (0.0488 in.) or more
Overall length Standard 129.8 mm (5.1102 in.)
Stem diameter Standard 6.957 to 6.972 mm (0.2739 to 0.2745 in.)
Exhaust valve Width Standard 1.24 mm (0.0488 in.) or more
Overall length Standard 128.8 mm (5.0709 in.)
Stem diameter Standard 6.932 to 6.947 mm (0.2729 to 0.2735 in.)
Valve sink Standard Intake 0.8 to 1.0 mm (0.0315 to 0.0394 in.)
Exhaust 1.8 to 2.0 mm (0.0709 to 0.0787 in.)
Maximum Intake 1.1 mm (0.0433 in.)
Exhaust 2.1 mm (0.0827 in.)
Valve guide bush (cylinder head side) Inside diameter Standard 13.000 to 13.018 mm (0.5118 to 0.5125 in.)
Valve guide bush Inside diameter Standard 7.000 to 7.015 mm (0.2756 to 0.2762 in.)
Protrusion height Standard 26.4 to 26.8 mm (1.039 to 1.055 in.)
Oil clearance Standard Intake 0.028 to 0.058 mm (0.00110 to 0.00228 in.)
Exhaust 0.053 to 0.083 mm (0.00209 to 0.00327 in.)
Maximum Intake 0.12 mm (0.00472 in.)
Exhaust 0.15 mm (0.00591 in.)
Injection nozzle seat Protrusion height Standard 2.45 to 2.95 mm (0.0964 to 0.1161 in.)
Valve seat Cylinder head dimension Standard A 36.00 to 36.015 mm (1.4173 to 1.4179 in.)
B 8.4 to 8.6 mm (0.3307 to 0.3386 in.)
Pressure Standard Intake 0.7 to 1.1 mm (0.0276 to 0.0433 in.)
Exhaust 1.7 to 2.1 mm (0.0669 to 0.0827 in.)
No. 2 idle gear and shaft Thrust clearance Standard 0.103 to 0.164 mm (0.00406 to 0.00646 in.)
Maximum 0.30 mm (0.0118 in.)
Backlash Standard 0.036 to 0.227 mm (0.00142 to 0.00894 in.)
Maximum 0.30 mm (0.0118 in.)
Idle gear inside diameter Standard 50.000 to 50.025 mm (1.9685 to 1.9695 in.)
Maximum 50.05 mm (1.9704 in.)
Idle gear shaft diameter Standard 49.950 to 49.975 mm (1.9665 to 1.9675 in.)
Minimum 49.95 mm (1.9665 in.)
Oil clearance Standard 0.0125 to 0.0375 mm (0.000492 to 0.00148 in.)
Maximum 0.10 mm (0.00394 in.)
Camshaft timing gear Backlash Standard 0.069 to 0.203 mm (0.00272 to 0.00799 in.)
Maximum 0.30 mm (0.0118 in.)
Oil pump gear Backlash Standard 0.065 to 0.215 mm (0.00256 to 0.00846 in.)
Maximum 0.30 mm (0.0118 in.)
No. 1 idle gear and shaft Thrust clearance Standard 0.103 to 0.164 mm (0.00406 to 0.00646 in.)
Maximum 0.30 mm (0.0118 in.)
Backlash Standard 0.035 to 0.193 mm (0.00138 to 0.00760 in.)
Maximum 0.30 mm (0.0118 in.)
Idle gear inside diameter Standard 50.000 to 50.025 mm (1.9685 to 1.9695 in.)
Maximum 50.05 mm (19704 in.)
Idle gear shaft diameter Standard 49.950 to 49.975 mm (1.9665 to 1.9675 in.)
Minimum 49.95 mm (1.9665 in.)
Oil clearance Standard 0.0125 to 0.0370 mm (0.000492 to 0.00146 in.)
Maximum 0.10 mm (0.00394 in.)
Connecting rod Thrust clearance Standard 0.200 to 0.520 mm (0.00787 to 0.0205 in.)
Maximum 0.60 mm (0.0236 in.)
Connecting rod bearing Big end inside diameter Standard 61.991 to 62.022 mm (2.4406 to 2.4418 in.)
Maximum 62.06 mm (2.4433 in.)
Oil clearance Standard 0.031 to 0.082 mm (0.00122 to 0.00323 in.)
Maximum 0.20 mm (0.00787 in.)
Under size bearing diameter Standard 61.94 to 61.96 mm (2.4386 to 2.4394 in.)
U/S 0.25 61.69 to 61.71 mm (2.4287 to 2.4295 in.)
U/S 0.50 61.44 to 61.46 mm (2.4189 to 2.4197 in.)
U/S 0.75 61.19 to 61.21 mm (2.4090 to 2.4098 in.)
U/S 1.00 60.94 to 60.96 mm (2.3992 to 2.4000 in.)
Crankshaft pin 3.50 to 4.00 mm (0.1378 to 0.1575 in.)
Connecting rod bush Inside diameter Standard 37.035 to 37.045 mm (1.4581 to 1.4585 in.)
Maximum 37.10 mm (1.4606 in.)
Flywheel sub-assembly runout Maximum 0.15 mm (0.00591 in.)
Flywheel ring gear Clearance Standard 0.25 mm (0.00984 in.) or less
Piston pin Diameter Standard 36.989 to 37.000 mm (1.4563 to 1.4567 in.)
Minimum 36.96 mm (1.4551 in.)
Oil clearance Standard 0.035 to 0.056 mm (0.00138 to 0.00220 in.)
Maximum 0.08 mm (0.00315 in.)
Piston pin hole Inside diameter Standard 36.987 to 37.003 mm (1.4562 to 1.4568 in.)
Maximum 37.05 mm (1.4587 in.)
Oil clearance Standard -0.013 to 0.014 mm (-0.000512 to 0.000551 in.)
Maximum 0.05 mm (0.00197 in.)
Camshaft Journal outside diameter No. 1 56.95 to 56.97 mm (2.2421 to 2.2429 in.)
No. 2 56.75 to 56.77 mm (2.2343 to 2.2350 in.)
No. 3 56.55 to 56.57 mm (2.2264 to 2.2272 in.)
Journal inside diameter No. 1 57.035 to 57.135 mm (2.2455 to 2.2494 in.)
No. 2 56.835 to 56.935 mm (2.2376 to 2.2415 in.)
No. 3 56.635 to 56.735 mm (2.2297 to 2.2337 in.)
Oil clearance Standard 0.030 to 0.120 mm (0.00118 to 0.00472 in.)
Maximum 0.15 mm (0.00590 in.)
Camshaft bearing Inside diameter No. 1 57.0 mm (2.2441 in.)
No. 2 56.8 mm (2.2362 in.)
No. 3 56.6 mm (2.2283 in.)
Outside diameter No. 1 60.0 mm (2.3622 in.)
No. 2 59.8 mm (2.3543 in.)
No. 3 59.6 mm (2.3465 in.)
Valve rocker arm and shaft Bush inside diameter Standard 22.023 to 22.052 mm (0.8670 to 0.8681 in.)
Maximum 22.08 mm (0.8693 in.)
Shaft diameter Standard 21.959 to 21.980 mm (0.8645 to 0.8653 in.)
Minimum 21.92 mm (0.8630 in.)
Oil clearance Standard 0.043 to 0.093 mm (0.00169 to 0.00366 in.)
Maximum 0.15 mm (0.00591 in.)
Valve push rod Circle runout Maximum 0.30 mm (0.0118 in.)
Cylinder head set bolt Length Maximum 129 mm (5.07 in.)
Connecting rod bolt Length Standard 59.00 mm (2.3228 in.)
Maximum 61.5 mm (2.421 in.)
Cylinder liner Outside diameter Symbol A 106.982 to 106.989 mm (4.2119 to 4.2122 in.)
Symbol B 106.990 to 106.995 mm (4.2122 to 4.2124 in.)
Symbol C 106.996 to 107.004 mm (4.2124 to 4.2128 in.)
Inside diameter Standard 104.012 to 104.036 mm (4.0950 to 4.0959 in.)
Maximum 104.15 mm (4.1004 in.)
Protrusion Standard 0.01 to 0.08 mm (0.000394 to 0.00315 in.)
Maximum 0.08 mm (0.00315 in.)
Cylinder block Inside diameter Symbol A 107.000 to 107.008 mm (4.2126 to 4.2129 in.)
Symbol B 107.008 to 107.014 mm (4.2129 to 4.2131 in.)
Symbol C 107.014 to 107.022 mm (4.2131 to 4.2135 in.)
Warpage Maximum 0.10 mm (0.00394 in.)
Straight pin (cylinder block) Protrusion height Pin A 6.0 mm (0.236 in.)
Pin B 13.0 mm (0.512 in.)
Pin C 16.0 mm (0.630 in.)
Pin D 6.0 mm (0.236 in.)
Piston Diameter Standard 103.936 to 103.952 mm (4.0920 to 4.0926 in.)
Oil clearance Standard 0.06 to 0.1 mm (0.00236 to 0.00394 in.)
Ring groove clearance 1st 0.11 to 0.15 mm (0.00433 to 0.00591 in.)
2nd 0.07 to 0.11 mm (0.00276 to 0.00433 in.)
Oil 0.02 to 0.06 mm (0.000787 to 0.00236 in.)
Maximum 0.30 mm (0.0118 in.)
Ring groove width Standard 1st 2.58 to 2.60 mm (0.1016 to 0.1024 in.)
2nd 2.06 to 2.08 mm (0.0811 to 0.0819 in.)
Oil 4.01 to to 4.03 mm (0.1579 to 0.1587 in.)
Maximum 1st 3.10 mm (0.1220 in.)
2nd 2.20 mm (0.0866 in.)
Oil 4.08 mm (0.1606 in.)
Ring thickness Standard 1st 2.47 to 2.49 mm (0.0972 to 0.0980 in.)
2nd 1.97 to 1.99 mm (0.0776 to 0.0783 in.)
Oil 4.97 to to 4.99 mm (0.1957 to 0.1965 in.)
Minimum 1st 2.32 mm (0.0913 in.)
2nd 1.82 mm (0.0717 in.)
Oil 4.95 mm (0.1949 in.)
Crankshaft Thrust clearance Standard 0.050 to 0.220 mm (0.00197 to 0.00866 in.)
Maximum 0.40 mm (0.0157 in.)
Runout Maximum 0.04 mm (0.00157 in.)
Main journal outside diameter Standard 72.94 to 72.96 mm (2.8717 to 2.8724 in.)
Minimum 71.76 mm (2.8252 in.)
Maximum taper and out-of-round 0.01 mm (0.000394 in.)
Crankshaft pin outside diameter Standard 61.94 to 61.96 mm (2.4386 to 2.4394 in.)
Minimum 60.76 mm (2.3921 in.)
Maximum taper and out-of-round 0.01 mm (0.000394 in.)
Crankshaft No. 4 journal dimension Standard 34.00 to 34.08 mm (1.3386 to 1.3417 in.)
Maximum 34.48 mm (1.3574 in.)
Crankshaft bearing cap set bolt Length Standard 92.80 to 93.80 mm (3.6535 to 3.6929 in.)
Maximum 95.00 mm (3.7401 in.)
Crankshaft bearing cap Bearing cap inside diameter Standard 77.985 to 78.00 mm (3.0703 to 3.0709 in.)
Maximum 78.20 mm (3.0787 in.)
Bearing inside diameter Standard 73.01 to 73.04 mm (2.8744 to 2.8756 in.)
Maximum 73.30 mm (2.8858 in.)
Oil clearance Standard 0.051 to 0.102 mm (0.00201 to 0.00402 in.)
Maximum 0.20 mm (0.00787 in.)
Under size bearing diameter Standard 72.94 to 72.96 mm (2.8717 to 2.8724 in.)
U/S 0.25 72.69 to 72.71 mm (2.8618 to 2.8626 in.)
U/S 0.50 72.44 to 72.46 mm (2.8520 to 2.8528 in.)
U/S 0.75 72.19 to 72.21 mm (2.8421 to 2.8429 in.)
U/S 1.00 71.94 to 71.96 mm (2.8323 to 2.8330 in.)
Main crankshaft journal 3.00 to 3.50 mm (0.1181 to 0.1378 in.)