| Lubricants and Sealants |
| Multi-Purpose Grease XG-4 |
ESR-M1C159-A and ESB-M1C93-A |
| SAE 15W-40 Super Heavy Duty Motor Oil WSS-M2C171-C |
XO-15W-40-QSD |
| Rust Penetrant and Inhibitor XL-1 |
ESR-M99C56-A |
| RTV Silicone Sealant F5TZ-19G204-AB |
NAVSTR SLR |
| Pipe Sealant with Teflon® XW7Z-19554-AA |
WSK-M2G250-A2 |
| Engine |
| Displacement |
7.3L (444 cubic inches) |
| Number of cylinders |
8 |
| Bore |
4.11 |
| Stroke |
4.18 |
| Firing order |
1-2-7-3-4-5-6-8 |
| Oil pressure |
276-482 kPa (40-70 psi) |
| Oil capacity |
12.3L (13.0 quarts) |
| Compression ratio |
17.5 to 1 |
| Cylinder Head and Valve Train |
| Cylinder head gasket surface flatness |
0.025 mm (0.001 in) in 2 in. 0.10 mm (0.004 in) overall |
| Cylinder head gasket surface finish |
63-125 RMS |
| Combustion chamber volume |
- |
| Valve arrangement (front to rear) - LH |
I-E-I-E-I-E-I-E |
| Valve arrangement (front to rear) - RH |
E-I-E-I-E-I-E-I |
| Valve guide bore diameter |
0.3141-0.3151 in |
| Valve stem diameter |
7.921-7.939 mm (0.31185-0.31255 in) |
| Valve stem-to-guide clearance (max.) |
0.140 mm (0.0055 in) |
| Valve head diameter |
- |
| Valve face runout |
0.050 mm (0.002 in) |
| Valve face angle - intake |
30 degrees |
| Valve face angle - exhaust |
37.5 degrees |
| Valve seat width |
1.651-2.413 mm (0.065-0.095 in) |
| Valve seat runout (max.) |
0.05 mm (0.002 in) |
| Valve seat angle - intake |
30 degrees |
| Valve seat angle - exhaust |
37.5 degrees |
| Valve spring free length (approx.) |
52.70 ± 3.8 mm (2.075 ± 0.150 in) |
| Valve spring squareness (max.) |
1.981 mm (0.078 in) |
| Valve spring compression pressure |
32-35 kg @ 46.55 mm (71-79 lbs @ 1.833 in) 102-112 kg @ 34.35 mm (225-249 lbs. @ 1.352 in) |
| Valve spring installed height - intake |
44.881 mm (1.767 in) |
| Valve spring installed height - exhaust |
46.558 mm (1.833 in) |
| Valve spring installed pressure |
- |
| Roller follower ratio |
- |
| Rocker arm ratio |
- |
| Hydraulic Lash Adjuster |
| Diameter |
23.391-23.411 mm (0.9209-0.9217 in) |
| Clearance-to-bore |
0.027-0.086 mm (0.0011-0.0034 in) |
| Service limit |
0.005 |
| Hydraulic leakdown rate |
18-90 sec. for 3.17 mm (0.125 in) travel |
| Collapsed lash adjuster gap |
4.69 mm (0.185 in) max. |
| Camshaft |
| Theoretical valve lift @ 0 lash |
- |
| Lobe lift - intake |
6.44 mm (0.2535 in) max. |
| Lobe lift - exhaust |
6.43 mm (0.2531 in) max. |
| Allowable lobe lift loss |
- |
| Journal diameter |
- |
| Camshaft journal bore inside diameter |
- |
| Camshaft journal-to-bearing clearance |
0.051-0.165 mm (0.002-0.006 in) |
| Runout |
- |
| End play |
0.051-0.203 mm (0.002-0.008 in) |
| Cylinder Block |
| Cylinder bore diameter |
104.384-104.402 mm (4.1096-4.1103 in) |
| Cylinder bore maximum taper |
0.076 mm (0.003 in) |
| Cylinder bore maximum out-of-round |
0.0508 mm (0.002 in) |
| Main bearing bore inside diameter |
84.206-84.231 mm (3.3152-3.3162 in) |
| Camshaft bearing bore inside diameter |
- |
| Head gasket surface flatness |
0.025 mm (0.001 in) any 2 in 0.004 in overall |
| Head gasket surface finish |
63-125 RMS |
| Crankshaft |
| Main bearing journal diameter - standard |
79.139-79.340 mm (3.1228-3.1236 in) |
| Main bearing journal diameter - 0.010 undersize |
79.065-79.085 mm (3.01128-3.01136 in) |
| Main bearing journal diameter - 0.020 undersize |
78.811-78.831 mm (3.1028-3.1036 in) |
| Main bearing journal diameter - 0.030 undersize |
78.557-78.577 mm (3.0928-3.0936 in) |
| Main bearing journal maximum taper |
0.0038 mm (0.00015 in) |
| Main bearing journal maximum out-of-round |
0.0056 mm (0.00022 in) |
| Main bearing journal-to-cylinder block clearance |
- |
| Connecting rod journal diameter - standard |
63.45-63.47 mm (2.4980-2.4990 in) |
| Connecting rod journal diameter - |
0.010 undersize 63.20-63.22 mm (2.488-2.489 in) |
| Connecting rod journal diameter - 0.020 undersize |
62.94-62.96 mm (2.478-2.479 in) |
| Connecting rod journal diameter - 0.030 undersize |
62.69-62.71 mm (2.468-2.469 in) |
| Connecting rod journal maximum taper (per inch maximum) |
0.0066 mm (0.00026 in) |
| Connecting rod journal maximum out-of-round |
0.0056 mm (0.00022 in) |
| Crankshaft maximum end play |
0.063-0.216 mm (0.0025-0.0085 in) |
| Piston and Connecting Rod |
| Piston diameter - standard |
104.26065 mm (4.10475 in) |
| Piston diameter - 0.250 mm (0.010 in) oversize |
104.51465 mm (4.11475 in) |
| Piston diameter - 0.500 mm (0.020 in) oversize |
104.76865 mm (4.12475 in) |
| Piston diameter - 0.750 mm (0.030 in) oversize |
105.02265 mm (4.13475 in) |
| Piston-to-cylinder bore clearance |
- |
| Piston ring end gap |
- |
| Piston ring groove width |
- |
| Piston ring width |
- |
| Piston ring-to-groove clearance |
- |
| Piston pin bore diameter |
33.235-33.248 mm (1.3085-1.3088 in) |
| Piston pin diameter |
33.220-33.226 mm (1.3079-1.3081 in) |
| Piston pin length |
75.9-76.2 mm (2.99-3.00 in) |
| Piston pin-to-piston fit |
0.007-0.018 mm (0.0003-0.0007 in) |
| Piston-to-connecting rod clearance |
- |
| Connecting rod-to-pin clearance |
- |
| Connecting rod pin bore diameter |
- |
| Connecting rod length (center-to-center) |
181.10 mm (7.130 in) |
| Connecting rod maximum allowed bend |
0.025 mm (0.001 in) |
| Connecting rod maximum allowed twist |
0.05 mm (0.002 in) |
| Connecting rod bearing bore diameter |
68.339-68.364 mm (2.6905-2.6915 in) |
| Connecting rod bearing-to-crankshaft clearance |
0.038-0.114 mm (0.0015-0.0045 in) |
| Connecting rod side clearance |
0.30-0.61 mm (0.012-0.024 in) |