CNH 4.5 Engine Specifications

Four Cylinder Diesel 
Direct Injected
Arrangement: In-Line
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Bore: 104MM  
Stroke: 132MM  
Displacement: 4.5 Liter  ( 4485 cm3 )
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Bore: 4.10 Inch Nominal 4.09 Inch
Stroke: 5.20 Inch Nominal 5.19 Inch 
4.10 X 5.20 Inches ( 4.09 in X 5.19 in ) 
Displacement: 274 Cubic Inches 
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Standard Bore Size: 104 MM - 104.024 MM 
Standard Piston Diameter: 103.730 MM - 103.748 MM
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0.40MM Oversize Bore Size: 104.40 MM - 104.424 MM
0.40MM Oversize Piston Diameter: 104.13 MM - 104.148 MM
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0.80MM Oversize Bore Size: 104.80 MM - 104.824 MM 
0.80MM Oversize Piston Diameter: 104.53 MM - 104.548 MM 
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Note: it is recommended to confirm oversize piston availability
before performing block machine work. 
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Piston to Cylinder wall clearance: 0.252 MM - 0.294 MM 
Piston Protrusion from top of block: 0.28 MM - 0.52 MM 
Piston Pin Diameter: 37.994 MM - 38.000 MM 
Top Piston Ring Groove: 2.705 MM - 2.735 MM
2nd Piston Ring Groove: 2.440 MM - 2.460 MM
Bottom Piston Ring Groove: 4.030 MM - 4.050 MM 
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Top Piston Ring height 2.560 MM - 2.605 MM
2nd Piston Ring height 2.350 MM - 2.380 MM
Bottom Piston Ring height 3.970 MM - 3.990 MM 
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Top Piston Ring side clearance  0.100 MM - 0.175 MM
2nd Piston Ring side clearance 0.060 MM - 0.110 MM
Bottom Piston Ring side clearance 0.040 MM - 0.080 MM 
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Top Piston Ring end gap in cylinder: 0.30 MM - 0.40 MM
2nd Piston Ring end gap in cylinder: 0.60 MM - 0.80 MM 
Bottom Piston Ring end gap in cylinder: 0.30 MM - 0.55 MM 
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Piston Pin Bushing Inside Diameter: 38.019 MM - 38.033 MM 
Crankshaft Main Bearing Journal Diameter: Standard 82.991 MM - 83.012 MM
Crankshaft Main Bearing Journal Diameter: 0.25MM Undersize 82.741 MM - 82.762 MM 
Crankshaft Main Bearing Journal Diameter: 0.50MM Undersize 82.491 MM - 82.512 MM
Crankshaft Main Bearing Journal Diameter: 0.75MM Undersize 82.241 MM - 82.262 MM
Crankshaft Main Bearing Journal Diameter: 1.00MM Undersize 81.991 MM - 82.012 MM
Crankshaft Rod Bearing Journal Diameter: Standard 68.988 MM - 69.012 MM  
Crankshaft Rod Bearing Journal Diameter: 0.25MM Undersize 68.738 MM - 68.762 MM
Crankshaft Rod Bearing Journal Diameter: 0.50MM Undersize 68.488 MM - 68.512 MM 
Crankshaft Rod Bearing Journal Diameter: 0.75MM Undersize 68.238 MM - 68.262 MM
Crankshaft Rod Bearing Journal Diameter: 1.00MM Undersize 67.988 MM - 68.012 MM
Note: it is recommended to confirm bearings availability
before performing crankshaft machine work. 
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Thrust Plate Thickness: 37.28MM - 37.38MM 
Crankshaft End Play: .0131MM - .0349MM
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Tightening Torque:
Torque Conversion
1 Nm = 0.1019 kgm
1 Nm = 0.737 ft lbs
1 Nm = 8.851 inch lbs 
1 kgm = 9.81 Nm
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Main Bearing Cap Torque Values: 
Stage 1 - 5.0 kgm
Stage 2 - 8.0 kgm
Stage 3 - 90 degrees
Oil Clearance between main bearing and crankshaft journal after proper torque: 
Journal #1 and Journal #5 : .064MM - .095MM 
Journal #2, Journal #3, Journal #4, : .059MM - .0.100MM 
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Connecting Rod Bearing Cap Torque Values ( for bolt size M11 X 1.25) :
Stage 1 - 3.0 kgm
Stage 2 - 6.0 kgm 
Stage 3 - 60 degrees 
Oil Clearance between connecting rod bearing and crankshaft journal after proper torque: .033MM - .041MM 
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Head Bolt Torque Values: 
M12 X 70MM - 5.0 kgm plus 90 degrees
M12 X 140MM - 4.0 kgm plus 180 degrees 
M12 X 180MM - 7.0 kgm plus 180 degrees 
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Head Bolt Torque Sequence picture:
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Intake Valve Clearance: 025MM
Exhaust Valve Clearance: 0.50MM 
Camshaft Bushing Inside Diameter: 54.083MM - 54.147MM 
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To request a quote for an Engine ReRing Kit or Engine Overhaul Kit send your request by email to: parts@cnh45.com 
or use our contact form: http://www.wwpartssource.com/ 
and remember to include your full engine numbers.
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