A Studebaker Reference Guide

1949-53 Truck
2R Series

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Truck Model Year Engine Used Engine Model Cooling Cap. Qts.
2R5 1949-53 own 1R 10
2R6 1950-53 own 6R 10
2R10 1949-53 own 1R 10
2R11 1951-53 own 6R 10
2R14 1950-53 own 6R 10
2R15 1949-53 own 2R 10
2R16 1949-50 own 3R 15
2R16A 1949-53 own 4R 15
2R16B 1951-53 own 4R 15
2R17 1949-50 own 3R 15
2R17A 1949-53 own 4R 15
2R17B 1951-53 own 4R 15

Serial Number Plate Location: On seat riser, left side

Engine Number Location: 6 cyl - At the top left side front corner of the cylinder block. 8 cyl - On top, front end of cylinder block next to oil filler tube.

Production Information: n/a

General Engine Specifications:
Engine Model # of Cyl - Bore & Stroke Displacement Compression Max Torque H.P. Max Brake H.P. Oil Capacity Qts.
1R 6 - 3 x 4 170 7.00 134@1600 85@4000 5
2R 6 - 3 x 4 170 7.00 134@1600 85@4000 5
3R 6 - 3 5/16 x 4 3/8 226 6.50 174@1200 94@3600 6
4R 6 - 3 5/16 x 4 3/4 246 7.00 201@1200 102@3200 6
6R 6 - 3 5/16 x 4 3/4 246 7.00 201@1200 102@3600 6

Engine Tune-Up Specifications:
Model Firing Order Spark Plug Gap Point Gap Valve Seat Angle Intake Tappet Exhaust Tappet Intake Stem Clearance Exhaust Stem Clearance Valve Spring Pressure lb @ inch
1R 153624 .025 .020 45 .016C .016C .002-.0035 .0025-.0035 79 @ 1 7/16
2R 153624 .025 .020 45 .016C .016C .002-.0035 .0025-.0035 79 @ 1 7/16
3R 153624 .025 .020 45 .016C .016C .002-.0035 .0025-.0035 130 @ 1 3/4
4R 153624 .025 .020 45 .016C .016C .002-.0035 .0025-.0035 130 @ 1 3/4
6R 153624 .025 .022 45 .016C .016C .002-.0035 .0025-.0035 130 @ 1 3/4

Piston, Rings & Bearings:
Model Piston Clearance Comp. Ring Gap Oil Ring Gap Crankpin Dia. Rod Bearing Clearance Main Journal Dia. Main Bearing Clearance Crank Endplay
1R .002 .007 .007 1.81175 - 1.81275 .0005 - .002 2.437 - 2.4375 .0005 - .0025 .003 - .006
2R .002 .009 .009 1.81175 - 1.81275 .0005 - .002 2.437 - 2.4375 .0005 - .0025 .003 - .006
3R .002 .009 .009 2.18675 - 2.18775 .0005 - .002 2.4995 - 2.5000 .0005 - .0025 .003 - .006
4R, 6R .002 .009 .009 2.18675 - 2.18775 .0005 - .002 2.8745 - 2.8750 .0006 - .0027 .003 - .006

Table of Contents | Chapter 6 - Studebaker Trucks