The Official Studebaker Reference Guide 1949-53 Truck 2R Series 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