The Official Studebaker Reference Guide 1941-48 Truck M Series No pictures at this time Truck Model Year Engine Used Engine Model Cooling Cap. Qts. M5 1941 - 48 own 1M 10 M15 1941 - 42 own 2M 10 M15A 1946 - 48 own 2M 10 M15T 1941 - 42 own 2M 10 M15 - 20 1945 own 2M 10 M15 - 28 1945 own 2M 10 M16 1941 - 48 own 3M 13 Serial Number plate Location: n/a. 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. 1M 6 - 3 x 4 170 6.50 134@2000 80@4000 5 2M 6 - 3 x 4 170 6.50 134@2000 80@4000 5 3M 6 - 3 5/16 x 4 3/8 226 6.50 176@1600 94@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 1M 153624 .025 .020 45 .016C .016C .002-.0035 .0025-.0035 79 @ 1 7/16 2M 153624 .025 .020 45 .016C .016C .002-.0035 .0025-.0035 79 @ 1 7/16 3M 153624 .025 .020 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 1M .002 .007 .007 1.81175 - 1.81275 .0005 - .002 2.437 - 2.4375 .0005 - .0025 .003 - .006 2M .002 .009 .009 1.81175 - 1.81275 .0005 - .002 2.437 - 2.4375 .0005 - .0025 .003 - .006 3M .002 .009 .009 2.18675 - 2.18775 .0005 - .002 2.4995 - 2.5000 .0005 - .0025 .003 - .006 Table of Contents | Chapter 6 - Studebaker Trucks