Basic specs are free and open to everyone They usually include: engine images, displacement, dimensions and weight, essential bolt tightening torques, characteristics of the engine e.g. its power and torque. Essential bolt tightening torques are: main bearing cap bolts connecting rod cap bolts cylinder head bolts
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Mack E7 engine Connecting Rod Nut torque 60-65 lb.ft, 82-88 Nm click for Mack E7 engine specs and manuals
Mack E7 engine, Main Bearing Bolt torque 115-125 lb.ft, 156-170 Nm click for Mack E7 engine specs and manuals
Mack E7 engine, Cylinder Head Bolt torque Step 1 = 90 lb.ft, 122 Nm Step 2 = 100 lb.ft, 136 Nm Final step = 110 lb.ft, 150 Nm click for Mack E7 engine specs and manuals
Mack E7 engine, Displacement, Bore, Stroke, Compression Ratio Bore 4.875 inches 123.83 mm Stroke 6.5 inches 165.1 mm Displacement 728 CID, 12.0 liter Compression Ratio up 375 hp = 16.5:1 above 375 hp = 15.3:1 click for Mack E7 engine specs and manuals
Mack E7 engine, Power, Torque, Weight Power E7-250 250 hp, 186 kW @1950 rpm E7-350 350 hp, 261 kW @1800 rpm E7-460 460 hp, 343 kW @1950 rpm Torque E7-250 975 lb.ft, 1306 Nm @1200 rpm E7-350 1277 lb.ft, 1711 Nm @1250 rpm E7-460 1660 lb.ft, 2224 Nm @1200 rpm Weight 2210 lb, 1003 kg click for Mack E7 engine specs and manuals
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