Scania DS11 / DN11 Diesel Engine Factory Service Manual (P/N 1-80 06 30 SP, 1980)

• Official 67-page Scania OEM publication (1-80 06 30 SP, dated 1980)
• Covers DN11 and DS11 11-liter inline-six diesel engines for both truck and stationary applications
• Details critical service intervals and internal engine tolerances for precise rebuilding
• Contains 49 technical diagrams, 44 detailed torque specifications, and 9 lubrication system schematics
• Serves as the factory-authorized reference for major engine overhauls and diagnostic adjustments

Engine Systems and Service Coverage

This Scania OEM workshop manual delivers the factory-specified data required to rebuild the 11-liter inline-six engine family. It outlines primary operational systems, starting with the turbocharger assembly, crankcase ventilation, and lubrication circuits. You get an in-depth breakdown of the cylinder block. This includes wet cylinder liner specifications, exact piston configuration, and cooling nozzle positioning. The cylinder head section meticulously details valve train geometry alongside seat machining angles. It also covers rocker shaft assembly parameters for both naturally aspirated and turbocharged setups. Always adhere to standard workshop safety protocols when handling high-pressure diesel injection lines or heavy rotating assemblies to prevent injury and equipment damage.

Precision Data and Tolerances

Accurate tolerances make the difference between a reliable rebuild and premature failure. This document provides precise measurements for crankshaft grinding, main bearing clearances, and connecting rod dimensions. Valve timing specifications for both the DN11 and DS11 variants are clearly mapped out in reference tables. Intake and exhaust lift values are officially documented at 14.6 mm. You will find cylinder head bolt torque sequences laid out in a three-stage process, ranging from 120 Nm up to 300 Nm depending on fastener size. Need to verify oil pressure? The lubrication system must maintain 4.5 to 6.0 bar at 2,200 rpm on a fully warmed engine. Furthermore, crankshaft main bearing journal diameters are listed across seven specific undersize stages. This allows machinists to perfectly match replacement bearings during a comprehensive overhaul.