ABOUT THE MACK MP8 EURO 4 ENGINE [200 EA] 1 Figure 1 — MACK MP8 Engine — for Conventional Chassis The MACK MP8 is a 13 liter (800 CID) engine with electronic unit injectors, a cooled Exhaust Gas Recirculation (EGR) system and the Holset Variable Geometry Turbocharger (VGT). The PowerLeash™ engine brake is optional. The engine conforms to Euro 4 emissions requirements. A wide range of the current transmission offerings, including manual, automated manual and automatic, can be teamed with the MP8. Diagnostic help can be found in the Premium/Volvo Tech Tool. In some markets the diagnostic tool is Premium Tech Tool (PTT) and in other markets the diagnostic tool is Volvo Tech Tool (VTT).
Contact your local dealer for Tech Tool availability. The MP8 EGR system features reduced restriction plus enhanced efficiency and reliability. Its venturi system is easy to service. The engine weighs approximately 1200 kg (2646 lb.) dry (with air compressor, without oil, coolant, starter, fan, alternator and clutch). Its design includes a one-piece cylinder head, a single overhead camshaft, three rocker arms per cylinder, unit injectors and no pushrods. PowerLeash™ engine braking, requiring a fourth rocker arm, is optional. Monosteel™ steel pistons are made in one piece. The Holset VGT features fixed vanes with a sliding nozzle ring.
The nozzle position is infinitely variable between open and closed. This design reacts quickly to exhaust pressure and controls inlet pressure more precisely. Reliability is enhanced by having fewer moving parts. Its actuator and bearing housing are water cooled and engine oil lubricated for greater durability. Page 9 INTRODUCTION