ABOUT THE MACK MP8 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, a Diesel Particulate Filter (DPF) system and the Holset Variable Geometry Turbocharger (VGT). The PowerLeash™ engine brake is optional. The engine conforms to year 2007 Environmental Protection Agency (EPA) requirements. 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.
A wide range of the current transmission offerings, including manual, automated manual and automatic, can be teamed with the MP8. The MP8 EGR system features reduced restriction plus enhanced efficiency and reliability. Its venturi system is easy to service. Diagnostic help can be found in the Tech Tool. To obtain the Tech Tool, contact your local MACK dealer. A DPF system requires elevated exhaust temperatures. The system uses a diesel oxidation catalyst, a diesel particulate filter and in-line reheating of the exhaust gases. The DPF system removes Particulate Matter (PM) from the exhaust to conform to the 2007 EPA regulations.
The engine weighs approximately 1160 kg (2560 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 Page 9 INTRODUCTION