Mack E7, Service Manual, Page: 33 / 303

200 SPECIFICATIONS
Page 2-3
Connecting rods Forged steel, I-beam with tapered pin end, 35-degree cap angle, 10.4 inches
(26.42 cm) center-to-center length
Crankshaft Drop-forged, medium carbon steel, elotherm hardened journals and fillets, eight
integral counterweights, 3.25 inch (8.26 cm) piston journal diameter, 4.5 inch
(11.43 cm) main journal diameter
Bearings
— Main Steel-backed, lead-tin overlay
— Rod Steel-backed, lead-tin overlay deltawall
Vibration damper Viscous fluid filled
Camshaft Carbon steel, carburized journals and lobes, gear driven
Valves
— Inlet 30-degree face angle (before November 1996), 20-degree face angle
(November 1996 and later), poppet with positive rotator, two per cylinder
— Exhaust 30-degree face angle, poppet with positive rotator, two per cylinder
Valve lifters Mushroom type, durafaced (tungsten carbide)
Oil filters Spin-on, disposable (two); Centri-Max
®
centrifugal filter (one)
Oil pan (isolating)
— 240GB5240M Used as either front or rear sump by reversing pan.
— 240GC5240M2 Same as 240GB5240M except for the addition of three bosses located in the
front of oil pan, one each for oil temperature sensor, turbocharger unloader and
tandem air compressor
— 240GB5240M3 Same as 240GB5240M2 except it is for a rear sump
— 240GB5420M4 Used as either front or rear sump, includes five bosses to accept all variations
Air compressor Flange mounted, gear driven, engine oil lubricated, water cooled (integral to
engine coolant system) (Bendix or Holset)
Turbocharger Exhaust gas driven, radial flow, engine oil lubricated (Schwitzer or Garrett)
Lubrication system Full pressure, wet sump, 33.5 quart (32 L) capacity, 25,000 mile (40,225 km)
highway/300 hour stop-and-go change interval, MACK approved EO-L oil.
Valve seat inserts Pressed-in cylinder heads (30
°
inlet seat before November 1996, 20
°
inlet
seat after November 1996, 30
°
exhaust seat)
Manifolds
— Air inlet Two-piece, six-port
— Exhaust Three-piece, six-port
— Coolant Two-piece, four-port
Injection pump Robert Bosch, P7100 fixed timing, Bosch LDA. V-MAC engines use P8500,
multiple plunger, flange mounted, gear driven, with variable timing by
Econovance
Injection nozzles Refer to Tune-Up Specifications manual.
Fuel filters Spin-on, disposable
Water pump Centrifugal-rotor, belt driven
Coolant conditioner Spin-on, disposable
Thermostat 180 ° F (82 ° C), with rubber seated flange seal and caged check ball
Engine Features (Cont.)
Component Description
5-101.bk Page 3 Friday, March 17, 2006 11:05 AM