5-101.bk Page 4 Friday, March 17, 2006 11:05 AM Good Shop Practice — Fasteners For additional information on tune-up specifications for 1992 and 1993 E7 V-MAC engines, refer to 1992 MACK Engine Tune-Up Specifications No. 5-304ID92 and V-MAC Service Manual No. 8-201. For information on 1993 V-MAC E7 engine, refer to 1993 MACK Engine Tune-Up Specifications No. 5-305ID93. Make sure that all components are clean and free from foreign material or corrosion. Use suitable tools and assembly procedures to prevent permanent damage to the engine components. Metric fasteners are used on the E7 engine with a few exceptions.
The exceptions are fasteners with English threads, as noted in the charts that follow. Patchlock/Hyloc fasteners follow the same guidelines as standard fasteners. All 1992 engine models use 1991 injection nozzles except 1992 EM7-300 V-MAC with 20-degree Econovance, No. 710GB51AM. 1992 EM7-300 models with 20-degree Econovance use nozzle holder assembly No. 736GB343P4 and nozzle tip No. 114GC325P3. 1992 EM7-300 V-MAC models with 10-degree Econovance, No. 710GB416CM, use 1991 EM7-300 V-MAC injection nozzles. A calibrated manual torque wrench is required to tighten the fasteners listed in the charts.
Threads, washers and underhead of screws or washer face of nuts should be lubricated with engine oil, unless otherwise specified. Some designs require individual consideration and may deviate from torque guidelines in this manual. Performance Specifications (Oil Pressure and Intake Manifold Temperature) *Dependent on outside air temperature and vehicle speed. Page 2-4 200 SPECIFICATIONS Description 650 rpm (idle) 1200 rpm 1750 rpm Full Load (Peak Torque rpm) Oil pressure — Cool engine — Warm engine 20 psi (138 kPa) 15 psi (103 kPa) 45 psi (310 kPa) 30 psi (207 kPa) 65 psi (448 kPa) 45 psi (310 kPa) — — Intake manifold temperature Outside air temperature — — 100–140°F* (38–60°C)