Engine Clearance A minimum of 40.64 mm (1.6 in) of clearance should be maintained around the engine. Additionally, no equipment should be installed that would restrict air flow through the radiator or to the engine air intake. W2031928 Fig. 1 Allow Sufficient Clearance Around Engine A. 40.64 MM (1.6 in) Minimum Mack Body Builder Instructions PI / CHU, AN / CXU, GR / GU, TD, LR, TE / MRU USA141023213 Date 2.2018 Body Builder; Engine, MP7, MP8, and MP10 Page 9 (40) All Rights Reserved