Usage:
SAE STANDARD ROTATION ENGINE ILLUSTRATION
Auxiliary Drive at upper left turns counterclockwise (view from front) at 1.92 times engine speed.
(1) Water pump drive:
Turns clockwise (view from front) at 1.92 times engine speed.
Diameter of shaft bearing surface (journal) ... 1.2455 ± .0005 in.(31.636 ± 0.013 mm)
Bore in bearing in retainer ... 1.2475 ± .0020 in.(31.687 ± 0.051 mm)
Maximum permissible clearance between shaft bearing surface (journal) and bearing ... .008 in.(0.20 mm)
(2) Bore in bearing in main idler gear ... 2.9990 ± .0015 in.(76.175 ± 0.038 mm)
Diameter of bearing surface (journal) of shaft ... 2.9965 ± .0005 in.(76.111 ± 0.013 mm)
Maximum permissible clearance between bearing and bearing surface (journal) of the shaft ... .010 in.(0.25 mm)
End clearance ... .005 to .014 in.(0.13 to 0.36 mm)
Maximum permissible end play for the gear ... .018 in.(0.46 mm)
(3) Torque for 5/16" bolts holding oil line flange ... 32 ± 3 lb. ft.(43 ± 4 N·m)
(4) Bore in bearings for small idler gears ... 2.0000 ± .0015 in.(50.800 ± 0.038 mm)
Diameter of bearing surface (journal) of shaft ... 1.9980 ± .0005 in.(50.749 ± 0.013 mm)
Maximum permissible clearance between bearing and bearing surface (journal) of shaft ... .008 in.(0.20 mm)
End clearance for idler gears ... .003 to .014 in.(0.08 to 0.36 mm)
Maximum permissible end play of idler gear ... .018 in.(0.46 mm)
(5) Torque for bolt ... 35 ± 5 lb. ft.(45 ± 7 N·m)
(6) Oil pump drive:
Turns clockwise (view from front) at 1.5 times engine speed.
Bore in bearing for gear of oil pump ... 2.1245 ± .0020 in.(53.962 ± 0.051 mm)
Diameter of bearing surface (journal) on gear hub ... 2.1205 ± .0005 in.(53.861 ± 0.013 mm)
(7) Torque for 1/2" bolts holding main idler shaft ... 90 ± 5 lb. ft.(120 ± 7 N·m)
(8) Crankshaft gear.
(9) Bore in bearing for balance gear ... 1.6022 ± .0003 in.(40.696 ± 0.008 mm)
Diameter of bearing surface (journal) of shaft ... 1.5998 ± .0002 in.(40.635 ± 0.005 mm)
Maximum permissible clearance between bearing and bearing surface (journal) of shaft ... .006 in.(0.15 mm)
End play of balance gear ... .0060 to .0135 in.(0.152 to 0.343 mm)
Maximum permissible end play of balance gear ... .019 in.(0.48 mm)
SAE OPPOSITE ROTATION TIMING MARKS FOR D379 ENGINE
(10) Torque for 1/2" bolts holding small idler shafts ... 90 ± 5 lb. ft.(120 ± 7 N·m)
Torque for 3/8" bolts holding small idler shafts ... 40 ± 4 lb. ft.(55 ± 5 N·m)
(11) Torque for five 1/2" bolts holding plate to block ... 90 ± 5 lb. ft.(120 ± 7 N·m)
(12) Left side lower or auxiliary water pump drive:
Turns counterclockwise (view from front) at 1.55 times engine speed.
Bore in bearing for auxiliary water pump shaft ... 1.2475 ± .0020 in.(31.687 ± 0.051 mm)
Diameter of bearing surface (journal) of shaft ... 1.2455 ± .0005 in.(31.636 ± 0.013 mm)
Maximum permissible clearance between bearing and bearing surface (journal) of shaft ... .008 in.(0.20 mm)