i g GENERAL DATA (lSG/lSGA) ENGINE Type . Number of cylinders Bore Stroke Capacity Combustion chamber volume (valves tted). Firing order Valve operation Compression ratio: H.C. L.C.- Compression pressure: H.C. L.C. Torque: H. C. L. C. Engine idle speed (approx.) Oversize bore: First Max. Crankshaft Main journal diameter Crankpin journal diameter Crankshaft end-thrust Crankshaft end-oat . . Main bearings Number and type Material Length . . . . Diametrical clearance .. Undersizes Connecting rods Type . . . Length between centres Big-end bearings Type .. Material Length . . Diametrical clearance . . Undersizes End-oat on crankpin (nominal) Pistons Type Clearance' 1n cylinder. Top Bottom Number of rings . . . . Width of ring grooves: Top. Second Third Oil control .. Gudgeon pin bore MGB. Issue 7. 80619 47 18G, 186A. 4. 3-16 in. (80-26 mm.). 3-5 in. (89 mm.). 1798 c.c. (109-8 cu. in.). 42-5 to 43-5 c.c. (2-59 to 2-65 cu. in.). 1, 3, 4, 2. Overhead by push-rod. 8-8 : 1. 8-0 : 1. 160 lb./sq. in. (11-25 kg./cm.). 130 lb./sq. in. (9-15 kg./cm.). 110 lb. ft. (15-2 kg. m.) at 3,000 r.p.m. 105 lb. ft. (14-5 kg. m.) at 3,000 r.p.m. 500 r.p.m. -010 in..(-254 mm.). 040 in. (1016 mm.). 21262 to 2127 in. (54-01 to 54-02 mm.). 1-8759 to 1-8764 in. (47-648 to 47-661 mm.). Taken on thrust washers at centre main bearing. -004 to -005 in. (~10 to -13 mm.). Three thinwall. Steel-backed copper-lead. 1% in. (28-5 mm.). -001 to -0027 in. (0254 to -068 mm.). -010, -020, --030 and - 040 in. (-254, -762 and 1-016 mm.). Angular-split big-end, split clamp small-end. 6-5 in. (165-1 mm.). Shell. Steel-backed copper-lead. -995 to 1-005 in. (25-2 to 25-52 mm.). -001 to -0027 in. (-0254 to -068 mm.). "-010, .-020, -030 and -040 in. (-254, ~-762 and 1-016 mm.). .. -008 to 012 in. (-20 to -30 mm.). Aluminium solid skirt. -0036 to -0045 in. (091 to ~121 mm.). 0018 to 0024 in. (-045 to -060 mm.). 4 (3 compression, 1 oil control). } '064 to -065 in. (1625 to 1-651 mm.). -1578 to -1588 in. (4-008 to 4033 mm.). '7501 to -7503 in. (19-052 to 19-057 mm.). - 608*, -508, General Data 1