Austin Healey Sprite – M. G. Midget CRITICAL NUT & BOLT TORQUES

Austin Healey Sprite – M. G. Midget

CRITICAL NUT & BOLT TORQUES

Dimensions are in lbs/foot unless otherwise stated.

(information from SPRITE, MIDGET, 1958-71 AUTOBOOK, by Kenneth Ball, Autopress Ltd. 1971)

Cylinder head nuts (except Sprite IV and Midget III) 40
Sprite IV and Midget III (studs 22 or small indent) 50
Sprite IV and Midget III (plain studs) 42
Main bearing cap bolts 60
Big-end cap bolts (except Sprite IV and Midget III) 35
Sprite IV and Midget III 45
Crankshaft pulley nut 70
Gudgeon pin clamp screw 25
Flywheel bolts 35 to 40
Rocker pedestal nuts 25
Sump to crankcase bolts 6
Rocker cover bolts 4
Oil pump securing bolts (Sprite IV and Midget III) 12
Oil filter 10 to 15
Steering column pinch bolt (Sprite IV and MidgetIII) 10
Deep-pressed cylinder side cover (Sprites III and IV, Midgets II and III) 5
Steering wheel nut 41
Disc to hub 40 to 45
Caliper to hub 45 to 50
  Steering column – top fixing bolts 12 to 17
    pinion pinch bolt 9 to12
  Steering wheel nut 37
  Master cylinder port adaptors 33
  Plastic reservoir fixing bolts 5
  Pressure failure switch (nylon) 15 lb in
  Pressure failure switch assembly end plug 200 lb in
Front hub nuts 25 to 65

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