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6.2L LS3 V8 · Fasteners

LS3 Torque Specs & Tightening Sequences

Every fastener on the LS3 with its complete tightening procedure: each pass in order, torque in lb-ft and N·m, turn-of-the-nut angles, and a flag on the bolts that stretch and must be replaced. Search by name or filter by the part of the engine.

70 entries

Fastener Thread Qty Tightening sequence
Cylinder head bolts, M11 Cylinder Head TTY Sequenced M11 20
  1. Torque 22 lb-ft · 30 N·m
  2. Angle 90°
  3. Angle 70°
Cylinder head bolts, M8 (perimeter) Cylinder Head Sequenced M8 10
  1. Torque 22 lb-ft · 30 N·m
Crankshaft main bearing cap bolt, inner (M10) Engine Block TTY Sequenced M10 10
  1. Torque 15 lb-ft · 20 N·m
  2. Angle 80°
Crankshaft main bearing cap stud, outer (M10) Engine Block TTY Sequenced M10 10
  1. Torque 15 lb-ft · 20 N·m
  2. Angle 51°
Connecting rod bolt Connecting Rod TTY M9 16
  1. Torque 15 lb-ft · 20 N·m
  2. Angle 85°
Crankshaft balancer (harmonic damper) bolt Crankshaft TTY M16 1
  1. Torque 111 lb-ft · 150 N·m
  2. Loosen Loosen 360°
  3. Torque 59 lb-ft · 80 N·m
  4. Angle 125°
Flywheel / flexplate bolt Crankshaft Sequenced M11 6
  1. Torque 15 lb-ft · 20 N·m
  2. Torque 37 lb-ft · 50 N·m
  3. Torque 74 lb-ft · 100 N·m
A/C compressor mounting bolt Accessory Drive M10 4
  1. Torque 37 lb-ft · 50 N·m
Accessory drive belt tensioner bolt Accessory Drive M10 1
  1. Torque 37 lb-ft · 50 N·m
Alternator bracket bolt Accessory Drive M10 1
  1. Torque 37 lb-ft · 50 N·m
Battery negative cable ground bolt Battery Negative Cable M8x1.25 1
  1. Torque 30 lb-ft · 40 N·m
Camshaft position (CMP) sensor bolt Engine Block — 1
  1. Torque 89 lb-in · 10 N·m
Camshaft retainer bolt, hex head Engine Block — 4
  1. Torque 18 lb-ft · 25 N·m
Camshaft retainer bolt, Torx head Engine Block — 4
  1. Torque 11 lb-ft · 15 N·m
Camshaft sprocket bolt, 3-bolt design Cam Gear — 3
  1. Torque 22 lb-ft · 30 N·m
Camshaft sprocket bolt, single-bolt design Cam Gear TTY M10 1
  1. Torque 55 lb-ft · 75 N·m
  2. Angle 50°
Clutch pressure plate bolt Flywheel — 6
  1. Torque 52 lb-ft · 70 N·m
CMP sensor wire harness bolt Engine Block — 1
  1. Torque 106 lb-in · 12 N·m
Coolant air bleed pipe and cover bolt Cooling M6 2
  1. Torque 106 lb-in · 12 N·m
Coolant temperature sensor Cylinder Head — 1
  1. Torque 15 lb-ft · 20 N·m
Crankshaft main bearing cap M8 bolt (in sequence) Engine Block Sequenced M8 —
  1. Torque 15 lb-ft · 20 N·m
  2. Torque 22 lb-ft · 30 N·m
Crankshaft main bearing cap side bolt (M8) Engine Block M8 10
  1. Torque 18 lb-ft · 25 N·m
Crankshaft oil deflector nut Engine Block — —
  1. Torque 18 lb-ft · 25 N·m
Crankshaft position (CKP) sensor bolt Engine Block — 1
  1. Torque 18 lb-ft · 25 N·m
Crankshaft rear oil seal housing bolt Rear Main Seal Housing — —
  1. Torque 18 lb-ft · 25 N·m
Cylinder head coolant plug Cylinder Head M12 2
  1. Torque 15 lb-ft · 20 N·m
Engine block coolant drain plug Engine Block — 2
  1. Torque 44 lb-ft · 60 N·m
Engine block oil gallery plug Engine Block — —
  1. Torque 44 lb-ft · 60 N·m
Engine mount bracket bolt Engine Mount — —
  1. Torque 37 lb-ft · 50 N·m
Engine mount to front suspension cross member nut Engine Mount — 2
  1. Torque 43 lb-ft · 58 N·m
Engine mount to mount-bracket nut Engine Mount — 2
  1. Torque 74 lb-ft · 100 N·m
Engine oil tank bolt (Z52 dry sump) Oil Tank — —
  1. Torque 18 lb-ft · 25 N·m
EVAP canister purge solenoid valve bolt Intake — 1
  1. Torque 37 lb-ft · 50 N·m
Exhaust manifold bolt Header M8 —
  1. Torque 11 lb-ft · 15 N·m
  2. Torque 15 lb-ft · 20 N·m
Exhaust manifold heat shield bolt Exhaust — —
  1. Torque 106 lb-in · 12 N·m
Exhaust manifold stud Cylinder Head — —
  1. Torque 15 lb-ft · 20 N·m
Flexplate-to-torque-converter bolt Flywheel — —
  1. Torque 47 lb-ft · 63 N·m
Fuel rail bolt Fuel Rail M6 4
  1. Torque 89 lb-in · 10 N·m
Ignition coil bracket bolt Valve Cover M6 8
  1. Torque 106 lb-in · 12 N·m
Ignition coil to bracket bolt Ignition Coil M6 8
  1. Torque 89 lb-in · 10 N·m
Intake air temperature sensor Intake Manifold — 1 Not separately specified
Intake manifold bolt Intake Manifold Sequenced M6 10
  1. Torque 44 lb-in · 5 N·m
  2. Torque 89 lb-in · 10 N·m
Knock sensor Engine Block — 2
  1. Torque 18 lb-ft · 25 N·m
Lifter guide bolt Lifter Guide M6 4
  1. Torque 106 lb-in · 12 N·m
Oil filter adapter bolt Engine Block — —
  1. Torque 40 lb-ft · 55 N·m
Oil filter fitting (filter adapter to block) Engine Block — 1
  1. Torque 40 lb-ft · 55 N·m
Oil level indicator (dipstick) tube bolt Engine Block — 1
  1. Torque 18 lb-ft · 25 N·m
Oil level sensor Oil Pan — 1
  1. Torque 115 lb-in · 13 N·m
Oil pan bolt, M8 (perimeter) Oil Pan M8 —
  1. Torque 18 lb-ft · 25 N·m
Oil pan closeout cover bolt — left side Oil Pan — —
  1. Torque 80 lb-in · 9 N·m
Oil pan closeout cover bolt — right side Oil Pan — —
  1. Torque 80 lb-in · 9 N·m
Oil pan cover bolt Oil Pan — —
  1. Torque 106 lb-in · 12 N·m
Oil pan drain plug Oil Pan M12 1
  1. Torque 18 lb-ft · 25 N·m
Oil pan rear bolt, M6 Oil Pan M6 2
  1. Torque 106 lb-in · 12 N·m
Oil pickup tube bolt Oil Pickup Tube — —
  1. Torque 106 lb-in · 12 N·m
Oil pressure sensor / switch Engine Block — 1
  1. Torque 26 lb-ft · 35 N·m
Oil pump mounting bolt Oil Pump — —
  1. Torque 18 lb-ft · 25 N·m
Oxygen sensor Exhaust — 4
  1. Torque 30 lb-ft · 41 N·m
Power steering pump bolt Accessory Drive M8 2
  1. Torque 18 lb-ft · 25 N·m
Rocker arm bolt Rocker Arm M8 16
  1. Torque 22 lb-ft · 30 N·m
Spark plug Cylinder Head — 8
  1. Torque 11 lb-ft · 15 N·m
Starter motor mounting bolt Starter M10 2
  1. Torque 37 lb-ft · 50 N·m
Thermostat housing bolt Thermostat Housing — —
  1. Torque 11 lb-ft · 15 N·m
Throttle body bolt Throttle Body M6 4
  1. Torque 89 lb-in · 10 N·m
Timing chain tensioner bolt Timing Chain Tensioner — 2
  1. Torque 22 lb-ft · 30 N·m
Timing cover bolt Timing Cover M8 —
  1. Torque 18 lb-ft · 25 N·m
Valley cover plate bolt Valley Plate M6 —
  1. Torque 18 lb-ft · 25 N·m
Valve cover bolt Valve Cover M6 8
  1. Torque 106 lb-in · 12 N·m
Water pump bolt Water Pump M8 6
  1. Torque 11 lb-ft · 15 N·m
  2. Torque 22 lb-ft · 30 N·m
Water pump pulley bolt Water Pump — 4 Not separately specified