Chevrolet Big Block Specifications

Firing Order

Torque Specs

These specs may not be correct for your application.

Verify your engine specs with a service manual for your year and model, and always torque bolts in three equal increments

Bolts or Parts Lube or Sealer Torque to:
Main Caps 396-427

(2 bolt)

Engine Oil 95 ft-lbs.
Main Caps 396-454

(4 bolt)

Inner and Outer bolts

Engine Oil 110 ft-lbs.

If you are using ARP bolts, you MUST use
their specs.  Click Here!

3/8 Connecting Rod Bolt Engine Oil 50 ft-lbs.
7/16 Connecting Rod Bolt Engine Oil 70 ft-lbs.
Cylinder Heads Engine oil (blind hole)

Sealer (water jacket)

75 ft-lbs. (long bolts)

65 ft-lbs. (short bolts)

Rocker Studs (screw-in) Engine Oil 50 ft-lbs.
Oil Pump Engine Oil 65 ft-lbs.
Oil Pan Engine Oil 12 ft-lbs.
Cam Sprocket

(upper gear)

Thread Locker 20 ft-lbs.
Timing Cover Engine Oil 6 ft-lbs.
Intake Manifold

(Cast Iron Heads)

Non- Hardening Sealer 25 ft-lbs.
Valve Cover Engine Oil 3 ft-lbs.
Exhaust Manifold Anti-Seize Lubricant 25 ft-lbs.
Spark Plugs No Lube or Sealer 20 ft-lbs.
Flexplate (Automatic)

Flywheel (Clutch)

Thread Locker 60 ft-lbs.
Clutch Pressure Plate Thread Locker 35 ft-lbs.

(Harmonic Damper)

Engine Oil 85 ft-lbs.

(Transmission to Block)

Engine Oil 25 ft-lbs.

Chevrolet Big Block Casting Numbers

  1. Chevrolet Big block block casting numbers
  2. Chevrolet Big block cylinder head casting numbers
  3. Chevrolet Big block intake manifold casting numbers
  4. Chevrolet Big block exhaust manifold casting numbers
  5. Chevrolet Big block crankshaft casting numbers
  6. Chevrolet Big block camshaft casting numbers

Chevrolet Big Block Engine Suffix Codes

  1. Chevrolet Big Block Engine Suffix Codes OFC-9XZ
  2. Chevrolet Big Block Engine Suffix Codes AAA-CTB
  3. Chevrolet Big Block Engine Suffix Codes CTH-IJ
  4. Chevrolet Big Block Engine Suffix Codes IK-MZ
  5. Chevrolet Big Block Engine Suffix Codes Q-YZ