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.
Warning!!!     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.
Centerbolt (Harmonic Damper)	Engine Oil	85 ft-lbs.
Bellhousing (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