Mopar Bolt Torque Specifications – Big Block

Mopar Big Block Bolt Torque Specifications

Mopar B/RB engines – 350/361/383/400/413/426W/440

Always torque bolts in three equal increments

Bolts or Parts Lube or Sealer Torque to:
Main Caps Engine Oil 85 ft-lbs.
Connecting Rod Bolts (Plain) Engine Oil 45 ft-lbs.
Connecting Rod Bolts (Heavy Duty) Engine Oil 55 ft-lbs.
Crankshaft Rear Bearing Seal Engine Oil 30 ft-lbs.
Cylinder Heads

Iron Heads

Engine oil

(blind hole)


(water jacket)


70 ft-lbs.

Rocker Shaft brackets Engine Oil 25 ft-lbs.
Oil Pump Cover Engine Oil 10 ft-lbs.
Oil Pump Engine Oil 35 ft-lbs.
Oil Pan Engine Oil 15 ft-lbs.
Camshaft Locking Bolt Thread Locker 35 ft-lbs.
Timing Cover Engine Oil 10 ft-lbs.
Intake Manifold

(Cast Iron Heads)

Non- Hardening Sealer 40 ft-lbs.
Valve Cover Engine Oil 6 ft-lbs.
Water Pump Non- Hardening Sealer 30 ft-lbs.
Fuel Pump Engine Oil 30 ft-lbs.
Starter mounting Bolts Engine Oil 50 ft-lbs.
Exhaust Manifold Anti-Seize Lubricant 30 ft-lbs.
Spark Plugs No Lube or Sealer 20 ft-lbs.
Flexplate/Flywheel Cap Screws Thread Locker 55 ft-lbs.
Flexplate to Torque Converter Thread Locker 270 in-lbs.

(Harmonic Damper)

Engine Oil 135 ft-lbs.

(Transmission to Block)

Engine Oil 50 ft-lbs.
Snap-on Torque Wrench
Snap-on Torque Wrench