Recommended Bolt Torque - Engine

CAST IRON ENGINES

Where Bolts Torque Lubricant
Main Cap 7/16" bolts 65 ft/lbs - Outer Oil or Molylube
  7/16" bolts 70 ft/lbs - Inner Oil or Molylube
  3/8" bolts 40 ft/lbs - Outer Oil or Molylube
  7/16" studs 65 ft/lbs - Inner Oil or Molylube
  7/16" studs 60 ft/lbs - Inner Oil or Molylube
  3/8" studs 60 ft/lbs - Outer Oil or Molylube

Connecting Rod 11/32" 40-45 ft/lbs Oil or Molylube
  3/8" 40-45 ft/lbs - .006" stretch Oil or Molylube
(PN-14011092) 7/16" 70 ft/lbs - .005" - .006" stretch Oil or Molylube

Cylinder Head   65 ft/lbs Sealant
Blind bolt holes in Bowtie blocks require oil on head bolt threads
Rocker Arm Screw-In Stud   50 ft/lbs Sealant
Camshaft Sprocket   20 ft/lbs Oil
Intake Manifold   30 ft/lbs Oil
Flywheel / Flexplate   60 ft/lbs Oil
Front Damper Bolts   60 ft/lbs Oil
Exhaust Manifold   25 ft/lbs Antiseize
ALUMINUM ENGINES
Where Bolts Torque Lubricant
Main Cap 3/8" bolts 40 ft/lbs - Outer Oil or Molylube
7/16" studs 65 ft/lbs - Inner Oil or Molylube
7/16" studs 60 ft/lbs - Outer Oil or Molylube
3/8" studs 60 ft/lbs - Outer Oil or Molylube

Connecting Rods 11/32" 40-45 ft/lbs Oil or Molylube
3/8" 45-50 ft/lbs - .006 stetch Oil or Molylube
(PN-14011092 7/16" 70 ft/lbs - .005" - .006" stretch Oil or Molylube

Cylinder Heads   Long: 65 ft/lbs - Short: 60 ft/lbs Oil or Sealant
Blind bolt holes in Bowtie blocks require oil on head bolt threads
Rocker Arm Screw-In Stud   50 ft/lbs Sealant
Camshaft Sprocket   20 ft/lbs Oil
Intake Manifold   30 ft/lbs Oil
Intake Manifold with Aluminum Heads   25 ft/lbs Antiseize
Flywheel / Flexplate   60 ft/lbs Oil
Front Damper Bolt   60 ft/lbs Oil
Exhaust Manifold   25 ft/lbs Antiseize
When using aluminum heads make sure you use a hardened steel flat washer under the head bolts or stud nuts.
Use a steel shim or spring cup under valve springs used with aluminum heads. Shen using main cap studs,
place a hardened steel washer under the stud n ut.

Tommy Ledberg