Frequently Asked Questions (FAQ)

What do I torque my rod bolts to?

    1. Correct Clearances
      a. Approximate bearing clearance is 0.001″ per inch of rod journal diameter unless otherwise specified by original equipment manufacturer.
    2. Lubricants and Torquing
      a. For all rod bolts, both under head and threads should be lubricated with included ARP Ultra-Torque assembly lube.
      b. The preferred torquing method is to measure rod bolt stretch, as shown on Table A below. Measure the rod bolt length loose, then progressively tighten to the appropriate stretch recommended, not to exceed the torque figures below.

      Type of Bolt Recommended Stretch Torque Not to Exceed
      3/8 ARP L19 0.0065-0.0070″ 65 FOOT POUNDS
      7/16 ARP 2000 0.0055-0.0060″ 75 FOOT POUNDS
      7/16 CUSTOM AGE 0.006-0.0065″ 88 FOOT POUNDS
      1/2 ARP L19 0.0083-0.0087″ 130 FOOT POUNDS
    3. Additional Notes
      a. Pin fit may be required. <0.750″ diameter require 0.0010″-0.0016″; 0.751″-1.100″ require 0.0012″-0.0020″ clearance. Larger pins require more clearance.
      b. Rotating assembly should be blueprinted to ensure there are no interference issues.
      c. Use engraving or etching tool for numbering rods and caps, not stamps.
      d. If any rod bolts permanently stretch after installation or engine has been over-revved, bolts should be replaced.

How to adjust valves

  • Rotate the engine and adjust one cylinder at a time
  • When the exhaust valves just begin to open, adjust the intake
  • When the intake valves are just past maximum lift, adjust the exhaust
  • Intake valve lash .012
  • Exhaust valve lash .012