Understanding ARP 2000 Rod Bolts

ARP 2000 rod bolts are high-performance fasteners designed for use in connecting rods. These bolts are made from a proprietary alloy that offers superior strength and durability compared to standard bolts. Proper torquing of these bolts is crucial for engine reliability and performance.

Torque Specifications

The recommended torque specifications for ARP 2000 rod bolts can vary depending on the specific application and bolt size. However, general guidelines are as follows:

  • For 3/8" ARP 2000 rod bolts: 50-55 ft-lbs
  • For 7/16" ARP 2000 rod bolts: 75-80 ft-lbs

It's important to note that these values are for use with ARP Ultra-Torque fastener assembly lubricant. Using different lubricants may require adjusting the torque values.

Stretch Method

Many engine builders prefer using the stretch method for more precise installation. The recommended stretch for ARP 2000 rod bolts is typically between 0.0055" to 0.0060". This method ensures consistent clamping force across all bolts, regardless of friction variations.

Installation Procedure

1. Clean and inspect all bolt threads and rod surfaces

2. Apply ARP Ultra-Torque lubricant to threads and under-head area

3. Install bolts and tighten to 20 ft-lbs

4. Final tightening:

- If using torque method: Tighten to final spec in one smooth motion

- If using stretch method: Measure initial length, then tighten until achieving proper stretch

Important Considerations

  • Always consult the specific instructions provided with your ARP 2000 rod bolts
  • Use a high-quality torque wrench or stretch gauge for accurate measurements
  • Never reuse rod bolts - always replace with new ones during engine rebuilds
  • Consider the connecting rod manufacturer's recommendations, as they may differ slightly from ARP's general guidelines

By following these specifications and procedures, you'll ensure optimal performance and longevity from your ARP 2000 rod bolts and engine assembly.

FAQs About ARP 2000 Rod Bolt Torque Specs

    • Can I use motor oil instead of ARP Ultra-Torque lubricant?
      While possible, it's not recommended. ARP Ultra-Torque provides more consistent results and allows for proper torque values.
    • How often should I replace ARP 2000 rod bolts?
      ARP recommends replacing rod bolts during each engine rebuild or after significant high-stress use.
    • Is it necessary to use a stretch gauge?
      While not absolutely necessary, a stretch gauge provides the most accurate method for achieving proper bolt tension.