Carrillo BLT-GAUGE Rod Bolt Stretch Gauge

Vehicle Fitment

• Universal tool - works with most aftermarket and OEM connecting-rod bolts
• Ideal for performance engine builds (street, race, turbo, high-RPM)

Features

• Measures bolt stretch (elongation) to ensure accurate preload, not just torque
• Dial indicator accurate to 0.001" for precise measurements
• Adjustable to fit bolts up to ~2.75" in length
• Built-in high-tension spring ensures reliable pull during measurement
• Lightweight and handheld for use on workbench or in assembled engine

Specifications

• Part Number: BLT-GAUGE
• Accuracy: 0.001" (dial readout)
• Maximum Bolt Length Supported: ~2.75"
• Indicator Dial: Analog with precision readout
• Spring: High-tension for accurate stretch measurement

Included Components

• 1 x Bolt Stretch Gauge with Dial Indicator
• Mounting / Contact Hardware (adapters if needed)

Product Description

The Carrillo BLT-GAUGE is a precision tool designed to measure the actual stretch of rod bolts during engine assembly. Unlike torque-only methods, this tool lets builders monitor bolt elongation - a more reliable indicator of preload - ensuring reliably consistent clamping force.

With a dial readable to 0.001 inches and an adjustable design, it accommodates a wide range of bolt lengths (up to ~2.75"). The built-in spring applies consistent tension so you can measure how much a fastener stretches under real conditions, helping to avoid under- or over-clamping.

This gauge is vital for high-performance builds using Carrillo rods or other aftermarket connecting rods. It helps engine builders verify proper bolt preload, reduce the risk of bolt failure, and ensure long-term reliability under high-stress conditions.