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πŸ”§ Torque Specifications

Find the right torque values for 5,383 vehicle configurations.

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Automotive Torque Specification Guide

What are Torque Specifications?

Torque specifications (or "torque specs") represent the specific amount of rotational force required to tighten a fastener. Engineers calculate these values to stretch the bolt slightly, creating a clamping force that holds components together under stress, heat, and vibration.

Why is proper torque critical?

  • Prevent Leaks: Gaskets need even pressure to seal fluids (e.g., head gaskets, oil pans).
  • Avoid Warpage: Uneven tightening can warp brake rotors or cylinder heads.
  • Safety: Loose wheel lug nuts or suspension bolts can cause catastrophic accidents.

Common Torque Units

  • ft-lbs (Foot-Pounds): Standard unit for larger bolts (lug nuts, head bolts).
  • in-lbs (Inch-Pounds): For smaller fasteners (valve covers, oil pans). 12 in-lbs = 1 ft-lb.
  • Nm (Newton Meters): Metric standard used by most modern manufacturers.

⚠️ Important: What are TTY (Torque-to-Yield) Bolts?

Many modern engines (especially head bolts and connecting rod bolts) use Torque-to-Yield (TTY) fasteners. These are tightened to a specific torque and then rotated a further degree (e.g., "30 ft-lbs + 90 degrees"). This permanently stretches the bolt. TTY bolts cannot be reused and must be replaced every time they are removed.

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