Sunluway 77070 24mm Crank Bolt Impact Socket for GM LS Engines — 1/2" Drive, Deep Counter‑Weighted

The Sunluway 77070 24mm crank bolt socket is an impact-rated, deep counter-weighted tool engineered to remove GM LS harmonic balancer bolts quickly and reliably.

If you work on GM LS engines, stubborn 24 mm hex crank bolts are a common headache. The Sunluway 77070 is purpose-built to fit 24 mm pulley damper bolts and deliver higher momentum than ordinary sockets, so you can break and remove those crank bolts without holding the crankshaft or risking slippage. Constructed from heat-treated GB 40CR alloy steel and designed for use with a 1/2" drive impact wrench, this socket combines durability, fit accuracy, and impact resistance for workshop and DIY use.

How does this socket make removing an LS harmonic balancer easier?

The 77070 focuses on delivering torque to the crank bolt head while reducing the need to restrain the crankshaft. Its deep, counter-weighted body centers the force, and the 6-point contact profile grips the bolt to minimize rounding and slipping.

• Deep counter-weighted shape centers tool on bolt for stable removal.
• 6-point contact reduces bolt rounding and increases torque transfer.
• Designed for 1/2" drive impact wrenches; no crank holding required.

What makes the 77070 stronger than a standard impact socket?

Sunluway engineered this socket to provide roughly three times the momentum delivery of typical sockets, concentrating impact energy where it’s needed to loosen seized crank bolts. Heat-treated GB 40CR alloy steel adds toughness and fracture resistance during heavy use.

• 3× momentum power compared to standard sockets for better bolt breakage.
• Heat-treated GB 40CR alloy steel for improved hardness and longevity.
• Impact-rated construction to withstand repeated wrenching.

Will this fit my engine and how do I use it safely?

The socket fits GM LS engines and any application using a 24 mm hex crank bolt. Use with a compatible 1/2" drive impact wrench and follow normal safety practices: wear eye protection, secure the vehicle, and use the appropriate breaker bar or impact tool settings.

• Compatible with GM LS pulleys using 24 mm hex damper bolts.
• Works with standard 1/2" drive impact tools and breaker bars.
• Follow workshop safety: gloves, eye protection, and stable vehicle support.

How durable is this socket and what warranty does it include?

Manufactured from impact-quality GB 40CR alloy and heat treated for hardness, the 77070 resists wear and breakage under impact loads. Sunluway backs the product with a 30-day satisfaction guarantee and a 1-year warranty for added buyer protection.

• Heat-treated alloy steel construction improves lifespan under impact.
• Designed to avoid slippage and metal deformation during removal.
• 30-day full refund policy and 1-year limited warranty from Sunluway.

Who this is for: The Sunluway 77070 is aimed at professional mechanics, automotive technicians, and experienced DIYers who work on GM LS engines or any vehicle with a 24 mm crank pulley bolt. If you need a robust, impact-rated socket to remove stubborn harmonic balancer bolts without damaging the bolt head or the tool, this socket provides a focused, durable solution for shop or garage use.