Safety & Security

The Best Flywheel Locks

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Our picks are based on Amazon bestseller rankings, verified customer ratings, and product availability. We update our recommendations regularly to ensure accuracy.

Securing your vehicle's flywheel is crucial for preventing accidental starts and ensuring safety during maintenance. A reliable flywheel lock provides peace of mind and protects against potential hazards. Choosing the right lock depends on your specific needs and vehicle type.

No. 1
Hiltmoaut Flywheel Lock Tool Replacement for Porsche 924S 944 951 944S2 968
  • Precision Fit for Porsche Classics:Engineered to replace for OEM #00072192060, fits 924S, 944, 944 Turbo/951, 944S2 (1982-1991), and 968 Automatic Transmission.
  • Secure Flywheel Locking: Locks flywheel during clutch, timing, or transmission repairs to prevent rotation—critical for safe, accurate engine maintenance.
  • High-Strength Construction : premium steel material ensures durability for professional shop use or DIY classic car restoration.
  • What's In Package: Includes 1 flywheel lock tool—ready to use for immediate engine repair tasks.
  • No Compromises on Safety: Essential for avoiding tool slippage or engine damage; trusted by specialists and vintage car enthusiasts.
No. 2
Push Industries 104.101 Flywheel Lock for Yamaha 701 & 760 Watercraft Engines: Precision-Crafted...
  • Precision Craftsmanship: Meticulously engineered for Yamaha 701-760 motors, the Push Industries Billet Yamaha Flywheel Lock boasts premium construction using 6061 aluminum, providing durability and a perfect fit to OEM cases.
  • Enhanced Durability: The flywheel lock features a sleek black anodized coating, ensuring not only a sophisticated appearance but also resistance to wear and corrosion for long-lasting performance.
  • Secure Fastening: Utilizing zinc grade 5 bolts, this tool guarantees a secure and reliable hold during maintenance tasks, offering peace of mind when removing engine couplers and flywheel bolts.
  • Hardened Steel Gear Tooth: With a hardened steel gear tooth, the flywheel lock enhances overall strength, further safeguarding engine components and ensuring a resilient and effective tool for your servicing needs.
  • Effortless Maintenance: Engineered to prevent crankshaft movement, this flywheel lock simplifies the removal of various components, allowing for confident and damage-free installation of your flywheel bolt to precise torque specifications. Upgrade your...
No. 3
One Automotive Flywheel Lock Device Engine Flywheel Holder
  • Essential Tool for Engine Repair: This automotive flywheel lock device and engine flywheel holder secures the flywheel during engine timing and repair.
  • Robust Locking Mechanism: Ensures the flywheel remains stationary during repairs. Provides reliable stability as an engine flywheel locking and holding tool
  • Streamlines Engine Maintenance: Simplifies flywheel locking and holding, making engine timing adjustments quicker. Improves efficiency for mechanics and DIY enthusiasts
  • Versatile Engine Repair Tool: Compatible with various vehicle models. Works as a flywheel holding tool and engine flywheel tool for cars, trucks, and SUVs
  • Precision Engineering for Engine Timing: Manufactured to exacting standards for consistent performance. Ideal flywheel locking tool for accurate engine timing and repair
No. 4
Lisle 22110 Flywheel Lock
  • Locks flywheel in place when removing harmonic balancer on 6.6L Duramax Engines with Allison automatic transmissions
  • Saves time by locking the flywheel at the transmission instead of having to remove the starter for water pump replacement
  • On 2500 and 3500 pickups, remove metal spring-loaded inspection plate on the bottom of the transmission
  • For more information check the main Lisle tool- 22100
  • Replacement part for Lisle tool- 22100
SaleNo. 5
DASPARTS Universal Flywheel Lock Tool, Universal Flywheel Holder ‎For 6 or 12 Volt VW (180 & 200MM...
  • For VW Beetle Sedan 1954 - 1977 Ragtop 1954 - 1963 Sunroof 1964 - 1977 Convertible 1954 - 1970
  • For VW Super Beetle Sedan 1971 - 1975 Convertible 1971 - 1979
  • For VW Karmann Ghia Coupe 1956 - 1974 Convertible 1957 - 1974
SaleNo. 6
OTC 7221 Flywheel Holder - Locks Flywheel in Position for Servicing
  • Holds the flywheel in a locked position for servicing
  • Fits GM 6.6L Duramax Diesel, 2001 to present
  • Similar to J-44643
No. 7
CTA Tools 3887 Engine Lock Tool - Compatible with Porsche 928
  • Holds flywheel when reinstalling Automatic & Manual transmission
  • Services Porsche 928 (1983-1995)
  • On manual transmission, it is placed in the location of slave cylinder after removal
  • On automatic transmission, it is placed in the location of inspection plate after removal
  • Compare to Porsche Factory Tool 00072191611
No. 8
Push Industries 104.102 Flywheel Lock for Kawasaki 750 & 800 Watercraft Engines: Precision-Crafted...
  • NOTE: Does not work on 440/550 or 650 Models
  • Precision Craftsmanship: Meticulously engineered for Kawasaki 750 & 800 motors, the Push Industries Billet Kawasaki Flywheel Lock boasts premium construction using 6061 aluminum, providing durability and a perfect fit to OEM cases.
  • Enhanced Durability: The flywheel lock features a sleek black anodized coating, ensuring not only a sophisticated appearance but also resistance to wear and corrosion for long-lasting performance.
  • Secure Fastening: Utilizing zinc grade 5 bolts, this tool guarantees a secure and reliable hold during maintenance tasks, offering peace of mind when removing engine couplers and flywheel bolts.
  • Hardened Steel Gear Tooth: With a hardened steel gear tooth, the flywheel lock enhances overall strength, further safeguarding engine components and ensuring a resilient and effective tool for your servicing needs.
  • Effortless Maintenance: Engineered to prevent crankshaft movement, this flywheel lock simplifies the removal of various components, allowing for confident and damage-free installation of your flywheel bolt to precise torque specifications. Upgrade your...
No. 9
Flywheel Locking Tool
  • 6 Volt And 12 Volt Applications
No. 10
OEMTOOLS 25557 Flywheel Locking Tool, 3 Piece Flywheel Locking Tool Set, Flywheel Locks for Duramax Engines...
  • Peace of Mind: Keep your flywheel in place when removing a harmonic balancer with this flywheel lock, so you can focus on the task at hand worry-free
  • No Extra Steps: If you need to replace your water pump, lock your flywheel with this flywheel locking tool set instead of removing the starter to save time and simplify your work process
  • Everything You Need: The flywheel locks come with a 36MM 3/4" drive 12 point socket, making it simple to remove and reinstall the harmonic balancer bolt during your projects
  • Set It and Forget It: For Duramax 2500/3500 vehicles, the toothed attachment quickly locks the flywheel; Remove the inspection plate to align the lock with your flywheel
  • Tightly Fastened: For Duramax 4500/5500 vehicles, the toothed piece with its included fastener is easy to hand-tighten once the teeth are aligned with the flywheel

Last update on 2026-09-02 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best Flywheel Locks

Material and Durability

When selecting a flywheel lock, consider the materials used. High-quality steel or hardened alloys offer superior strength and resistance to tampering. Look for locks with a robust construction that can withstand impact and environmental factors. A durable lock ensures long-term security and reliability.

Frequently Asked Questions

What is a flywheel lock?
A flywheel lock is a safety device designed to prevent an engine from accidentally starting. It works by physically blocking the rotation of the flywheel, a critical component of the engine's rotational system.
Are flywheel locks universal?
No, flywheel locks are not universally compatible. They are often designed for specific engine types or flywheel sizes. It's essential to check the lock's specifications against your vehicle's engine to ensure a proper fit.
How do I install a flywheel lock?
Installation typically involves positioning the lock around the flywheel and engaging a locking mechanism. Always refer to the manufacturer's instructions for your specific model, as the process can vary. Ensure the lock is securely fastened before working on the engine.
Can a flywheel lock be bypassed?
While most flywheel locks are designed to be tamper-resistant, determined individuals might attempt to bypass them. However, a high-quality lock made from strong materials significantly increases the difficulty of unauthorized access or engine starting.