Safety & Security

The Best Flywheel Locks

This post contains affiliate links. As an Amazon Associate we earn from qualifying purchases.

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
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
No. 2
Hiltmoaut Flywheel Lock Tool 00072192060 for Porsche 944 924 S 944 Turbo 951 944S2 1982-1991
  • 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. 3
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. 4
LainKeen Auto Engine Flywheel Locking Tool Kit Compatible with BMW N20 M47TU M54 M57T2 M57TU N40 N42 N43 N45T...
  • 8809 Flywheel Locking Tool is used to lock the flywheel while the transmission is removed for service.
  • Applications: Compatible with BMW N20 M47TU M54 M57T2 M57TU N40 N42 N43 N45T N46 N46T N51 N52 N53 N54 N62 N73 S85 & W17 engines.
  • Comparable to BMW factory tool # 119260.
  • Ultra-precise design, made of high quality material, with high hardness, durability and anti-corrosion.
  • If you have any questions with the Flywheel Locking Tool, please feel free to contact us.
No. 5
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
No. 6
22100 Flywheel Locking Tool with 36mm 3/4’’ Socket for 6.6L Duramax Engines...
  • Duramax Flywheel Locking Tool for 6.6L Engines – Specially designed to lock the flywheel in place for 6.6L Duramax engines equipped with Allison automatic transmissions. Essential for tasks like harmonic balancer bolt removal or water pump replacement...
  • Dual Fitment Modes for Multiple Vehicle Classes – For Duramax 2500/3500 pickups, remove the spring-loaded metal inspection plate and insert the toothed piece into the flywheel teeth. For 4500/5500 trucks, use the toothed piece with screws after removing...
  • Complete OEM-Grade Maintenance Kit – Offers the strength and reliability of OEM tools, plus the convenience of a packaged solution that includes all required components and storage. A high-performance, high-value tool for anyone working on Duramax...
  • Multi-Use Compatibility – Designed for flywheel locking, harmonic balancer servicing, water pump replacement, and axle nut removal—combining multiple essential repair needs in a single, compact kit.
  • Includes 36mm 12-Point Socket with 3/4" Drive – Comes with a 36mm 12-point socket engineered to remove and re-torque the harmonic balancer bolt easily. Compatible with axle nuts, making it a versatile addition to your toolbox for other drivetrain or...
  • Durable & Portable Storage Case Included – Comes in a heavy-duty molded plastic box, protecting the tool from damage and making it easy to store or transport in mechanic tool carts or truck compartments.
  • Industrial-Grade CRV Steel, Heat-Treated & Lab-Tested – This tool is forged from premium chromium-vanadium steel (CRV) and heat-treated to withstand extreme torque pressure. Tested in factory settings for over 300+ flywheel engagements at 450 ft-lbs...
  • Built for Heavy-Duty Reuse – Engineered for durability and repeated professional usage. Whether you're a mechanic handling fleets or a DIYer servicing your own truck, this tool holds up over years of intense use.
  • No Starter Removal Required – Save Time on Maintenance – Avoid the frustrating step of starter motor removal during water pump service. This tool provides direct crankshaft access, cutting repair time nearly in half while improving safety and...
  • Warranty Included for Peace of Mind: All products come with a 12-month warranty against quality-related issues and a 30-day money-back guarantee, ensuring that you can buy with confidence. Our dedicated customer service team is ready to assist you.
No. 7
Yuesstloo Flywheel Locking Tool, Compatible with BMW N20 M47TU M54 M57T2 M57TU N40 N42 N43 N45T N46 N46T N...
  • Yuesstloo Flywheel Locking Tool is used to lock the flywheel while the transmission is removed for service.
  • Compatible with BMW N20 M47TU M54 M57T2 M57TU N40 N42 N43 N45T N46 N46T N51 N52 N53 N54 N62 N73 S85 & W17 engines.
  • Comparable to BMW factory tool # 119260.
  • Made of high quality material, with high hardness, strong and not easy to break.
  • If you are unhappy for any reason or there is some problem with our products, you can get help from us. Customer satisfaction is our top priority.
No. 8
One Automotive Flywheel Lock Device Engine Flywheel Holder and Securing Tool Locking Tool for Engine Timing...
  • 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. 9
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...

Last update on 2026-07-18 / 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.