Moker LS Harmonic Balancer Installation Tool Kit for Chevy SBC & BBC — 5/8-16 & 7/16-16 Threads, Hardened Steel

The Moker 66515 LS harmonic balancer installation kit is a compact, steel toolset made to press-fit harmonic balancers onto Big Block and Small Block Chevy crankshafts quickly and reliably.

When assembling or servicing Chevy SBC (Small Block) and BBC (Big Block) engines, seating the harmonic balancer squarely without damaging the crank snout or the balancer is critical. The Moker 66515 LS kit provides the correct thread sizes and a thrust-bearing arrangement so you can draw the balancer onto the crank with controlled force, replacing improvised methods that risk misalignment or component damage.

How does this kit simplify harmonic balancer installation?

The kit turns a tricky press-fit operation into a simple threaded pull-in procedure. By threading the appropriate end into the crank and using the included nut and thrust bearing, you can evenly pull the balancer into place while monitoring alignment and preventing cocking.

• Removes need for improvised pullers or hammering that can damage parts.
• Uses a thrust bearing to reduce friction and allow smooth, even tightening.
• Includes a nut and washers to control travel and secure the balancer position.

Which crankshaft thread sizes are covered by the Moker 66515 LS kit?

The toolset is equipped with two common thread options so it fits a broad range of Chevy crank snouts. Choose the 5/8 in.-16 or the 7/16 in.-16 threaded end depending on the engine model and crank configuration for a direct, centered installation.

• 5/8 in.-16 thread for engines that use larger crank snout threads.
• 7/16 in.-16 thread for smaller or alternate crank applications.
• Threaded rod design allows quick swapping between sizes during a job.

What parts come in the kit and what materials are used?

The Moker 66515 LS arrives as a ready-to-use assembly with a threaded rod, nut, assorted washers, and a thrust bearing — everything needed to pull a balancer onto the crankshaft correctly. Components are manufactured from hardened steel to withstand repeated use in a shop environment.

• One threaded rod compatible with both thread sizes.
• One installation nut plus washers to set clearance and travel.
• One thrust bearing to reduce torque and protect threads and balancer faces.
• Durable steel construction and a 90-day limited factory warranty.

Will this tool damage my balancer or crank if I don’t have a hydraulic press?

No — when used correctly the kit minimizes risk versus hammering or improvised drivers. The threaded pulling method keeps axial alignment and the thrust bearing reduces binding, so the balancer is drawn on straight with controlled force.

• Avoids impact forces that can deform balancer bores or crank snouts.
• Allows gradual, visible progress so you can stop if resistance or misalignment occurs.
• Recommended: clean threads and lightly lubricate for smooth operation.

Who is this for: The Moker 66515 LS harmonic balancer installation kit is aimed at home mechanics, performance builders, and professional technicians working on Chevy Small Block and Big Block engines who need a compact, reliable way to seat harmonic balancers without a press. If you rebuild engines, swap cranks, or perform timing assembly work on SBC or BBC platforms, this kit provides the right thread sizes, a thrust bearing, and durable hardware to speed the job while protecting components.