GearWrench Fan Clutch Service Set 41580D — 5 Fan Nut Wrenches, Patented 35W Pulley Holder (Black Oxide)

GearWrench Fan Clutch Service Set 41580D is a complete kit of fan nut wrenches, pulley holder, and pins designed to remove and install fan clutches and drive pulleys across most passenger and light‑duty vehicles.

The 41580D combines a patented universal 35W pulley holder with a selection of metric fan nut wrenches, cam pins and press‑on pulley pins, all stored in a blow‑molded case. Built for professional and DIY mechanics, the set addresses the variety of fastener sizes and pulley styles encountered when servicing water pumps, timing components, and fan clutches. Components are finished with a black oxide coating for corrosion resistance and the kit is backed by GearWrench lifetime coverage.

Which components come in the GearWrench fan clutch kit?

This kit includes the tools you need to secure pulleys and remove fan nuts without improvising. The assortment covers common automotive fan nut diameters and offers pins for press‑on pulley housings found on some Chrysler engines.

• Patented 35W universal pulley holder to lock pulleys in place
• Five fan nut wrenches: 22 mm, 36 mm, 40 mm, 47 mm, and 50 mm
• Small pin set: five 5 x 8 mm pins for press‑on pulleys
• Large pin set: cam pins sized 6 x 10 mm and 7.5 x 18 mm
• Durable blow‑molded storage case for organization and protection

How does the universal pulley holder help during service?

The patented 35W pulley holder secures the pulley or fan clutch housing so you can apply torque to the fan nut without spinning the assembly. That stability reduces slippage and damage to delicate fins or housings while speeding removal and installation.

• Engages multiple pulley profiles for broad vehicle coverage
• Provides a firm hold to avoid marring or bending pulley components
• Compatible with both bolted and press‑on pulley types with included pins

What sizes and fitments will this set handle?

The wrench sizes cover the most commonly used fan and water pump nut diameters found on many domestic and import vehicles. The included pin sets allow the pulley holder to adapt to press‑on housings and cam‑style arrangements without extra parts.

• Fan nut wrenches: 22 mm (7/8"), 36 mm (1‑7/16"), 40 mm (1‑9/16"), 47 mm (1‑7/8"), 50 mm (2")
• Pin options for press‑on Chrysler‑type pulleys: 5×8 mm, 6×10 mm, 7.5×18 mm
• Works for most passenger cars and light trucks with standard pulley fasteners

Why choose this GearWrench kit over single wrenches or improvised tools?

Buying the complete set eliminates guesswork and the need to source separate pins or specialty holders, saving time on the job and protecting fasteners and components from damage. GearWrench designs the tools for repeatable use, and the blow‑molded case keeps everything arranged for fast retrieval.

• One purchase supplies multiple nut sizes and pin configurations
• Black oxide finish resists corrosion for long tool life
• Lifetime warranty provides ongoing reliability for professional shops

Who this set is for: The GearWrench Fan Clutch Service Set 41580D is aimed at professional technicians, independent repair shops, and serious DIYers who service cooling systems, water pumps, timing components, or engine fans. If you need a compact, organized solution that covers common fan nut sizes and both bolted and press‑on pulleys, this kit supplies the parts and holder required for consistent, damage‑free work.