GEAROLL Cam Timing Tool Kit for Cummins ISX/QSX/X15 — 4/5/6/7° Wedges & 7mm Jake‑Brake Feeler

GEAROLL's Cam Timing Tool Kit is a complete set of hardened steel tools to set gear-train timing and adjust Jake-style engine brakes on 2007–2017 Cummins ISX, QSX and X15 engines. This compact kit groups the crank pin, cam gear puller, a 7mm engine-brake feeler tool, a selection of 4–7° wedge spacers, fasteners, washers, gloves and a carrying case so technicians can lock, pull and fine-tune cam timing quickly and reliably in the shop or roadside. Every component is machined for repeatable alignment and corrosion resistance so you get consistent results when working on single- or double-cam Cummins heads.

How does the kit help set gear-train timing precisely?

The kit includes a crank pin and cam gear puller sized to seat into Cummins timing gear bores and hold components while you line up timing marks or replace gears. Using the correct pin and puller prevents slippage and uneven loading during extraction or installation.

• Crank pin designed to fit Cummins timing housings for firm, indexed placement.
• Cam gear puller applies even axial force to remove gears without gear face damage.
• Durable steel construction resists bending under torque for consistent alignment.

What does the engine brake adjustment tool do and when should it be used?

The 7mm Jake-brake feeler tool lets you set the exhaust valve adjusting screw position relative to the slave piston contact pad for correct engine-brake timing. It’s used during brake adjustment, timing retimes, or when rebuilding the head to ensure braking events occur at the intended crank angle.

• 7mm feeler engages between piston pad and valve adjuster for accurate clearance checks.
• Use it cylinder-by-cylinder while rotating the engine to verify brake timing.
• Includes gloves and case to keep the tool clean and accessible during service calls.

Which wedge sizes are included and why do they matter?

The kit supplies five wedge spacers in 4°, 5°, 6° (two pieces) and 7° options to match different cam timing requirements and to recreate OEM specified degrees of advance or retard. Choosing the correct wedge allows technicians to index the cam gear precisely to the engine’s intended timing specification.

• Five wedges cover common adjustment ranges used on ISX/QSX/X15 engines.
• Multiple 6° wedges provide redundancy when repeat adjustments are needed.
• Wedges are machined for consistent angle and repeatable fits between gear faces.

What hardware and extras come with the kit to support workshop use?

Besides the primary tools, the set includes four screws, four washers, a portable storage case and a pair of protective gloves so you can organize parts, reduce contamination and protect hands during assembly. The included fasteners match the tool interfaces to eliminate searching for compatible hardware.

• Matched screws and washers for secure tool assembly and safe operation.
• Sturdy carrying case for transport and on-truck storage without losing small parts.
• Gloves help keep tools and engine surfaces free from oil and grime during work.

Who is this for This kit is built for diesel technicians, fleet mechanics and experienced DIYers who service 2007–2017 Cummins ISX, QSX and X15 engines and need reliable, OEM-replacement style tools for cam timing and Jake-brake adjustments. If you perform timing gear swaps, head work, brake calibration or roadside repairs, the GEAROLL kit provides the common gauge, puller and wedge options needed to complete the job cleanly and consistently without improvising parts.

FAQ

Q: Is this kit compatible with my Cummins X15 engine?

A: Yes. The GEAROLL kit fits Cummins ISX, QSX and X15 engines from 2007 to 2017 for timing and engine-brake adjustments.

Q: Are replacement wedges or parts sold separately?

A: Replacement wedges or individual components may be available—contact GEAROLL customer support for parts and ordering options.