Bonbo Crankshaft Wear Sleeve & Seal Install Tool Set for Dodge Cummins 3.9L–6.7L — Hardened Steel, Black Oxide

Bonbo's 5046 crankshaft wear sleeve tool and 1338 front cover crankshaft seal installer are a matched pair engineered to position seals and sleeves perfectly on Dodge Cummins 3.9L, 5.9L and 6.7L diesel engines.

If you service Dodge Cummins engines from late-1980s 4BTs through modern ISB/6.7L and Paccar PX-6 platforms, these purpose-built tools eliminate guesswork when seating OEM seals and wear sleeves. The two-piece set replaces factory service tools, aligns parts concentrically, and reduces the chance of damage during installation by delivering even pressure and a controlled fit. Constructed from hardened steel with a black oxide finish, they’re made to withstand repeated shop use while resisting corrosion.

How do these tools ensure a correct seal or sleeve fit?

The 1338 and 5046 are shaped to match factory seal and wear sleeve dimensions so each component is driven straight and square into its bore. That precise fit prevents cocking or misalignment that leads to leaks or premature wear.

• Matches OEM seating diameters for part numbers #3937111, #3904353 and kits like #3802820.
• Centers the seal and sleeve to avoid uneven compression.
• Distributes installation force to prevent torn lips or deformed sleeves.

Which Dodge Cummins engines and service parts are supported?

This set was designed for a wide range of Cummins B-series and ISB models plus QSB and Paccar applications. It fits common factory seals and directly replaces specific manufacturer tool numbers, streamlining routine front cover and crankshaft work.

• Compatible with Dodge Cummins 4BT 3.9L, B-series 5.9L, ISB 5.9L/6.7L and QSB 5.9L/6.7L engines.
• Works with factory seal numbers #3937111 and #3904353 and kit #3802820 components.
• Replaces OEM tool numbers 3824498 (1338) and 3824500 (5046).

What materials and durability can I expect from the Bonbo set?

Bonbo manufactures both pieces from high-strength steel and applies a black oxide coating to fight corrosion. The robust construction lets shops reuse the tools for many jobs without bending or premature wear, making them a cost-effective addition to the toolbox.

• High-strength steel core for structural rigidity.
• Black oxide finish improves rust resistance and reduces galling.
• Precision-machined surfaces for repeatable installations.

How does this tool set affect workshop efficiency and repair quality?

Using purpose-built installers speeds installations and reduces rework by ensuring components seat correctly the first time. That lowers downtime and the likelihood of post-repair leaks or warranty callbacks.

• Shortens seal and sleeve installation time with accurate alignment.
• Minimizes damage risk to expensive front covers and crank components.
• Simplifies training for technicians by providing a repeatable procedure.

Who is this for: Professional diesel mechanics, fleet maintenance shops, and experienced DIYers who work on Dodge Cummins 3.9L, 5.9L and 6.7L engines and need a reliable method to install front crankshaft seals and wear sleeves. If you routinely replace factory seal numbers listed above or perform front cover service on B-series, ISB, QSB or Paccar engines, this Bonbo tool set speeds the job and protects parts during installation. Bonbo backs the set with a satisfaction policy, allowing returns within the stated window if it doesn’t meet your needs.