Description
Product Overview
This Diesel Crankshaft Seal Installation Tool is purpose-built for 1989-2016 Dodge Ram Cummins 3.9L 4BT, 5.9L B Series/ISB, and 6.7L ISB/QSB diesel engines. Installing a crankshaft seal without the correct driver risks damaging the seal lip — causing immediate oil leaks that require a full re-do of the job. This precision-machined installer drives the seal square and flush to the correct depth every time.
Key Features
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Precision Machined: CNC-machined to OE dimensions for 1989-2016 Cummins crankshaft seals — drives the seal in perfectly square with zero cocking.
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Multi-Engine Compatibility: Covers the entire B-series family — 3.9L 4BT, 5.9L 12V/24V, 6.7L ISB, and QSB marine/industrial variants in one tool.
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Prevents Seal Damage: Eliminates the #1 cause of premature seal failure — dented or distorted seal lips from improper installation methods.
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Heavy-Duty Steel Construction: Machined from high-carbon steel with black oxide finish for corrosion resistance and long service life.
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Replaces OEM Tools: Compatible with OE reference numbers 3824498 and 1338 at a fraction of dealer special tool cost.
Compatibility
| Engine |
Years |
Applications |
| 3.9L 4BT Cummins |
1989-2016 |
Step vans, industrial, marine generators |
| 5.9L B/ISB Cummins |
1989-2007 |
Dodge Ram 2500/3500 (12V & 24V) |
| 6.7L ISB Cummins |
2007-2016 |
Ram 2500/3500/4500/5500 |
| 5.9L/6.7L QSB Marine |
2003-2016 |
Marine propulsion and auxiliary engines |
Specifications
| Specification |
Details |
| OE Reference |
3824498, 1338 |
| Material |
High-Carbon Steel, Black Oxide Finish |
| Seal Type |
Front & Rear Crankshaft Seal |
| Engine Family |
Cummins B-Series (3.9L / 5.9L / 6.7L) |
Why Choose iFJF
Crankshaft seal leaks on a Cummins are messy, expensive, and time-consuming to fix twice. Our installer is a one-time investment that pays for itself after a single use — no more seal damage from hammer-and-socket methods. Trusted by diesel mechanics and DIY Cummins owners across North America. Backed by our 90-day satisfaction guarantee.
Frequently Asked Questions
Q: Will this work on my 12-valve 5.9L Cummins?
A: Yes. This tool fits all B-series Cummins engines from 1989-2016, including 12-valve and 24-valve 5.9L, 6.7L ISB, and 3.9L 4BT variants. Both front and rear crankshaft seals are supported.
Q: Do I really need this tool, or can I tap the seal in with a socket?
A: While some DIYers improvise with a socket or PVC pipe, the risk of cocking or cutting the seal lip is high. A properly seated seal using a dedicated driver eliminates the most common cause of repeat seal failure — improper installation.
Q: What's the difference between OE 3824498 and this tool?
A: Functionally identical — this tool performs the same seal-driving task as the factory service tool. It is manufactured to the same critical dimensions at a fraction of the dealer special tool cost.
Q: Does this work on marine QSB engines?
A: Yes. The QSB 5.9L and 6.7L marine engines share the same crankshaft seal dimensions as their automotive counterparts, so this tool works on both platforms.
Q: What seal should I pair with this tool?
A: Use any quality aftermarket or OEM front/rear crankshaft seal for Cummins 3.9L/5.9L/6.7L. We recommend a Viton seal for maximum temperature and chemical resistance in high-mileage applications.
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