Best 6.7L Rear Main Seal Installers and Tools for Ford Power Stroke
The 6.7L Power Stroke engine demands precision when installing or removing rear main seals. This guide highlights five top tools and kits designed to simplify the process, reduce the risk of leaks, and extend engine life. Each option covers the core task of installing rear crankshaft seals with correct depth and minimal seal damage, while offering compatibility with Ford F-Series Super Duty models from 2011 to 2021 and additional heavy-duty trucks that use the 6.7L Power Stroke engine. The selections below are based on tool design, material quality, and installation accuracy to support professional and do-it-yourself mechanics alike.
| Product | Brand | Compatibility | Notes |
|---|---|---|---|
| DNJ RM4260 Rear Main Seal | DNJ | Ford F-250/350/450/550 2011-2016 6.7L | Brand-new seal with 1-year/12,000-mile warranty |
| Front+Rear Crankshaft Seal Remover & Installer Tool Set | E-cowlboy | Ford 6.7L Powerstroke (2011-2022) | Comprehensive kit; front adapter note for 2011-2019 models |
| Rear Main Crankshaft Seal & Wear Sleeve Installer Alt ST-224C | Danti | Cummins 3.9L-9.0L and ISB/ISL engines; also listed for 6.7L | Heavy-duty carbon steel construction |
| maXpeedingrods 303-1514 Rear Crankshaft Seal Installer | maXpeedingrods | Ford 6.7L Power Stroke (2011-2021) and 2016-2021 6.7L Super Duty | Alternate ST-138; ensures correct installation depth |
| 6.7L Power stroke Rear Crankshaft Seal Installer Tool 303-1514 Alt ST-138 | Bonbo | Ford Super Duty 2011-2021 6.7L; 2016-2021 6.7L F-650/750 | Compact set emphasizing safe seal installation |
DNJ RM4260 Rear Main Seal For 6.7L Ford

The DNJ RM4260 rear main seal kit is designed for Ford 11-16 F-250, F-350, F-450, and F-550 Super Duty trucks equipped with the 6.7L V8 engine. The kit focuses on a direct seal replacement with a limited warranty of one year or 12,000 miles. Built to meet OEM-style tolerances, this option aims to minimize oil leaks after installation while offering a straightforward installation process for compatible models.
Front+Rear Crankshaft Seal Remover & Installer Tool Set

This comprehensive tool set from E-cowlboy is designed to support both front and rear crankshaft seal work on Ford 6.7L Powerstroke engines. It covers 2011-2021 F-250/350/450/550, plus 2016-2022 F-650/750 and related chassis. The kit emphasizes high-precision, CNC-machined steel with black anodized coating for durability and corrosion resistance. A key note is the front adapter ring compatibility for specific model years, so users should verify model alignment before use to avoid incorrect installation or damage to the seal.
Rear Main Crankshaft Seal & Wear Sleeve Installer Alt ST-224C

The Danti ST-224C installer is built to work with a range of diesel engines, including Cummins 3.9L to 9.0L families, and is listed for use with several 6.7L variants. Constructed from robust carbon steel, the tool is designed to withstand demanding workshop conditions and provide a long service life. It focuses on ensuring seals are installed without damage, aligning with precise depth requirements to prevent leaks.
maXpeedingrods 303-1514 Rear Crankshaft Seal Installer

The maXpeedingrods kit is targeted at 2011-2021 Ford F-250/350/450/550 Super Duty models with the 6.7L Power Stroke engine, plus 2016-2021 F-650/750 models. It promises easier rear crankshaft seal installation while preventing seal damage and leaks. The kit includes the 303-1514 part number and an alternate ST-138 reference to ensure compatibility across different production runs, helping mechanics achieve the correct installation depth consistently.
6.7L Power Stroke Rear Crankshaft Seal Installer Tool 303-1514 Alt ST-138

Bonbo’s 303-1514 rear crankshaft seal installer is tailored for the 6.7L Power Stroke engines across Ford’s Super Duty lineup, including F-250 through F-550 (2011-2021) and F-650/F-750 (2016-2021). The kit’s emphasis is safe, accurate seal installation to prevent leaks, with a focus on achieving the correct seal depth. It provides a compact, dedicated tool set that supports a reliable installation process without damaging the seal during operation.
303-1514 Rear Crankshaft Seal Installer Kit For 2011-2021 Ford

The Qagea rear crankshaft seal installer tool is compatible with 2011-2021 Ford Super Duty models (6.7L Power Stroke) and 2016-2021 F-650/F-750 variants. It replaces older part numbers like 303-1514 and ST-138, offering a reliable installation process that helps ensure the crankshaft oil seal sits at the correct depth. The tool emphasizes durability and precise fit to minimize the risk of seal damage and leaks.
Buying Guide
Key considerations when choosing a 6.7L rear main seal installer or remover kit include compatibility, tool quality, and installation precision. A few perspectives to consider:
- Compatibility: Confirm that the tool is designed for your exact model year range and vehicle configuration. Some kits specifically cover 2011-2021 F-Series Super Duty trucks, while others mention additional models like F-650/750. Always cross-check part numbers and model notes.
- Tool quality and material: Look for CNC-machined steel, black anodized finishes, and heavy-duty construction that resist corrosion, impact, and wear. These features help extend the tool’s service life in tough workshop environments.
- Installation depth accuracy: The primary goal is to install rear main seals at the correct depth to prevent leaks. Tools that provide depth guides, precise sleeves, and alignment aids reduce the risk of damage to seals during installation.
- All-in-one versus specialty: All-in-one kits that cover front and rear seals can save time, but may be bulkier. Specialty rear-seal tools may offer more precise depth control and simpler use for the rear seal specifically.
- Warranty and support: A warranty (such as 1 year or 12,000 miles) provides a cushion against manufacturing defects. Consider the vendor’s reputation and return policy.
- Manufacturer guidance: Some tools specify model-year caveats (for example, certain adapters not suitable for newer model years). Always read the notes to avoid incorrect installation that could damage seals or engines.
When selecting among these options, assess whether you primarily need a rear-seal installer alone or a broader front-and-rear kit for ongoing engine maintenance. Price should be weighed against build quality, warranty, and compatibility with your fleet or personal vehicle. For professional shops, investing in a durable, multi-model kit can yield long-term savings by reducing installation errors and leaking seals.