Precision Rear Main Seal (RMS) Installation Tool for Porsche
$90.00
Part# EM-RMS-M97/M96
The Rear Main Seal (RMS) is widely considered the “Achilles’ heel” of water-cooled Porsche engines. Even a fraction of a millimeter in misalignment can lead to catastrophic oil leaks, forcing you to redo the entire labor-intensive job.

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Description
Fitment: Porsche 911 (996/997), Boxster (986/987), Cayman (987) | Engines: M96 & M97
Eliminate the Guesswork. Stop the Leaks.
The Rear Main Seal (RMS) is widely considered the “Achilles’ heel” of water-cooled Porsche engines. Even a fraction of a millimeter in misalignment can lead to catastrophic oil leaks, forcing you to redo the entire labor-intensive job.
Our Precision RMS Installation Tool is engineered to solve this specific problem. Designed to press the seal to the exact factory-specified depth every single time, this tool ensures the seal sits perfectly square against the crankshaft, eliminating the risk of “cocked” or uneven installation. Whether you are a professional Porsche technician or a dedicated DIY enthusiast, this tool is mandatory for a successful, leak-free repair.
Key Features & Benefits
- Factory-Calibrated Depth: The tool features a built-in stop that presses the seal to the precise depth required by Porsche specifications.1 No measuring or guessing required.
- Even Pressure Distribution: Unlike generic seal drivers, this tool applies equal pressure across the entire face of the seal, preventing deformation of the delicate sealing lip during insertion.
- Protective Design: The pilot guide protects the inner lip of the seal from getting damaged by the crankshaft edge during the initial slide-on.
- Heavy-Duty Construction: Machined from high-grade, anodized billet aluminum to withstand shop abuse and corrosion.
- Cost Saver: Prevents costly install errors that result in ruined seals and wasted labor hours.
(Note: Not compatible with Turbo, GT2, or GT3 models using the “Mezger” engine block).
| Feature | Detail |
|---|---|
| Material | CNC Machined 6061 Aluminum |
| Drive Type | Uses standard flywheel bolts for press-fit action |
| Finish | Corrosion-resistant Anodized Blue |
| Application | Flywheel/Transmission side |
- Porsche 911: Years 1998–2008 (996 & 997.1 models)
- Porsche Boxster: Years 1997–2008 (986 & 987.1 models)
- Porsche Cayman: Years 2006–2008 (987.1 models)
- Engine Types: M96 and M97 engines
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