The crank hub issues on BMW’s S55 & N55 engines are well known. The MMR Performance Crank Hub Capture Plate secures the head of the OE crank bolt and prevents it from turning or being able to loosen ensuring a secure location. The perfect compliment to either the MMR One-Piece Crank Hub, or the OE crank hub.
Benefits of fitting?
Issues relating to the standard three-piece crank hub on the S55 & N55 engine are widely known, but include the need to ensure the OE crank bolt can't loosen, which is one cause of the crank hub friction plates starting to slip. The crank bolt is susceptible to loosening due to the engine's natural vibrations and harmonics, meaning that with just the slightest loss of torque, your timing will slip out of correct adjustment. With potentially disastrous consequences.
For the ultimate solution, which is strongly recommended for high powered, or track cars, you should plan to upgrade both this Capture Plate AND fit our MMR Single-Piece Crank Hub.
However, that's a significant task for an experienced technician. Install of this Capture Plate is a simpler job to install and provides a great deal of added protection - making it a sensible 'first upgrade' for any N55 car being used on the road if you don't want to incur the full expense of the Single-Piece Crank Hub.
Machined from T-6061 billet aluminium before being anodised in our trademark finish, the MMR Performance Capture Plate completely surrounds and secures the head of the OE crank bolt, making it physically impossible for it to turn or loosen.
Secured to either the MMR one-piece crank hub, or the OE crank hub, the elongated slots ensure a perfect, secure installation, every time.
Installation of the capture plate is also possible with the engine remaining in-situ, with just the need to drop the radiator, in order to gain adequate access to install.
S55 I N55
2011 - 2020
The MMR Capture Plate is a great starting point to avoid the dreaded hub-slip problems for standard cars, and those not used in track conditions.
However, for complete peace of mind, and certainly when it comes to highly modified or hard-driven cars, we strongly recommend selecting the One Piece Crank Hub plus Capture Plate as the only way to be 100% certain to avoid future costly failures.
Installation of the capture plate is possible with the engine remaining in-situ, with just the need to drop the radiator, in order to gain adequate access to install.
We strongly recommend that installation of the Capture Plate is carried out by an experienced technician in an appropriately equipped workshop.
How we develop.
Every MMR Performance upgrade is developed and tested here in the UK by our expert engineering team of BMW enthusiasts.
Nothing gets the MMR logo until we've thoroughly proven it on road, track and dyno.
That's the MMR Performance difference.
How to buy?
Our network of expert MMR Performance dealers can supply the full range, together with product guidance and advice, plus often an experience fitting service.
If you haven't got a MMR Performance Partner Dealer close to you, don't worry! Remember you can buy direct from our MMR Performance webshop. Click here to browse and shop online, for worldwide despatch.