SKU: 93830167215

034Motorsport 1-Piece, Pinned & Unpinned Crank Hub w/ Crank Bolt Capture Plate - BMW N55 & S55

Sale price$530.71 Regular price$589.68
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Description

034Motorsport 1-Piece, Pinned & Unpinned Crank Hub w/ Crank Bolt Capture Plate - BMW N55 & S55The BMW N55 and S55 platforms deliver incredible performance, but their factory multi piece crank hubs are a known weak point capable of catastrophic timing drift or total failure. The 034Motorsport 1 Piece Pinned Unpinned Crank Hub with Crank Bolt Capture Plate is engineered as a complete, motorsport grade solution that eliminates slip, locks in long term reliability, and protects your engine under the highest levels of power and abuse. Unmatched

The BMW N55 and S55 platforms deliver incredible performance, but their factory multi-piece crank hubs are a known weak point capable of catastrophic timing drift or total failure. The 034Motorsport 1-Piece Pinned/Unpinned Crank Hub with Crank Bolt Capture Plate is engineered as a complete, motorsport-grade solution that eliminates slip, locks in long-term reliability, and protects your engine under the highest levels of power and abuse.

Unmatched Engineering. Zero Compromise:

A Permanent Fix for the Factory Crank Hub Problem

The factory crank hub used in BMW’s N55 and S55 engines is a well-known weak point, particularly as power levels increase. The OEM design uses three individual sprocketed pieces that drive the timing chains off the crankshaft. Importantly, none of these sprockets are mechanically linked together nor to the crankshaft . They rely only on friction washers and the clamping force of the crank bolt to stay aligned.

Under higher horsepower, rapid throttle transitions, hard launches, or even completely stock operation, the friction surfaces can slip. When this happens, the timing components rotate out of alignment, causing the engine to fall out of mechanical timing. This can quickly lead to bent valves, piston-to-valve contact, or catastrophic engine failure.

A True Mechanical Solution Instead of More Friction:

The 034Motorsport 1-Piece Pinned Crank Hub replaces the entire multi-piece factory stack with a single CNC-machined billet EN36 steel unit. By combining all timing sprockets into one rigid body, every driven timing component remains physically linked, eliminating the possibility of internal hub slip.

You can configure the hub in the way that best suits your build:

Unpinned Installation

The 034 design can be installed in an unpinned configuration using the factory crankshaft with no drilling required. This setup works seamlessly with the included Crank Bolt Capture Plate, which locks the crank bolt in position and prevents any chance of bolt movement.

Pinned Installation (Recommended for Heavy Abuse/High Power)

For those who want maximum mechanical security, the hub can also be installed in a 4-pin configuration, physically interlocking it with the crankshaft. One of the key advantages of the 034Motorsport Crank Hub is that it eliminates the need for a separate hub version. You can choose pinned or unpinned using the same part.

To ensure safe and accurate drilling, the kit includes a carbide drill bit and a dedicated drill guide and alignment jig. Most competing kits only provide a high-strength steel drill bit, which wears quickly when cutting into the crankshaft.

Crank Bolt Capture Plate: The Second Layer of Defense

Machined from 6061-T6 billet aluminum and anodized for long-lasting protection, the Capture Plate surrounds and locks the OE crank bolt in place, preventing any possibility of bolt walk-out. Paired with the 1-Piece Hub, this configuration eliminates both crank bolt and crank hub slip, protecting against the most common N55/S55 timing failures.

Elongated mounting slots allow the Capture Plate to be used with both OE and 034Motorsport crank hubs, ensuring a precise and secure installation.

Built to Protect Your Engine, No Matter the Power Level:

From aggressively tuned street builds to fully track-prepped cars, the 034Motorsport 1-Piece Pinned Crank Hub and Capture Plate system is engineered to be the definitive solution for securing the crank hub. With uncompromising materials, precision engineering, and a complete installation package, this upgrade delivers the reliability and confidence your BMW deserves.

Upgrade once. Protect forever.

1-Piece Crank Hub Features:

  • 1-Piece CNC-Machined Hub, Installable In 4-Pin Or Unpinned Configuration
  • Prevents Crank Hub Slip And Failure On High-Power Engines
  • Billet EN36 Steel, Heat-Treated With 0.75 Mm Case Hardening
  • High-Strength Design Built For Extreme Power And Abuse
  • Optional Precision Dowels Mechanically Lock Hub To Crank (Crank Drilling Required)
  • Complete Installation Kit: Jig, Guide, Locating Bolt, And Carbide Drill Bit
  • Includes New OE Crank Bolt

Crank Bolt Capture Plate Features:

  • Machined From 6061-T6 Billet Aluminum
  • Anodized For Durability And Long-Lasting Finish
  • Surrounds And Locks OE Crank Bolt, Preventing Loosening
  • Fits 034Motorsport Or OE Crank Hub With Elongated Slots For Secure Install
  • Prevents 3-Piece Crank Hub Slip On S55 And N55 Engines
  • Installs With Engine In-Situ By Dropping Radiator For Access

 

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SKU: 93830167215

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4.7 ★★★★★
Based on 27 reviews
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Constant Reader
Boise, US
★★★★★ 3
Bit of a snore
Format: Kindle
Mordecai Tremaine is a retired tobacconist and an amateur detective. He is invited to spend Christmas with an acquaintance in a country manor house who specifically tempts Mordecai Tremaine by hinting at a threat. This story has a period feel to it with servants, snow, secrets, and murder. The pacing is laborious. I hoped that the pace would improve when a murdered person in a Father Christmas suit is found on the floor in front of the Christmas tree. Alas, it was not to be. The character list is very long, and the characters are not well developed. This is the first book in a series featuring Mordecai Tremaine (who is only referred to by last and first names). I have a soft spot for British mysteries, including period British mysteries like those by Ngaio Marsh. While the mystery has its twists and turns as Mordecai Tremaine investigates to assist the police, it never quite clicked for me. I am not likely to read any of the other books in the series.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 6, 2018
G
Verified Purchase
Grandma
Carnegie, US
★★★★★ 5
Enjoyable Classic mystery
Format: Kindle
I am an avid fan of vintage mysteries, and “English country house” mysteries are among my very favorites in that genre. I enjoyed this one very much and was pleased to see that there were two others available and a couple more being published. This book was my idea of a terrific cozy type mystery, and I enjoyed it very much. The Christmas setting added to its appeal. Mordecai Tremayne, the detective in this story is just eccentric enough to be interesting without being stereotyped. He observes people, and makes deductions based on these observations, along with his knowledge of human nature. In retrospect, he is almost a bit like male version of Miss Marple, although this did not strike me as a I read the book. This was a fun book to while away a few hours, and I look forward to reading others in this series. Highly recommended for fans of vintage mysteries, and cozies.
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Reviewed in the United States on August 17, 2018
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Verified Purchase
smithirowa
Lowell, US
★★★★★ 4
Leaves You Wanting More
I read about this novel right after Christmas, but I decided to order it anyway. It was not supposed to arrive until some time in February, so I was pleasantly surprised when I received it within a few days of my order. With the snow finally falling in the Chicago area, I knew this would be a good time to read this book. The book begins with a summary of the case with somewhat overwrought language. However, as it moves on to the characters, it becomes more successful. It is important to remember that the novel was written in the 1940s, which means that we have a world that is slower paced than the 21st century. Of course we are looking at a wealthier segment of society in rural England, but this pace allows us to study the scenery and the characters more carefully. This is a world with a mansion that can house a number of guests for Christmas with these guests being able to stay over a few days with a pleasant host. The characters are mostly forgettable with the major exception of Mordecai Tremaine as the amateur detective who helps solve the case. He is a character who is unforgettable. The ending is well plotted, and it leaves the taste of a delicious Christmas dinner in the mouth of the reader. The author, Francis Duncan, wrote in the 1930s and 1940s, and this is the first book of his to be republished. I can only hope that other books by this author will be republished as well and republished soon or at least in time for me to read them by next Christmas. Without knowing anything about his other books, it would be nice to think that I could have other seasonal stories waiting for me in the future. The ending still remains in my mind, even several weeks after I have read the book. It would be delicious to meet Mordecai Tremaine again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2016
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Izybella
Alexandria, US
★★★★★ 5
I read it and LOVE it!!
Format: Paperback
I actually read this book for December 2021 and it was the perfect murder mystery book that takes place during the wintertime! If you like the style of writing from Sherlock Holmes or Agatha Christie then you will love this book! Also, you don't have to worry about reading certain books before this one because the series has its own separate story for each book! I loved the story so much that I immediate order another book from the series!!
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Reviewed in the United States on December 26, 2021
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Carol Mello
Omaha, US
★★★★★ 3
Not as good as "Murder has a motive"
Format: Kindle
Actually, if one looks at the original copyrights of this book and "Murder has a motive" , it is clear this is the second book, not the first. In addition, the notoriety Mordecai Tremaine gained from the Dalmering case is mentioned in the text of this book. This book moves much more slowly than " Murder has a motive" and the secrets of the suspects are harder to figure out. I did notice the murderer's slip up during the murder discovery scene. The book ends abruptly and another character who is a psychopath apparently is going to get away without punishment of his despicable behavior that has been going on for a very long time. The plot is original in nature which is a plus. Because of the plot slowness (I trudged onward to the end) and the lack of justice for the psychopathic character, I had to remove a star for each.
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Reviewed in the United States on March 23, 2021

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