Fixing the S55 Crank Hub weak link on the BMW M2 M3 M4, CRANK HUB SLIP!

In this Vlog, we run through BMW S55 Crank shaft slip issues and fixes
'The S55, BMWs mighty three litre straight six twin-turbocharged engine, as fitted to the M2 competition, M3 and M4 models is a fantastic power plant, with huge tuning potential, it does however have one major ‘flaw’ in its design, and that is the crankshaft hub/camshaft chain drive interface, which has unfortunately become a very common failure point when tuning, and the issue can even affect vehicles with a stock engine, albeit rarely'
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S55 Crank hub infomation page:
www.wgmotorworks.co.uk/s55-cr...
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Rolling Road / Dyno - 4WD Dyno Dynamics, Dyno Tech
Location - South East, Kent, near Sittingbourne
/ wgmotorworks
/ wgmotorworks
www.wgmotorworks.co.uk

[@robertolombardi3698]

Great video Warren and a great insight to the Crank hub issue.

[@P44TKO]

Only the best 🔥nice detailed video!

[@ARDEN440i]

Very informative video Warren. 👍🏾

[@F83Marc]

can you do stage 2 bootmod with the capture plate?

[@idefix19876]

❤

[@allmech_BMW_fault_finding]

Hi Warren. We do this with the Mosselman kit. Never had any disasters yet Did you ever have the valvetronic motor actuator short? Had one 2 years ago the whole car shut down as the 5v power supply from DME shorted the 5v consumers including the fuel pump rotor position sensor. Disconnected and it started right up :) I did a massive top end rebuild on one of these but sadly the video was deleted haha. Just subscribed. Nice channel and best of luck with growing it :)

[@WGMotorworksYouTube]

No, never had that issue before! Always disconnect the battery when doing the job mind!

[@allmech_BMW_fault_finding]

@@WGMotorworksTH-cam I had two of those in the last few years from car sales companies. No doubt they jump started them. One to watch out for and not just on the S55 either👍

[@wolfischwarz9887]

Hello,
if I drive my m2c with Stage 1 and 500hp and 100 Newton meters more (it is an automatic ), is the risk high? I have the components series, so only software
Greetings from Germany

[@darrenboston342]

These normally come undone due to aggressive downshifts, the stretch bolt is torqued to 600lbf….. they have been known to come undone in traffic believe it or not!!😳
If your running big BHP prevention is better than cure but if you keep an eye on these & check the torque you shouldn’t have any problems.

[@davetreanor5303]

very good explanation, does the coolant system need to be drained and re pressurised in order to get access to crankhub?

[@WGMotorworksYouTube]

Yes, the system is drained to remove the Rad - this is then vacuum bleed before refilling

[@user-zt4kz8rx8k]

lovely video,
I've got 2 questions if you don't mind
How deep you have to drill in order to get the insane performance pinned hub in?
Then I guess removing the front subframe means realigning the front axle ?

[@WGMotorworksYouTube]

The Pins are 4mm deep - so we drill 5mm to ensure fully inserted
The subframe has dowel pins to locate at the front, so typically unlike other subframe designs there is no issue with alignment after

[@user-mm9rz5id1z]

Great video mate , how much do you charge to do this job? I have a 2017 F80 I’ve been planning on having this done soon

[@WGMotorworksYouTube]

Currently the service is £1999 :)

[@Irvysan]

Would you still recommend this on a stock engine or is it unlikely to be needed at stock torque?
Also how much?

[@WGMotorworksYouTube]

For Stock engine its not needed, you can also tune with limited torque and peak HP without too much worry

[@jasonhallam2644]

single piece hubs are better than any hub that has pins

[@jasonkay6632]

Hi was this the same process and cost for the m135i n55 thanks

[@williamdtt]

No problem with n55

[@elainaorlando8400]

"Promo SM"