The Litchfield fix for the infamous ‘Crank Hub issue’, which affects the 3.0 litre S55 engine found in the F8x BMW M3, M4 and the M2 Competition model is now available. Our solution is two part.
If your car has shown no issues to date and is running fine, then we fit our crank bolt capture plate. With our BMW diagnostic laptop, we can plug in to your car and ascertain if the crank bolt has slipped at all. The capture plate can be fitted over the top of your crank bolt and secured to the crank pulley assembly. This process typically takes 4-5 hours labour. This is enough for many vehicles and we provide a 12 month warranty on the part, such that should you see a crank hub failure in that time, we will deduct the cost of the labour to install the capture plate from the cost to install the full crank hub replacement, the second part of our fix.
If your car already has an error then you automatically need the second part of our fix which is a replacement crank hub assembly, with oil pump drive pulley and cam drive pulley already installed. This also includes our crank bolt capture plate. This is due to the fact that the OEM parts are all one use only, and if any slipping has occurred the bolt cannot just be re-tightened. This complete solution is still a drive in/drive out solution but we would require the car for two days. Within the cost, we include and replace all consumables including a full oil and coolant change, new crank bolt, new crank main seal and cam cover gaskets. Our solution uses a replacement hub that is machined in house from a billet piece of specialist steel designed originally for Helicopter rotors. We have the latest BMW workshop manuals and diagnostic equipment, and have even developed our own bespoke service tools for this job, so you can rest assured your car will be in good hands.
For more in depth information, please look at our blog post HERE