BMW E90 E92 E93 M3 Conrod Bearing Shell & Bolt replacement

We stock the ACL Conrod Bearings (commonly known as 'uprated').
We also stock Genuine BMW Conrod Bearings (commonly know as 702/703).

£1595 for ACL Bearings & BMW Bolts.     (Engine Mounts can be added for £100).
£1820 for BMW Bearings & BMW Bolts.    (Engine Mounts can be added for £100).

Our prices include:

  • Bearings & Bolts
  • Labour
  • Castrol 10w60 M-Power Engine Oil
  • Genuine BMW Sump Gasket
  • Genuine BMW Oil Filter Kit
  • Genuine BMW Oil Pump Suction Tube O-rings
  • Genuine BMW Power Steering CHF 11S Fluid
  • Genuine BMW Power Steering Sealing Rings
  • Consumables
  • New bearing clearances measure with Genuine BMW-supplied Plastigauge
  • Digital Pictures
  • Printed Clearance Measurement Report
  • VAT.

As the E9x M3 platform ages, there are increasingly more items which are deteriorating.
Here's an example video of some of the common items we find:

Optional extras:
ou now have the option of having James Redish carry out a 15 minute technical video for you. This video is personal to your vehicle and includes your name and registration number plate. It includes technical detail and visuals of an area you're never likely to see again on your vehicle. We record up close and personal to show you the inside of your engine and specifically concentrating on the Crankshaft, Conrods, Bearings, as well as see the underside of pistons, gudgeon pins, conrod bolts, and your old conrod bearings. The main highlights of the video are the Plastigauge measuring process to ensure the oil clearance is within the BMW tolerance. As well as an overview and discussion regarding the wear on your old bearings (which you get to take home with you). The video package we offer is not mandatory and is offered at an optional cost of £90 inc VAT.

This additional service must be requested at the time of your booking.

See example video below of what you can expect:

Further technical info, videos, and pictures can be found below:

The BMW 088/089 Conrod Bearing Shells are known to wear at an unusually quicker rate when compared to BMW's previous M-power engines like the S50 S54 M3, and S62 M5.

This is due to the non-industry-standard tighter clearance specified by BMW to their bearing manufacturer Clevite during the development stages in 2006.
BMW also used a high viscosity engine oil in this engine (against Clevite's recommendations) which is Castrol 10w60 (aka Edge, Supercar, FST, TenWeightSixty).
These 2 issues (tighter than usual clearances coupled with a thick oil) results in premature Conrod Bearing wear on the S65 V8 engine.

We have a company E90 M3, 2008 model, with 79,000 miles which we have fine-tuned a repair procedure for methodical but affordable replacement of the S65 Conrod Bearing Shells.

We are one of the only companies happy to share our measurement data and process of measurements of the Conrod Bearing clearance.
We have measured every single BMW M-power engine that we've ever replaced Conrod Bearing Shells on since our company's inception in 2009.
Over the years we were starting to wonder if our mandatory measurement process was excessive as we were finding no great problems. Then in 2015 we found one bearing shell showed a clearance of over 0.076mm which is outside of BMW's tolerance, yet visually the shell and crank journal was 'OK'. This made our relentless clearance measurements worth while as otherwise just 'replacing bearing shells' would have never have shown the problem. 

So it's very important to measure the clearance of the new bearing shells.
When in situ the human eye can't see the difference between 0.050mm and 0.080mm but yet the difference in terms of engine reliability would be massive.

This is a 10 hour labour process due to our due diligence of measuring the clearances of all the new Conrod Bearing Shells to Crankshaft Journal, and recording the measurement data for you. Along with each time following the correct BMW 3-stage torque process 3x times for each BMW Conrod Bolt.

When considering this complex repair for your E9x M3, make sure you know whether you are simply having your bearing shells/bolts replaced, or whether you're having your bearing shells/bolts replaced, along with comprehensive analysis of clearance measurements backed up with recorded data, plus digital media of the repair.
Otherwise you will not know if the clearances are suitable and it will purely be an assumption that none of the new bearing shells were defective, incorrectly packaged or manufactured, or even microscopically scratched in the packaging for example (it's rare but it can happen).

Please call us on 01179 781889 if you would like to discuss this Conrod Bearing Shell & Bolt replacement on your BMW E90 M3, E92 M3, E93 M3 using the BMW S65 V8 engine.

To make a booking with us for this job, we require a £200 deposit at the point of booking.