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BMW S62 S54 M50/52/54 S50/52 US spec performance connecting rod bearings

We are proud to offer motorsport grade connecting rod bearings for various BMW engine. OEM bearing available in only one grade, sometimes hard to source, and definitely not cheap. This project’s three goals were as follow, in order of importance:

  • Development of high performance connecting rod bearings
  • Readily available supply of various grades for bearing clearance optimization and crankshaft repair
  • Reasonable price point compared to OEM products

Questions have come up in online forum groups about the validity of our product and need for extra clearance bearing. Terms such as “because racecar” comically used. Offering various grades other than OEM “standard” allows for more precise bearing clearance adjustment and journal repairs upon signs of damage. All engine parts are subject to manufacturing tolerance. Crankshaft journals can be ground larger and connecting rod bearing ends honed bigger than the target. Worst case scenario occurs when an inadequate rod bearing clearance leads to bearing, crank, and eventually engine failure.

 

DEVELOPMENT: PHASE 1

This project started with connecting rod bearing development for the M20/50/52/54 series of engines. US spec S50B30 and S52B32 also use same connecting rod bearings. We work with ACL using their Race series tri-metal bearings for this application. Superior metallurgy allows increased bearing loads for the high-performance applications. Another important advantage of PRE bearing is size availability. We offer connecting rod bearings in following grades:

  • H-STD, standard clearance
  • HX-STD, each shell undersize by .0005in for total increase in clearance of .0010in
  • H-.025, each shell oversize .0005in for total decrease in clearance of .0010in
  • H-.25, .25mm(.010in) oversize, repair size #1, used when repairing/grinding damaged journals
  • H-.50, .50mm(.020in) oversize, repair size #2, used when repairing/grinding damaged journals

IMG_1409IMG_1411

 

DEVELOPMENT: PHASE 2

The second phase of development focused on connecting rod bearings for BMW S62B50 engine. This 5.0-liter V8 engine can be found in E39 M5 and E52 Z8. We collaborated with King bearing for this project. King XP series bearings are of tri-metal construction with hardened steel backing, silver plating, sintered copper, and hardened overlay. These bearing work exceptionally well in endurance racing applications. We offer connecting rod bearings in following grades:

  • H-STD, standard clearance
  • HX-STD, each shell undersize by .0005in for total increase in clearance of .0010in
  • H-.25, .25mm(.010in) oversize, repair size #1, used when repairing/grinding damaged journals

IMG_1383 IMG_1384

 

DEVELOPMENT: PHASE 3

The third phase of development focused on connecting rod bearings for BMW’s legendary S54B32 engine. This 3.2 liter inline 6 engine can be found in E46 M3 and Z3, as well as E85 Z4. We collaborated with King bearing for this project. King XP series bearings are of tri-metal construction with hardened steel backing, silver plating, sintered copper, and hardened overlay. These bearing work exceptionally well in endurance racing applications. We offer connecting rod bearings in following grades:

  • H-STD, standard clearance
  • HX-STD, each shell undersize by .0005in for total increase in clearance of .0010in
  • H-.25, .25mm(.010in) oversize, repair size #1, used when repairing/grinding damaged journals

IMG_1381

PRE connecting rod bearing can be purchased from our eBay store:

S54 connecting rod bearings

S62 connecting rod bearings

M20 M50 M52 M54 S50US S52US engine connecting rod bearings

M40 M42 M44 connecting rod bearings

12 thoughts on “BMW S62 S54 M50/52/54 S50/52 US spec performance connecting rod bearings

  1. Hello, accurate bearings to buy a BMW E39 S62 V8, GJ20499 VIN, engine dentificados as H-0.25.
    My address is: street: Independencia 2073
                               city : Mar del Plata
                               Prov. Buenos Aires
                               Country: Argentina
    My name is : Leonidas Enrique Camino
    Preferred DHL shipping
    Please let me know the total price as I pay by credit card.
    thanks

  2. please precise response.

  3. I do not speak English . I am writing with google translator.
    So I did not inform me on the phone. You speak Spanish?

  4. Wanting to purchase rod bearing kit for my S62. However, I am thinking about supercharging at some point, so what kit would you suggest I purchase.

    1. Hello Lucas,
      Standard bearing grade still works sufficiently well for your needs. We offer various grades for engines requiring repair, and undersize crankshaft grinding, or instances when fitting connecting rods with bearing end inside diameter at different specification than OEM. If your engine uses OEM connecting rods you require standard bearings grade. Currently bearings in stock. Email or call to place order.
      Thank you

  5. Good afternoon,
    I’d need a set of rod bearings for an S62, with the extra clearance.
    How much would that be shipped to Canada?
    Thanks

    1. Hello Jordi,
      Currently, we only have the standard grade in stock but we can make you a set of undersized grade bearings with additional clearance. Manufacturing lead time is five business days. The cost will be $470, which includes shipping to Canada. Please check your email for a confirmation email and payment instructions.
      Regards,
      PRE

  6. Hello Dear,
    I need Rod Bearings for two rods (both upper and lower shells), that is, two upper shells and two lower shells with size #2 (0.50) for e39 m5 (s62b50). Can you make it for me? If so, how much does it cost?
    Look forward to hear from you,

    Regards,
    Hardy

    1. Hello Hardy,
      We do not offer 0.50mm oversize #2 grade bearing for the BMW S62B50 engine. For this engine, we offer STD, STDX(.025mm/.001in extra clearance), and 0.25mm oversize #1. If your crankshaft is so heavily damaged that you require 0.50mm oversize rod bearings, I suggest spray welding the crankshaft and regrinding the journals to standard size or sourcing a good used, or new, replacement crankshaft in standard size.
      Regards,
      PRE team

  7. Hello Pavel,
    I asked around locally, no body supported me for spray welding, and it costs much to buy a new crankshaft, but I think there is an alternative which is rod bearings of S54 because they are of the same journal size (49mm). I want to take your opinion about this, I will be grateful.
    Looking forward to hear from you,

    Regards,
    Hardy

  8. How many miles have you tested the s62 standard bearings?

    1. Hello Karl,
      Please check your email for additional information request.

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