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    Bearing Assembly, M156


    Availability: In stock


    Bearing Assembly, M156

    For those that are building their M156 / M159 engine, either as a rebuild or a performance build, Weistec Engineering offers the complete M156 Engine Bearing Set. The set includes both the main bearings and the rod bearings. All bearings are Mercedes OEM and are compatible with the OEM connecting rods as well as our Billet Rods.

    Key Features:

    • Bearing Material Compares to Aftermarket Style Race Bearings

    • Complete Set Of Main Bearings

    • Complete Set of Rod Bearings

    • Compatible with OEM and Weistec Billet Rods

    M156 Main Bearing Code Identification Guide

    The M156 Engine has 5 main bearings. When ordering a Main Bearing Assembly, it is necessary to provide Weistec Engineering with the bearing code for your specific engine. It is vital that the code is provided to ensure that the proper bearings are supplied for your specific engine. The identification process is very simple. Actual assembly of an M156 engine must be performed by an experienced engine builder following Mercedes OEM specifications for torqueing procedures.

    Location 1 is on the snout of the crankshaft. It is a 5 character code consisting of any combination of the following letters: R, Y, G, B. In the picture the code is circled in red.

    Location 2 is on Bank1 side of the engine just behind where the engine mount bracket bolts on to the engine block. It is a 5 digit code consisting of any combination of the following numbers: 1, 2, 3, 4. In the picture below the code is circled in red. Note: Very early M156 engines may not have this code. If your engine is an early M156 engine and does not have the code in location 2, the code from location one is all that is necessary

    PDF Filem156_main_bearings (288.4 KB)Download


    This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.
    Some Weistec Engineering performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website.
    It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.
    All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.


    WARNING: Cancer and Reproductive Harm