{"product_id":"602030204025-main-bearing-set-ms2248p25mm","title":"Mercedes Sprinter Crankshaft Main Bearing Set 0.25mm Oversize – Mahle | T1N OM612 \/ OM647 | #MS2248P (2001–2006)","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWhen a T1N Sprinter's crankshaft journals show wear beyond standard clearances and require grinding to restore a true, round surface, standard-size bearings will not restore proper oil film clearance — and running undersize journals with standard shells is the fastest way to destroy a freshly rebuilt bottom end. This is the Mahle crankshaft main bearing set in 0.25mm oversize for T1N Sprinters equipped with the OM612 or OM647 5-cylinder diesel engine, for use after crankshaft journals have been precision-ground 0.25mm undersize.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhat This Part Does\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe crankshaft main bearing set consists of the upper and lower bearing shells that support the crankshaft at each main journal in the engine block. The bearings maintain a precise oil film clearance between the crankshaft and the bearing bore — this hydrodynamic film is the only thing separating the spinning crankshaft from the bearing material under full combustion load. When crankshaft journals develop scoring, taper, or out-of-round wear that places them outside standard tolerances, the journals must be ground to an undersize dimension to restore a true, smooth surface. The 0.25mm oversize shells are dimensioned with a thicker backing to compensate for the material removed during grinding, restoring the correct oil clearance on reground journals. Mahle is a leading OEM engine component supplier and the MS2248P set is manufactured to the tri-metal construction specification required for diesel engine service life under sustained high-load operation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eCommon Reasons for Undersize Bearing Selection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCrankshaft journals found scored, tapered, or out-of-round during engine teardown\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMain bearing knock confirmed and journals measured below standard specification\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eEngine rebuild where crankshaft has been sent out for precision grinding to 0.25mm undersize\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStandard-size bearings showing accelerated wear patterns indicating the journals are no longer true\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhen to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eUse when crankshaft main journals have been precision-ground 0.25mm undersize and confirm journal diameter with a micrometer before selecting bearing size. Always verify clearances with plastigauge after installation — do not assume ground journals are exactly 0.25mm undersize without measurement. If journals require removal beyond 0.25mm, the 0.50mm set is the next option.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eT1N OM612 \/ OM647 Specific — Engine Verification Required\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis bearing set is for T1N Sprinters equipped with the 2.7L OM612 or OM647 5-cylinder diesel engine. It is not compatible with NCV3 Sprinters equipped with the 3.0L OM642 V6 or 2.1L OM651, or VS30 Sprinters. Always verify your engine code before ordering.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2001–2006 Mercedes-Benz Sprinter 2500 – OM612 \/ OM647 5-cylinder diesel (T1N)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2001–2006 Mercedes-Benz Sprinter 3500 – OM612 \/ OM647 5-cylinder diesel (T1N)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2003–2006 Dodge Sprinter 2500 \/ 3500 – OM612 \/ OM647 5-cylinder diesel (T1N)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e✔ 0.25mm oversize — for use only after crankshaft journals have been precision-ground\u003cbr\u003e✔ Always verify journal diameter with micrometer and confirm clearances with plastigauge\u003cbr\u003e✔ Replace connecting rod bearings at the same time during any bottom-end rebuild\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003ePart Numbers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eManufacturer: Mahle — MS2248P25MM\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSKU: 602030204025\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BlueTec Sprinter Parts","offers":[{"title":"Default Title","offer_id":46583897227438,"sku":"","price":199.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/bluetecsprinterparts.com\/products\/602030204025-main-bearing-set-ms2248p25mm","provider":"BlueTec Sprinter Parts","version":"1.0","type":"link"}