{"product_id":"acl-trimetal-reinforced-main-bearings-peugeot-tu3jp-tud5-diesel","title":"ACL Race Series main bearings for Peugeot TU3JP, TUD5 Diesel","description":"\u003cp\u003eACL Race Series main bearings for Peugeot TU3JP, TUD5 Diesel, reference 5M2797H. These support the crankshaft in the engine block and, in a tuned engine, are critical for ensuring proper oil delivery throughout the entire crankshaft.\u003c\/p\u003e\u003cp\u003eThey feature a tri-metal structure with a steel backing, a copper-lead-tin lining, a nickel barrier, and a soft overlay that conforms to surfaces and prevents seizing even under very high loads.\u003c\/p\u003e\u003cp\u003eThe upper bearings feature a full 180° oil groove, while the lower bearings have a partial groove to maintain oil flow to the connecting rods, with a tapered groove end to prevent pressure spikes. ACL manufactures them with more \"crush\" than standard bearings to ensure a secure fit and better heat dissipation, as well as increased eccentricity to help maintain the oil film when the housing deforms at high RPM.\u003c\/p\u003e\u003cp\u003eIn standard size, ACL specifies them for a crankshaft journal diameter of 49.962 to 49.981 mm, recommending an oil clearance of approximately 0.053 to 0.063 mm. If the crankshaft has been ground, the dimensions will change.\u003c\/p\u003e\u003cp\u003eThey do not have the final silver-tin plating of standard bearings, so their dark, brownish-black and bluish appearance is factory-standard and does not indicate any defects. ACL advises against polishing the bearing surface to adjust clearance; if more is needed, they should be combined with the HX version, which provides an additional 0.025 mm of clearance.\u003c\/p\u003e\u003cp\u003eIf the crankshaft has been ground or you are unsure of the required size, please write to us with your engine code before ordering.\u003c\/p\u003e","brand":"ACL","offers":[{"title":"Default Title","offer_id":50813108420942,"sku":"ACL-5M2797H","price":104.25,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/beb50cdb8aedff62888a19fe8eadd8fa.jpg?v=1735903860","url":"https:\/\/driftandgrip.com\/en\/products\/acl-trimetal-reinforced-main-bearings-peugeot-tu3jp-tud5-diesel","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}