{"product_id":"acl-trimetal-reinforced-rod-bearings-volvo-b20-b23","title":"ACL Race Series connecting rod bearings for Volvo B20*, B23*","description":"\u003cp\u003eACL Race Series connecting rod bearing set for Volvo B20*, B23*, part number 4B2726H. This is ACL’s competition range, the same as those fitted in drift, circuit, and drag racing engines.\u003c\/p\u003e\u003cp\u003eThese are tri-metal bearings: SAE 1010 steel backing, a copper-lead-tin intermediate layer approximately 0.3 mm thick, a nickel barrier, and a lead-tin-copper overlay that conforms to the crankshaft surface and resists seizure. In connecting rod bearings, the overlay is thinner to better withstand fatigue.\u003c\/p\u003e\u003cp\u003eACL manufactures them with more \"crush\" (housing interference) than a standard bearing to ensure a secure fit and better heat dissipation, and with more eccentricity, which helps maintain the oil film when the housing deforms at high RPMs.\u003c\/p\u003e\u003cp\u003eIn standard size, ACL specifies this for a connecting rod journal of 48.984 to 49.004 mm, with a bearing width of 24.0 mm. For this diameter, they recommend an oil clearance of approximately 0.052 to 0.062 mm, measured with a micrometer and bore gauge. If the crankshaft has been ground, the measurements will change.\u003c\/p\u003e\u003cp\u003eThey do not have the final silver-tin plating found on standard bearings, so their dark color—ranging between brown, black, and bluish—is factory standard and does not indicate a defect. 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\u003eBefore ordering, please confirm the measurement of your crankshaft (standard or ground); if you have any questions, please contact us with your engine code.\u003c\/p\u003e","brand":"ACL","offers":[{"title":"Default Title","offer_id":50813130670414,"sku":"ACL-4B2726H\/148","price":95.38,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0816\/7329\/0062\/files\/acl-rod-bearings_a4be1737-0297-4e02-a392-301f1b243384.jpg?v=1735903979","url":"https:\/\/driftandgrip.com\/en\/products\/acl-trimetal-reinforced-rod-bearings-volvo-b20-b23","provider":"Drift \u0026 Grip","version":"1.0","type":"link"}