{"product_id":"bearing-set-main-193891","title":"Bearing Set - Main for Defender (1986 – 2006) Standard \/ V8 - 4.0 EFI – STC4299","description":"\u003cp\u003eSTC4299 is a standard-size main bearing set for Land Rover's 3.9 and 4.0 litre V8 engines, designed to support the crankshaft within the engine block and maintain precise oil film clearances under load. Main bearings are a wear item subject to oil contamination, heat cycling, and fatigue; worn bearings typically present as low oil pressure, knocking at idle, or crankshaft scoring. Replacement at engine rebuild is essential to restore correct clearances and prevent further crankshaft damage.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eStandard-size shells - fits unmachined, unworn crankshaft journals without additional grinding\u003c\/li\u003e\n\u003cli\u003eFull set covering all main bearing positions across the V8 block\u003c\/li\u003e\n\u003cli\u003eManufactured to OEM specification for Land Rover's Rover V8 engine family\u003c\/li\u003e\n\u003cli\u003eAlways measure journal diameters with a micrometer before fitting to confirm standard size is appropriate; replace thrust washers and big-end bearings concurrently\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\n\u003cp\u003eFits Defender (1986–2006), Discovery 1 (1989–1998, to VIN TA501920), Discovery 2 (1998–2004), and Range Rover P38 (1995–2002), all with the V8 4.0 EFI engine.\u003c\/p\u003e\n\u003cp\u003eNot sure about fitment? Feel free to get in touch at \u003ca href=\"mailto:info@thomasperformance.co.uk\"\u003einfo@thomasperformance.co.uk\u003c\/a\u003e\u003c\/p\u003e","brand":"Allmakes 4x4","offers":[{"title":"Default Title","offer_id":55821820068184,"sku":"STC4299","price":19.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0890\/0070\/6392\/files\/STC4299-600x600.jpg?v=1758872024","url":"https:\/\/thomasperformance.co.uk\/products\/bearing-set-main-193891","provider":"Thomas Performance Ltd","version":"1.0","type":"link"}