{"product_id":"2-5-d-piston-ring-020","title":"2.5D Piston Ring 020 for Defender (1986 – 2006) Plus 020 – RTC477820","description":"\u003cp\u003eThis is a standard-bore oversize piston ring set, ground to 020 thou (0.020 inch) oversize, designed for the Land Rover 2.5D naturally aspirated diesel engine as used in the Defender. Piston rings seal combustion gases, control oil consumption, and transfer heat from the piston to the cylinder wall; worn or broken rings cause blue smoke, excessive oil consumption, and loss of compression. Correct oversize specification is critical - fitting the wrong size results in improper ring-to-bore clearance and premature engine failure.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e020 thou (0.50mm) oversize ground rings, matched to a cylinder bore rebored to 020 oversize\u003c\/li\u003e\n\u003cli\u003eDesigned for the Land Rover 2.5D naturally aspirated diesel engine (19J)\u003c\/li\u003e\n\u003cli\u003eSupplied to OEM replacement specification under part number RTC4778\u003c\/li\u003e\n\u003cli\u003eVerify bore size with a micrometer before ordering; replace all rings per cylinder as a complete set and inspect bearing shells simultaneously\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\n\u003cp\u003eFits Land Rover Defender with the 2.5 Naturally Aspirated Diesel engine, from 1986 to 2006, where the cylinder bore has been machined to 020 thou oversize.\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":55821775438168,"sku":"RTC477820","price":11.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0890\/0070\/6392\/files\/RTC477820-600x600.jpg?v=1758871444","url":"https:\/\/thomasperformance.co.uk\/products\/2-5-d-piston-ring-020","provider":"Thomas Performance Ltd","version":"1.0","type":"link"}