{"product_id":"lnkvorx-diesel-common-rail-block-off-cap-set-12-20mm-5-piece-fits-cummins-duramax-ford-engines","title":"Lnkvorx Diesel Common Rail Block-off Cap Set 12–20mm | 5-Piece Fits Cummins, Duramax, Ford Engines","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Lnkvorx Diesel Common Rail Block-off Cap Set offers a compact, purpose-built solution for diesel injector diagnostics. This five-piece kit provides cap sizes from 12mm to 20mm, each designed to seal the fuel rail and safely isolate individual cylinders during testing. Crafted for durability, the caps are constructed from robust carbon steel and feature precise internal threading to ensure a snug, leak-free fit. The set supports a workflow that aims to verify injector behavior through controlled fuel flow, without implying guaranteed results.\u003c\/p\u003e\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFive block-off caps in nominal diameters: 12mm, 14mm, 16mm, 18mm, and 20mm. Internal threads are 1.5 pitch, matching standard fuel rail nuts.\u003c\/li\u003e\n\u003cli\u003eEach piece is designed to seal the fuel rail and block supply to a given cylinder during testing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility and use cases\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e12mm cap: Ford 6.4L (2008–2010).\u003c\/li\u003e\n\u003cli\u003e14mm cap: Ford 6.7L (2011–2022), Cummins 5.9L (2003–2009), Duramax 6.6L (2001–2005, 2017–2022).\u003c\/li\u003e\n\u003cli\u003e16mm cap: Cummins 6.7L (2019–2022).\u003c\/li\u003e\n\u003cli\u003e18mm cap: Duramax 6.6L (2011–2016).\u003c\/li\u003e\n\u003cli\u003e20mm cap: Cummins 6.7L (2007–2018) and Duramax 6.6L (2006–2010).\u003c\/li\u003e\n\u003cli\u003eAlso compatible with other engines that use similar rail hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance and construction\u003c\/h3\u003e\n\u003cp\u003eMade from full carbon steel for durability, the caps are designed for repeated use in a workshop environment. The tool helps identify injector-related issues by safely isolating cylinders and allowing you to observe fuel pressure changes or engine response when a single port is blocked. The design focuses on clean engagement with the existing fuel rail nuts to minimize risk during testing.\u003c\/p\u003e\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eShut down the engine and relieve fuel pressure according to your workshop procedure.\u003c\/li\u003e\n\u003cli\u003eDetach the fuel line from one cylinder at a time and thread the matching cap onto the rail.\u003c\/li\u003e\n\u003cli\u003eRepeat for additional cylinders as needed to compare responses and locate potential faults.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eWhile the set provides practical diagnostic options, it is not a substitute for comprehensive fault analysis or professional training. Use with appropriate safety measures and PPE.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the Lnkvorx Diesel Common Rail Block-off Cap Set used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A five-piece tool set to seal the fuel rail and isolate cylinders for diagnostic testing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which engines are compatible with this cap set?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Fits multiple diesel engines with 12–20 mm rail nuts, including Ford, Cummins, and Duramax models.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Lnkvorx","offers":[{"title":"Default Title","offer_id":42468733517909,"sku":"B0DLWW2LQF","price":41.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/lnkvorx-diesel-common-rail-block-off-cap-12mm.jpg?v=1778079974","url":"https:\/\/plentytorque.co.uk\/products\/lnkvorx-diesel-common-rail-block-off-cap-set-12-20mm-5-piece-fits-cummins-duramax-ford-engines","provider":"PlentyTorque","version":"1.0","type":"link"}