--- product_id: 466658435 title: "Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool" brand: "kweiny" price: "€ 31.19" currency: EUR in_stock: true reviews_count: 5 category: "Kweiny" url: https://www.desertcart.sk/products/466658435-diesel-common-rail-14mm-fuel-injector-cap-block-off-tool store_origin: SK region: Slovakia --- # M14x1.5mm precision fit Fits 2001-2007 Duramax & Cummins Carbon tool steel durability Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool **Brand:** kweiny **Price:** € 31.19 **Availability:** βœ… In Stock ## Summary > πŸ”© Diagnose Like a Diesel Pro β€” Don’t Let Faulty Injectors Slow You Down! ## Quick Answers - **What is this?** Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool by kweiny - **How much does it cost?** € 31.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/466658435-diesel-common-rail-14mm-fuel-injector-cap-block-off-tool) ## Best For - kweiny enthusiasts ## Why This Product - Trusted kweiny brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Rugged Carbon Steel Build:** Crafted from galvanized carbon tool steel to resist rust and withstand tough workshop conditions. - β€’ **Instant Cylinder Isolation:** Block fuel supply to individual cylinders to quickly identify engine knocking and injector failures. - β€’ **Precision Engine Diagnosis:** Pinpoint faulty injectors with exact M14x1.5mm compatibility for Bosch diesel common rail systems. - β€’ **Broad Vehicle Compatibility:** Seamlessly fits 6.6L Chevy/GMC Duramax (2001-2005) and 5.9L Dodge/Cummins (2003-2007) trucks. - β€’ **Essential Pro Mechanic Tool:** A must-have for diesel pros aiming to diagnose and fix injector issues without expensive scanner limitations. ## Overview The Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool is a precision-engineered diagnostic device designed to isolate and identify faulty diesel injectors in popular 6.6L Chevy/GMC Duramax and 5.9L Dodge/Cummins trucks (2001-2007). Made from durable galvanized carbon tool steel, it blocks fuel supply to individual cylinders, enabling quick detection of engine knocking and injector malfunctions without relying solely on scanners. This tool is essential for professional mechanics and diesel enthusiasts seeking efficient, reliable injector diagnostics. ## Description Operation principle: When the pressure of the common rail is too low to start the engine. One of the possible reasons is a defective diesel fuel injector returning excess fuel back to the tank. To identify the individual defective cylinder. You can remove the diesel fuel injection line from the cylinder, and use this block off tool instead of diesel fuel injection line to seal common rail pipe. If the engine can be started normally, and the common rail pressure return to normal value. It prove that the injector of this cylinder is malfunction.If your scanner cannot perform certain tests. This diesel injector block off tool can also be used for diagnosing engine knocking sounds that could possibly be caused by a single cylinder issue.In some situations, You may need several block off tools to test several injectors at the same time.Compatibility: 2001-2005 6.6L Chevy GMC Duramax and for Dodge/Cummins 2003-2007 5.9L, for Bosch diesel common rail system, and other vehicles with a 14mm fuel line nut;Package include: 1 x Block Off ToolSpecification: M14 x 1.5mmMaterial:Carbon tool steel, surface antirust. Review: Fits excellent! - Excellent Review: Cumple su objetivo - Si me agrado. Y pude eliminar el inyector y saber que cilindro estΓ‘ malo ## Features - Main Usage: Identification of faulty diesel fuel injectors and diagnosis of engine cylinder knocking sounds; - Compatibility: Fit with 2001-2005 6.6L Chevy/GMC Duramax and for Dodge/Cummins 2003-2007 5.9L, for Bosch diesel common rail system, and other vehicles with a 14mm fuel line nut; - Working principle: Block the fuel supply to the detected cylinder, and sealed diesel common rail pipe. Make the detected cylinder temporarily stop working; - Specification: M14x1.5mm internal thread nut; - Material: Carbon tool steel, surface galvanized. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B081NGCSVW | | Brand | kweiny | | Brand Name | kweiny | | Closure Type | Twist-On | | Colour | Galvanized | | Compatible with Vehicle Type | Truck | | Customer Reviews | 4.7 out of 5 stars 187 Reviews | | Exterior Finish | Galvanized | | Item Dimensions | 20 x 20 x 23 Millimeters | | Item dimensions L x W x H | 20 x 20 x 23 Millimeters | | Manufacturer | Xingzhu | | Manufacturer Part Number | XZAMBS001 | | Material | Carbon Tool Steel | | Material Type | Carbon Tool Steel | | Model | oz | | Style Name | Modern | | Unit Count | 1.0 Count | | Vehicle Service Type | Truck | ## Product Details - **Brand:** kweiny - **Colour:** Galvanized - **Exterior Finish:** Galvanized - **Item dimensions L x W x H:** 20 x 20 x 23 Millimeters - **Material:** Carbon Tool Steel ## Images ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 1](https://m.media-amazon.com/images/I/61qxRMNns3L.jpg) ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 2](https://m.media-amazon.com/images/I/61UqTmmKq8L.jpg) ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 3](https://m.media-amazon.com/images/I/61K4pzxrAGL.jpg) ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 4](https://m.media-amazon.com/images/I/61NIS10p3WL.jpg) ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 5](https://m.media-amazon.com/images/I/51AsRXnIwmL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fits excellent! *by M***N on 3 December 2023* Excellent ### ⭐⭐⭐⭐⭐ Cumple su objetivo *by A***Z on 11 March 2024* Si me agrado. Y pude eliminar el inyector y saber que cilindro estΓ‘ malo ### ⭐⭐⭐⭐⭐ Very handy tool. *by R***N on 30 October 2023* Very handy tool for diagnosing injector issues. Fast delivery. Thank you. ## Frequently Bought Together - kweiny Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - 6 Cylinder Diesel Injector Flow Meter Diagnostic Set, Cylinder Common Rail Adaptor Test Tool Leak Off Test Kit --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/466658435-diesel-common-rail-14mm-fuel-injector-cap-block-off-tool](https://www.desertcart.sk/products/466658435-diesel-common-rail-14mm-fuel-injector-cap-block-off-tool) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-06-21*