--- product_id: 466658435 title: "Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool" brand: "kweiny" price: "101 kr" currency: ISK in_stock: false category: "Kweiny" url: https://www.desertcart.is/products/466658435-diesel-common-rail-14mm-fuel-injector-cap-block-off-tool store_origin: IS region: Iceland --- # 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:** 101 kr **Availability:** ❌ Out of Stock ## Summary > 🔩 Diagnose like a pro, drive with confidence! ## Quick Answers - **What is this?** Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool by kweiny - **How much does it cost?** 101 kr with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/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 - • **Rugged Durability:** Crafted from galvanized carbon tool steel to resist rust and withstand tough workshop conditions. - • **Broad Compatibility:** Seamlessly works with 6.6L Chevy/GMC Duramax (2001-2005) and 5.9L Dodge/Cummins (2003-2007) Bosch common rail systems. - • **Knock Out Engine Noise:** Quickly identify and isolate cylinders causing knocking sounds without expensive diagnostics. - • **Plug & Play Simplicity:** Easy twist-on installation lets you test multiple injectors efficiently, saving time and money. - • **Precision Engine Diagnosis:** Pinpoint faulty injectors with exact M14x1.5mm fit for reliable cylinder isolation. ## Overview The Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool is a precision-engineered, galvanized carbon steel tool designed to isolate faulty diesel injectors by blocking fuel supply to individual cylinders. Compatible with popular 6.6L Chevy/GMC Duramax and 5.9L Dodge/Cummins engines from 2001-2007, it enables quick, reliable diagnosis of injector issues and engine knocking, streamlining maintenance for diesel professionals and enthusiasts alike. ## 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. ## 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 | | Automotive Fit Type | Vehicle Specific Fit | | Brand Name | kweiny | | Closure Type | Twist-On | | Colour | Galvanized | | Compatible with Vehicle Type | Truck | | Country of Origin | USA | | Customer Reviews | 4.7 4.7 out of 5 stars (188) | | Exterior Finish | Galvanized | | Item Dimensions | 20 x 20 x 23 Millimeters | | Item Highlight | Block Off Tool for Chevy GMC Duramax 6.6L & Dodge Cummins 5.9L Some Models | | Manufacturer | Xingzhu | | Manufacturer Part Number | XZAMBS001 | | Material Type | Alloy Steel | | Model | oz | | Number of Items | 1 | | Number of Packs | 1 | | Style Name | Auto Part | | Unit Count | 1.0 Count | ## Product Details - **Brand:** kweiny - **Colour:** Galvanized - **Exterior Finish:** Galvanized - **Item dimensions L x W x H:** 20 x 20 x 23 Millimeters - **Material:** Alloy Steel ## Images ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 1](https://m.media-amazon.com/images/I/41xxuKelvoL.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/51YvMj3iVmL.jpg) ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 4](https://m.media-amazon.com/images/I/41-NspXVubL.jpg) ![Diesel Common Rail 14mm Fuel Injector Cap Block Off Tool - Image 5](https://m.media-amazon.com/images/I/41I1rXihXiL.jpg) ## 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/466658435-diesel-common-rail-14mm-fuel-injector-cap-block-off-tool](https://www.desertcart.is/products/466658435-diesel-common-rail-14mm-fuel-injector-cap-block-off-tool) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-11-13*