--- product_id: 176580041 title: "New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set" brand: "ondy" price: "β‚Ή 2095" currency: INR in_stock: true url: https://www.desertcart.in/products/176580041-new-leak-down-tester-tu-21-engine-cylinder-leak-tester store_origin: IN region: India --- # Fits 10-14mm spark plugs Measures 0-100% cylinder leakage 0-140 PSI pressure range New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set **Brand:** ondy **Price:** β‚Ή 2095 **Availability:** βœ… In Stock ## Summary > πŸ”§ Diagnose like a pro, fix like a boss – don’t let engine leaks slow your hustle! ## Quick Answers - **What is this?** New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set by ondy - **How much does it cost?** β‚Ή 2095 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/176580041-new-leak-down-tester-tu-21-engine-cylinder-leak-tester) ## Best For - ondy enthusiasts ## Why This Product - Trusted ondy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Compact & Durable Design:** Carbon steel build with compact dimensions fits tight engine bays, perfect for late-model cars and trucks. - β€’ **Precision Pressure Gauges:** Dual gauges provide real-time input and leakage pressure readings up to 140 PSI for pinpoint diagnostics. - β€’ **DIY Mechanic’s Best Friend:** Easy setup with quick-connect couplers and clear leakage percentage readings to empower confident engine maintenance. - β€’ **Comprehensive Fault Detection:** Detects worn piston rings, cracked cylinder walls, blown head gaskets, and valve leaks with surgical accuracy. - β€’ **Universal Spark Plug Compatibility:** Works seamlessly with 10, 12, and 14mm spark plugs across most petrol engines. ## Overview The ONDY TU-21 Leak Down Tester is a precision diagnostic tool designed for professional-grade engine cylinder leak detection. Compatible with 10-14mm spark plugs and operating at 0-140 PSI, it accurately measures cylinder leakage from 0-100%, enabling detection of piston ring wear, valve leaks, cracks, and head gasket failures. Featuring dual pressure gauges and quick-connect fittings, this compact carbon steel set is ideal for DIY mechanics and professionals aiming to maintain peak engine performance and avoid costly repairs. ## Description desertcart.com: New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set : Automotive ## Features - FITS YOUR VEHICLE -- It is compatible with gasoline 4-stroke engines and 12mm or 14mm spark. As long your vehicle has a standard spark plug socket, this set will work for you. - COMPARE CYLINDERS -- It best tests cylinder leak down and compression when comparing a suspect cylinder to a known good cylinder on the same engine. - EASY TO USE -- Remove the Schrader valve and turn the regulator off before applying shop air. Install the hose to the cylinder, the unit to an air supply, calibrate the leak gauge, and connect the unit to the cylinder hose. Diagnosis is made by observing the amount of leakage indicated on the cylinder leakage gauge and listening for leakage at various points of the car system. - Designed to detect a variety of common engine faults. including: Worn piston rings, worn valves, cracks in cylinder walls and blown head gaskets. - Suitable for use on any petrol engine with 10, 12 or 14mm spark plugs. Tester checks the amount of leakage in an engine cylinder & helps determine the source. Ideal for testing trucks & late model cars where clearance is minimal. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08225M7VC | | Best Sellers Rank | #1,140,937 in Automotive ( See Top 100 in Automotive ) #7,631 in Diagnostic, Test & Measurement Tools | | Brand Name | ONDY | | Customer Reviews | 4.2 4.2 out of 5 stars (450) | | Item Dimensions | 11.81 x 11.81 x 1.97 inches | | Manufacturer | ONDY | | Material Type | Carbon steel | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 29-0629 | | Thread Style | Npt | | UPC | 016071508109 | | Unit Count | 1 Count | ## Product Details - **Brand:** ONDY - **Item dimensions L x W x H:** 11.81 x 11.81 x 1.97 inches - **Material:** Carbon steel - **Number of Items:** 1 - **Thread Type:** Npt ## Images ![New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set - Image 1](https://m.media-amazon.com/images/I/51gMD7g8IGL.jpg) ![New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set - Image 2](https://m.media-amazon.com/images/I/51UzCVKuTxL.jpg) ![New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set - Image 3](https://m.media-amazon.com/images/I/51CR+XUW-5L.jpg) ![New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set - Image 4](https://m.media-amazon.com/images/I/41khZBz-e-L.jpg) ![New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set - Image 5](https://m.media-amazon.com/images/I/41ewQLmU84L.jpg) ## Questions & Answers **Q: This says for compression and leak test. compression testing requires a gauge to at least 180 psi but gauge shown is far less. is picture wrong?** A: I would not use a leak down tester as a compression tester. A leak down test is very specific and gives complementary data to a compression test. If you want to do a compression test get the proper tool. When testing an engine of unknown quality I always do both tests since the testers are not expensive. **Q: Where is this made?** A: China **Q: Can anyone tell me if the attachments will fit down the spark plug well of bmw r1200 gs motorcycles, 2010-2012?** A: Suitable for use on any petrol engine with 10, 12 or 14mm spark plugs. **Q: Will this work on a jeep 4.0l? (2000 grand cherokee wj)** A: Suitable for use on any petrol engine with 10, 12 or 14mm spark plugs. Tester checks the amount of leakage in an engine cylinder & helps determine the source. Ideal for testing trucks & late model cars where clearance is minimal. ## Frequently Bought Together - New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set - BETOOLL HW0130 8pcs Petrol Engine Cylinder Compression Tester Kit Automotive Tool Gauge --- ## 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.in/products/176580041-new-leak-down-tester-tu-21-engine-cylinder-leak-tester](https://www.desertcart.in/products/176580041-new-leak-down-tester-tu-21-engine-cylinder-leak-tester) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-10-17*