{"product_id":"dayuan-petrol-engine-compression-tester-kit-red-case-3-dual-scale-gauge-multi-adapters","title":"DAYUAN Petrol Engine Compression Tester Kit - Red Case, 3\" Dual-Scale Gauge \u0026 Multi-Adapters","description":"\u003cp\u003e\u003cstrong\u003eThe DAYUAN Professional Petrol Engine Compression Tester Kit is a complete portable set for checking petrol engine cylinder compression quickly and accurately.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact kit comes in a durable red case and includes a 3-inch dual-scale gauge, multiple thread fittings and spark plug adapters, plus two rubber cone ends for non-invasive checks. Designed for mechanics, home DIYers and fleet technicians, the set covers a broad range of petrol engines and spark plug depths so you can diagnose cylinder sealing, valve condition and overall engine health without disassembly.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and spark plugs will this kit work with?\u003c\/h3\u003e\n\n\u003cp\u003eThe DAYUAN kit supports most common petrol engines by providing several threaded fittings and spark plug adapters to match different sizes and depths. It’s ready for vehicles with M10, M12, M14 and M18 spark plug threads and includes both 14mm and 18mm adapters for popular plug types.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eM10, M12, M14, M18 male fittings with O-rings for reliable sealing\u003c\/li\u003e\n  \u003cli\u003e14mm and 18mm spark plug adapters to fit most cars and small engines\u003c\/li\u003e\n  \u003cli\u003eTwo rubber cone ends for quick, non-threaded compression checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow accurate and easy-to-read is the gauge?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit’s 3-inch gauge displays readings in both 0–300 psi and 0–20 bar for straightforward interpretation and compatibility with different measurement preferences. Its dual-color scale highlights common operating ranges so you can spot weak cylinders at a glance during diagnostics.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e3\" analog gauge with dual psi and bar scales\u003c\/li\u003e\n  \u003cli\u003eDual-color marking for quick visual assessment\u003c\/li\u003e\n  \u003cli\u003eRobust needle and clear face for workshop conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat accessories are included, and how do they speed up testing?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit bundles a range of adapters and fittings inside a protective case so you have everything on hand when troubleshooting. The rubber cone ends let you perform a rapid leak-down style check without threading into the head, saving time on initial inspections.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRed hard case organising gauge, hoses and fittings for transport\u003c\/li\u003e\n  \u003cli\u003eHoses and quick-connect fittings for repeatable tests\u003c\/li\u003e\n  \u003cli\u003eTwo rubber cone ends for fast, temporary compression checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I use the DAYUAN tester safely and effectively?\u003c\/h3\u003e\n\n\u003cp\u003eAlways follow basic engine test procedures: disable ignition, remove all spark plugs, crank the engine consistently and compare readings across cylinders. Use the included adapters that match your spark plug threads, and seal connections with the provided O-rings to prevent false low readings.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDisable ignition and fuel systems before testing\u003c\/li\u003e\n  \u003cli\u003eRemove spark plugs and install the correct adapter for each cylinder\u003c\/li\u003e\n  \u003cli\u003eCrank engine with starter for consistent measurements and compare cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The DAYUAN Professional Petrol Engine Compression Tester Kit is aimed at automotive technicians, small-engine repairers, vehicle inspectors and hands-on DIYers who need a portable, full-featured compression testing solution. If you service multiple vehicle makes or frequently diagnose petrol engine issues, this kit gives you a versatile gauge, multiple fittings and practical quick-check cones in a compact, transportable case so you can get reliable readings at the shop or roadside.\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: Can this tester measure both psi and bar?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 3\" gauge shows dual scales: 0–300 psi and 0–20 bar for easy interpretation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need adapters for different spark plug sizes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes M10, M12, M14, M18 fittings plus 14mm and 18mm plug adapters and O-rings.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DAYUAN","offers":[{"title":"Default Title","offer_id":48087026761886,"sku":"B07BKWPPDR","price":30.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dayuan-red-case-front-closed_0bb96032-8300-4274-b84a-ba01b885b44d.jpg?v=1785914577","url":"https:\/\/northtrailauto.ca\/products\/dayuan-petrol-engine-compression-tester-kit-red-case-3-dual-scale-gauge-multi-adapters","provider":"North Trail Auto","version":"1.0","type":"link"}