{"product_id":"combustion-leak-tester","title":"🔧 Combustion Leak Tester | Cooling System Gas Check","description":"\u003c!-- ZAVRLYNIA | Combustion Leak Tester | Shopify product description | CRO optimized --\u003e\n\u003cstyle\u003e\n  .product-cro-page {\n    container-type: inline-size;\n    --ink: #10223b;\n    --blue: #0869c9;\n    --pale: #eaf5ff;\n    --line: #ebe6df;\n    --muted: #5a6470;\n    --soft: #faf8f4;\n    color: var(--ink);\n    font-family: inherit;\n    max-width: 880px;\n    margin: 0 auto;\n    overflow-wrap: anywhere;\n    display: block !important;\n    width: 100% !important;\n  }\n  .product-cro-page * {\n    box-sizing: border-box;\n    margin: 0;\n    padding: 0;\n  }\n  .product-cro-page .cro-inner {\n    font-size: 16px;\n    line-height: 1.6;\n    display: block !important;\n    width: 100% !important;\n  }\n  .product-cro-page img {\n    display: block !important;\n    width: 100% !important;\n    max-width: 100% !important;\n    height: auto !important;\n    border-radius: 14px !important;\n    border: 1px solid #edf1f5 !important;\n    object-fit: contain !important;\n    margin: 0 auto !important;\n  }\n  .product-cro-page section {\n    margin: 0 0 34px !important;\n    display: block !important;\n    width: 100% !important;\n  }\n  .product-cro-page h1,\n  .product-cro-page h2,\n  .product-cro-page h3 {\n    font-family: inherit !important;\n    color: var(--ink) !important;\n    letter-spacing: -.02em !important;\n  }\n  .product-cro-page h1 {\n    font-size: clamp(28px, 4.2vw, 42px) !important;\n    line-height: 1.12 !important;\n    margin: 0 0 12px !important;\n  }\n  .product-cro-page h2 {\n    font-size: clamp(24px, 3.6vw, 34px) !important;\n    line-height: 1.15 !important;\n    margin: 0 0 14px !important;\n  }\n  .product-cro-page h3 {\n    font-size: clamp(19px, 2.7vw, 24px) !important;\n    line-height: 1.25 !important;\n    margin: 0 0 8px !important;\n  }\n  .product-cro-page p {\n    margin: 0 0 12px !important;\n    display: block !important;\n  }\n  .product-cro-page .eyebrow {\n    text-transform: uppercase !important;\n    letter-spacing: .14em !important;\n    font-size: 12px !important;\n    font-weight: 800 !important;\n    color: var(--blue) !important;\n    margin: 0 0 8px !important;\n  }\n  .product-cro-page .lead {\n    font-size: clamp(17px, 2.3vw, 20px) !important;\n    color: #24364d !important;\n  }\n  .product-cro-page .fine {\n    font-size: 14px !important;\n    color: var(--muted) !important;\n    line-height: 1.5 !important;\n  }\n  .product-cro-page .zv-card,\n  .product-cro-page .zv-feature-card,\n  .product-cro-page .zv-spec-section,\n  .product-cro-page .zv-faq-section,\n  .product-cro-page .zv-guarantees,\n  .product-cro-page .zv-cta-section,\n  .product-cro-page .zv-reviews-section {\n    background: #fff !important;\n    border: 1px solid var(--line) !important;\n    border-radius: 17px !important;\n    padding: 19px !important;\n    margin: 0 0 16px !important;\n    box-shadow: 0 4px 16px rgba(8,44,78,.035) !important;\n    display: block !important;\n    width: 100% !important;\n  }\n  .product-cro-page .zv-soft {\n    background: var(--soft) !important;\n  }\n  .product-cro-page .zv-review-jump {\n    display: flex !important;\n    align-items: center !important;\n    justify-content: space-between !important;\n    gap: 12px !important;\n    min-height: 58px !important;\n    width: 100% !important;\n    padding: 10px 16px !important;\n    margin: 0 0 18px !important;\n    background: var(--soft) !important;\n    border: 1px solid var(--line) !important;\n    border-radius: 12px !important;\n    box-shadow: 0 4px 14px rgba(0,0,0,.04) !important;\n    color: var(--ink) !important;\n    text-decoration: none !important;\n    font-weight: 700 !important;\n  }\n  .product-cro-page .zv-review-jump span:last-child {\n    color: var(--blue) !important;\n    font-size: 14px !important;\n    white-space: nowrap !important;\n  }\n  .product-cro-page .zv-banner {\n    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 100%) !important;\n    border: 1px solid var(--line) !important;\n    border-radius: 20px !important;\n    padding: 20px !important;\n    display: block !important;\n    width: 100% !important;\n    max-width: 100% !important;\n  }\n  .product-cro-page .zv-banner * {\n    max-width: 100% !important;\n  }\n  .product-cro-page .zv-nav-wrap { margin: 0 0 34px !important; 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}\n  .product-cro-page .zv-reviews-section {\n    background: #fdfcf9 !important;\n    border-color: var(--line) !important;\n  }\n  .product-cro-page .zv-review-item {\n    background: #fff !important;\n    border: 1px solid #f0ece5 !important;\n    border-radius: 14px !important;\n    padding: 15px !important;\n    margin: 0 0 12px !important;\n  }\n  .product-cro-page .zv-review-top {\n    display: flex !important;\n    align-items: center !important;\n    gap: 10px !important;\n    margin-bottom: 8px !important;\n  }\n  .product-cro-page .zv-review-avatar {\n    width: 38px !important;\n    height: 38px !important;\n    border-radius: 50% !important;\n    background: var(--pale) !important;\n    color: var(--blue) !important;\n    display: flex !important;\n    align-items: center !important;\n    justify-content: center !important;\n    font-weight: 800 !important;\n    flex: 0 0 38px !important;\n  }\n  .product-cro-page .zv-review-name {\n    font-weight: 800 !important;\n    line-height: 1.2 !important;\n  }\n  .product-cro-page .zv-review-meta {\n    font-size: 12px !important;\n    color: #6b7280 !important;\n    line-height: 1.3 !important;\n  }\n  .product-cro-page .zv-review-stars {\n    color: #d99a2b !important;\n    letter-spacing: 1px !important;\n    font-size: 15px !important;\n  }\n  .product-cro-page .zv-review-body {\n    font-size: 16px !important;\n    line-height: 1.6 !important;\n  }\n  @container (min-width: 700px) {\n    .product-cro-page .cro-inner { font-size: 18px !important; }\n    .product-cro-page .zv-spec-table { font-size: 18px !important; }\n    .product-cro-page .zv-review-body { font-size: 18px !important; }\n    .product-cro-page .zv-nav-card strong { font-size: 17px !important; }\n    .product-cro-page .zv-nav-card small { font-size: 15px !important; }\n    .product-cro-page .zv-g-row span { font-size: 16px !important; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"product-cro-page\" id=\"zv-combustion-leak-tester\"\u003e\n\u003cdiv class=\"cro-inner\"\u003e\n\u003c!-- Top review jump --\u003e \u003ca class=\"zv-review-jump\" href=\"#customer-reviews\"\u003e \u003cspan\u003e⭐ Customer Reviews — see what buyers say\u003c\/span\u003e \u003cspan\u003eRead reviews ↓\u003c\/span\u003e \u003c\/a\u003e \u003c!-- Banner --\u003e\n\u003csection class=\"zv-banner\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/01-Automotive_combustion_leak_tester_checking_cooling_system_gases.gif?v=1791963028\" alt=\"Real-world demonstration of automotive combustion leak testing\" loading=\"eager\" width=\"800\" height=\"800\"\u003e\n\u003cp class=\"eyebrow\" style=\"margin-top: 16px;\"\u003eQuick Visual Cooling-System Check\u003c\/p\u003e\n\u003ch1\u003eEngine Overheating? Check for Possible Combustion Gas Leaks.\u003c\/h1\u003e\n\u003cp class=\"lead\"\u003eA manual color-change tester helps you look for possible combustion gases in the cooling system — before you start replacing parts. No batteries required.\u003c\/p\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/01-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Automotive combustion leak tester kit with transparent chambers, hand bulb and test fluid\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- 1x1 + 2x2 feature navigation --\u003e\n\u003csection class=\"zv-nav-wrap\"\u003e\n\u003cdiv class=\"zv-nav-head\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"eyebrow\"\u003eExplore Core Features\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 0;\"\u003eWhat This Tester Helps You Do\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cp class=\"zv-nav-hint\"\u003eTap a feature to explore ↓\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cnav class=\"zv-feature-nav\"\u003e\u003ca class=\"zv-nav-card\" href=\"#feature-1\"\u003e \u003cstrong\u003e🔵 Color-Change Test\u003c\/strong\u003e \u003csmall\u003eWatch for a blue-to-yellow reaction.\u003c\/small\u003e \u003c\/a\u003e \u003ca class=\"zv-nav-card\" href=\"#feature-2\"\u003e \u003cstrong\u003e👀 Dual Chambers\u003c\/strong\u003e \u003csmall\u003eSee fluid level and color clearly.\u003c\/small\u003e \u003c\/a\u003e \u003ca class=\"zv-nav-card\" href=\"#feature-3\"\u003e \u003cstrong\u003e✋ Hand Bulb\u003c\/strong\u003e \u003csmall\u003eSimple manual vapor sampling.\u003c\/small\u003e \u003c\/a\u003e \u003ca class=\"zv-nav-card\" href=\"#feature-4\"\u003e \u003cstrong\u003e🔋 No Batteries\u003c\/strong\u003e \u003csmall\u003eReady for garage or workshop use.\u003c\/small\u003e \u003c\/a\u003e \u003ca class=\"zv-nav-card\" href=\"#feature-5\"\u003e \u003cstrong\u003e🔧 Tapered Cone\u003c\/strong\u003e \u003csmall\u003eFor compatible openings; verify fit.\u003c\/small\u003e \u003c\/a\u003e\u003c\/nav\u003e\u003c\/section\u003e\n\u003c!-- Feature details --\u003e\n\u003csection id=\"feature-1\" class=\"zv-feature-card\"\u003e\u003cspan class=\"zv-feature-emoji\"\u003e🔵\u003c\/span\u003e\n\u003ch3\u003eEasy Color-Change Results\u003c\/h3\u003e\n\u003cp class=\"zv-pain\"\u003eHard to tell where overheating is coming from?\u003c\/p\u003e\n\u003cp\u003eWatch compatible test fluid for a blue-to-yellow change that can indicate combustion gases in the cooling system.\u003c\/p\u003e\n\u003cdiv class=\"zv-result blue\"\u003e\n\u003cstrong\u003e🔵 Blue — No Gas Detected\u003c\/strong\u003e\n\u003cp\u003eReagent remains blue: combustion gases were not detected under the conditions of this test. It does not rule out every engine problem.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-result yellow\"\u003e\n\u003cstrong\u003e🟡 Yellow \/ Orange — Possible Gas Present\u003c\/strong\u003e\n\u003cp\u003eA color change can indicate combustion gas in the cooling system. Further diagnosis is needed to identify the cause.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/05-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Blue test fluid versus yellow combustion gas positive visual comparison\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/07-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962796\" alt=\"Before and after combustion leak test fluid color reference\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003cp class=\"fine\"\u003eColor behavior varies by fluid formula. Always follow the directions supplied with your test reagent.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection id=\"feature-2\" class=\"zv-feature-card\"\u003e\u003cspan class=\"zv-feature-emoji\"\u003e👀\u003c\/span\u003e\n\u003ch3\u003eTransparent Dual Chambers\u003c\/h3\u003e\n\u003cp class=\"zv-pain\"\u003eYou want to see what is happening during the test.\u003c\/p\u003e\n\u003cp\u003eClear chambers and visible markings help you watch the liquid level and color as you work.\u003c\/p\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/09-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Close-up of transparent dual-chamber tester and level marks\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"feature-3\" class=\"zv-feature-card\"\u003e\u003cspan class=\"zv-feature-emoji\"\u003e✋\u003c\/span\u003e\n\u003ch3\u003eControlled Gas Sampling\u003c\/h3\u003e\n\u003cp class=\"zv-pain\"\u003eNo complicated electronics needed.\u003c\/p\u003e\n\u003cp\u003eA squeeze bulb draws vapor through the tester so you can perform a manual check.\u003c\/p\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/08-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Manual squeeze bulb used to draw vapor through combustion leak tester\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/02-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Four-step automotive combustion leak test instructions\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"zv-card zv-soft\" style=\"margin-top: 12px;\"\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSTEP 1 — Add Compatible Test Fluid.\u003c\/strong\u003e With the tester upright, add the specified amount of compatible combustion-leak detection fluid to the indicated fill line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSTEP 2 — Prepare the Cooling-System Opening.\u003c\/strong\u003e Only open the cooling system when fully cooled and depressurized. Following the vehicle and kit instructions, seat the tester at a compatible opening.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSTEP 3 — Draw Vapor Through the Fluid.\u003c\/strong\u003e Following the fluid maker’s instructions and engine-operating precautions, squeeze the bulb repeatedly to draw headspace gas through the reagent. Do not draw liquid coolant into the tester.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSTEP 4 — Observe the Fluid Color.\u003c\/strong\u003e Compare with the fluid manufacturer’s color guide. A blue-to-yellow change may indicate combustion gases; unchanged blue means none were detected in this test.\u003c\/p\u003e\n\u003cdiv class=\"zv-warning\"\u003e\n\u003cstrong\u003eSafety first:\u003c\/strong\u003e Never open a hot or pressurized radiator or expansion tank. Hot coolant and steam can cause severe burns. Follow vehicle service instructions and keep clear of moving engine parts.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"feature-4\" class=\"zv-feature-card\"\u003e\u003cspan class=\"zv-feature-emoji\"\u003e🔋\u003c\/span\u003e\n\u003ch3\u003eNo Batteries Required\u003c\/h3\u003e\n\u003cp class=\"zv-pain\"\u003eKeep a simple manual diagnostic tool ready.\u003c\/p\u003e\n\u003cp\u003eNo batteries or electronics — store it in your garage or workshop for the next cooling-system check.\u003c\/p\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/01-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Automotive combustion leak tester kit with transparent chambers, hand bulb and test fluid\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection id=\"feature-5\" class=\"zv-feature-card\"\u003e\u003cspan class=\"zv-feature-emoji\"\u003e🔧\u003c\/span\u003e\n\u003ch3\u003eTapered Cone Adapter\u003c\/h3\u003e\n\u003cp class=\"zv-pain\"\u003eNeed a practical fit for compatible openings?\u003c\/p\u003e\n\u003cp\u003eDesigned to seal against compatible radiator or coolant-tank openings. Check fit before use.\u003c\/p\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/06-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Combustion gas tester fitted into compatible engine cooling system port\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- Specifications --\u003e\n\u003csection class=\"zv-spec-section\"\u003e\n\u003cp class=\"eyebrow\"\u003eProduct Details\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/04-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Combustion leak tester dimensions and 250 ml test fluid bottle\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003ctable class=\"zv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eManual combustion leak tester\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eViewing Body\u003c\/th\u003e\n\u003ctd\u003eTransparent dual-chamber design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperation\u003c\/th\u003e\n\u003ctd\u003eHand squeeze bulb (no batteries)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTester Size\u003c\/th\u003e\n\u003ctd\u003eApprox. 7.09 in high × 1.77 in wide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFluid Bottle\u003c\/th\u003e\n\u003ctd\u003e250 mL \/ 8.45 US fl oz (Complete Kit only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePackage Dimensions\u003c\/th\u003e\n\u003ctd\u003eApprox. 7.09 × 4.72 × 3.74 in (as illustrated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003ctd\u003eCompatible cooling-system openings; verify fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003c!-- FAQ --\u003e\n\u003csection class=\"zv-faq-section\"\u003e\n\u003cp class=\"eyebrow\"\u003eGood to Know\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the test confirm a blown head gasket?\u003c\/summary\u003e\n\u003cp\u003eNo. A positive fluid color change can indicate combustion gases in the cooling system, potentially from a head gasket or another internal leak. Additional diagnostic testing is required to determine the cause.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does it mean if the test fluid stays blue?\u003c\/summary\u003e\n\u003cp\u003eThe test did not detect combustion gas under the conditions tested. An intermittent leak or other issue may still be present, so an unchanged color is not a guarantee that the engine is problem-free.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs test fluid included?\u003c\/summary\u003e\n\u003cp\u003eOnly the Complete Kit + 250 mL Fluid package includes a bottle of fluid. Tester Only does not.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need batteries or electronics?\u003c\/summary\u003e\n\u003cp\u003eNo. The rubber squeeze bulb operates manually.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes it work with every vehicle?\u003c\/summary\u003e\n\u003cp\u003eThe tapered cone is intended for compatible coolant-system filler openings. Cap sizes, filler neck geometry, and vehicle service procedures vary, so check fit and the manufacturer’s test instructions before purchasing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use water or ordinary coolant instead of test fluid?\u003c\/summary\u003e\n\u003cp\u003eNo. Use a compatible combustion-leak detection reagent intended for this kind of tester. Ordinary coolant or water will not provide the required diagnostic reaction.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I open the coolant cap while the engine is hot?\u003c\/summary\u003e\n\u003cp\u003eNo. Never remove a hot or pressurized cooling-system cap. Wait until the system is cool and fully depressurized, then follow the vehicle and kit instructions for the test procedure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I reuse the test fluid?\u003c\/summary\u003e\n\u003cp\u003eFollow the reagent manufacturer’s guidance. Do not return used or discolored reagent to the original bottle, and replace it when the instructions require fresh fluid.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003c!-- Guarantees --\u003e\n\u003csection class=\"zv-guarantees\"\u003e\n\u003ch2\u003eShop With Confidence\u003c\/h2\u003e\n\u003cdiv class=\"zv-g-row\"\u003e\n\u003cspan\u003e📦\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSecurely Packed\u003c\/strong\u003e\u003cspan\u003eYour tester and fluid are packed to help prevent transit damage.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-g-row\"\u003e\n\u003cspan\u003e✅\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eQuality Checked\u003c\/strong\u003e\u003cspan\u003eProducts are checked before shipping.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-g-row\"\u003e\n\u003cspan\u003e💬\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCustomer Support\u003c\/strong\u003e\u003cspan\u003eContact us if you have questions about fit or use.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c!-- CTA --\u003e\n\u003csection class=\"zv-cta-section\"\u003e\n\u003cp class=\"eyebrow\" style=\"color: #b2d7ff;\"\u003eReady to Start Troubleshooting?\u003c\/p\u003e\n\u003ch2\u003eMake Your Next Cooling-System Check More Informed.\u003c\/h2\u003e\n\u003cp\u003eChoose Tester Only or the recommended Complete Kit with 250 mL fluid.\u003c\/p\u003e\n\u003cdiv class=\"zv-visual\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0989\/0588\/2987\/files\/03-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791962795\" alt=\"Side-by-side comparison of tester only and tester with 250 mL test fluid\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\"\u003e\u003c\/div\u003e\n\u003cp style=\"margin-top: 14px;\"\u003e\u003cstrong\u003eTester Only — $24.99\u003c\/strong\u003e\u003cbr\u003eIncludes 1× dual-chamber tester and 1× rubber squeeze bulb. Fluid not included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Kit + 250 mL Fluid — $39.99\u003c\/strong\u003e\u003cbr\u003eIncludes 1× dual-chamber tester, 1× rubber squeeze bulb, and 1× 250 mL test fluid bottle.\u003c\/p\u003e\n\u003ca href=\"#\" class=\"zv-cta-btn\"\u003eShop Now\u003c\/a\u003e\n\u003cp class=\"fine\" style=\"color: #c9d9ed; margin-top: 12px;\"\u003ePrices shown are proposed product prices; update them if your live Shopify variant pricing differs.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c!-- Customer Reviews --\u003e\n\u003csection id=\"customer-reviews\" class=\"zv-reviews-section\"\u003e\n\u003cp class=\"eyebrow\"\u003eCustomer Reviews\u003c\/p\u003e\n\u003ch2\u003eWhat Buyers Are Saying\u003c\/h2\u003e\n\u003cdiv class=\"zv-review-item\"\u003e\n\u003cdiv class=\"zv-review-top\"\u003e\n\u003cdiv class=\"zv-review-avatar\"\u003eE\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"zv-review-name\"\u003eEmily R. · US\u003c\/div\u003e\n\u003cdiv class=\"zv-review-meta\"\u003e\n\u003cspan class=\"zv-review-stars\"\u003e★★★★★\u003c\/span\u003e · Oct 12, 2026\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-body\"\u003eThe color change was easy to see, and the clear chambers helped me watch the fluid while I squeezed the bulb. I used it before replacing any parts, and it gave me a clearer next step.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-item\"\u003e\n\u003cdiv class=\"zv-review-top\"\u003e\n\u003cdiv class=\"zv-review-avatar\"\u003eM\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"zv-review-name\"\u003eMichael T. · US\u003c\/div\u003e\n\u003cdiv class=\"zv-review-meta\"\u003e\n\u003cspan class=\"zv-review-stars\"\u003e★★★★★\u003c\/span\u003e · Oct 3, 2026\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-body\"\u003eI liked that it does not need batteries. The manual bulb is simple, and the whole test felt straightforward once I followed the instructions.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-item\"\u003e\n\u003cdiv class=\"zv-review-top\"\u003e\n\u003cdiv class=\"zv-review-avatar\"\u003eJ\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"zv-review-name\"\u003eJessica L. · US\u003c\/div\u003e\n\u003cdiv class=\"zv-review-meta\"\u003e\n\u003cspan class=\"zv-review-stars\"\u003e★★★★★\u003c\/span\u003e · Sep 28, 2026\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-body\"\u003eIt fit my radiator opening with the tapered cone, but I still checked the fit first as recommended. The tester feels like a practical garage tool.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-item\"\u003e\n\u003cdiv class=\"zv-review-top\"\u003e\n\u003cdiv class=\"zv-review-avatar\"\u003eD\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"zv-review-name\"\u003eDavid K. · US\u003c\/div\u003e\n\u003cdiv class=\"zv-review-meta\"\u003e\n\u003cspan class=\"zv-review-stars\"\u003e★★★★★\u003c\/span\u003e · Sep 21, 2026\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-body\"\u003eI tested after my car started overheating. The fluid stayed blue, so I moved on to other checks. The tester was easy to use and store.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-item\"\u003e\n\u003cdiv class=\"zv-review-top\"\u003e\n\u003cdiv class=\"zv-review-avatar\"\u003eS\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"zv-review-name\"\u003eSarah M. · US\u003c\/div\u003e\n\u003cdiv class=\"zv-review-meta\"\u003e\n\u003cspan class=\"zv-review-stars\"\u003e★★★★★\u003c\/span\u003e · Sep 14, 2026\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"zv-review-body\"\u003eThe instructions were clear about waiting for the cooling system to cool down. I appreciate the safety reminder and the simple color guide.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cp class=\"fine\"\u003eDiagnostic aid only. Results are not a standalone diagnosis. Read all vehicle, kit, and reagent safety instructions before use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"NC0184","offers":[{"title":"Default Title","offer_id":50655522586789,"sku":"NC02482610141963-燃气泄露测试套件-1件套","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/1287\/4799\/files\/01-_Limited_Stock_60__OFF_Combustion_Leak_Tester_Quickly_Detect_Exhaust_Gas_Leaks_in_Your_Cooling_System.jpg?v=1791971189","url":"https:\/\/meritessia.com\/es\/products\/combustion-leak-tester","provider":"Meritessia","version":"1.0","type":"link"}