OTC 5609 Cylinder Leakage Tester Kit Leak Down Rings Valves Head Gasket For Sale

🔧 Product Highlights

• QUICKLY DIAGNOSE INTERNAL ENGINE PROBLEMS – Identifies bad piston rings, worn valves, and leaking head gaskets – pinpoint the exact cause of compression loss
• DUAL 2-1/2\" GAUGES – EASY TO READ – Dual gauges with chrome bezels and rugged protective outer boots – calibrated 0-100 PSI and 0-700 kPa for precise readings
• PRESSURE REGULATED ALUMINUM MANIFOLD – Professional-grade manifold with quick couplers for easy connection – provides consistent, accurate air pressure to the cylinder
• COMPLETE ADAPTER SET INCLUDED – Includes 10mm, 12mm, 14mm, and 18mm thread adapters – plus a 24-inch 14mm flex hose for hard-to-reach spark plug holes
• BLOW MOLDED STORAGE CASE – Durable case with detailed operating instructions printed under the lid – keeps components organized and instructions always at hand
• LIFETIME WARRANTY – OTC QUALITY – Backed by OTC\'s lifetime warranty – professional-grade quality you can trust for a lifetime of engine diagnostics

🔧 Perfect For

• 🔧 Professional automotive repair shops and technicians
• 🏁 Engine builders and performance shops
• 🚗 DIY enthusiasts and advanced home mechanics
• 🔩 Classic car restoration and engine rebuild projects
• 📋 Pre-purchase vehicle inspections – check engine health
• 🛠️ Diagnosing mysterious engine problems (misfire, rough idle, power loss)

✅ What\'s Included – Complete Kit:
• Dual 2-1/2\" Gauges – 0-100 PSI / 0-700 kPa – Chrome bezels with protective boots
• Pressure Regulated Aluminum Manifold – With quick couplers
• 24\" 14mm Flex Hose – For tight access spark plug holes
• 10mm Thread Adapter – For small displacement engines
• 12mm Thread Adapter – For select Asian and European engines
• 14mm Thread Adapter – Most common spark plug thread size
• 18mm Thread Adapter – For large bore engines
• Blow Molded Storage Case – With operating instructions under lid ⚠️ IMPORTANT – PLEASE READ BEFORE PURCHASING • Air supply required: This tester requires 100 PSI shop air to pressurize the cylinder under test. An air compressor is NOT included.
• Gasoline engines only: Designed for use on gasoline engines – not for diesel engines.
• Compression test first: This is a diagnostic tool for after a compression test identifies a problem cylinder. Use a compression tester first to identify which cylinder needs testing.
• Professional use: For accurate results, follow the operating instructions included under the case lid.
• Lifetime warranty: This kit is backed by OTC\'s lifetime warranty – quality you can trust for a lifetime. 📏 Specifications BrandOTC Model Number5609 TypeCylinder Leakage / Leak Down Tester ApplicationGasoline Engines – Internal Engine Diagnostics Gauge TypeDual 2-1/2 Inch Gauges Pressure Range0-100 PSI / 0-700 kPa Gauge FeaturesChrome Bezels, Rugged Protective Outer Boots Manifold TypePressure Regulated Aluminum Manifold with Quick Couplers Required Air Supply100 PSI Shop Air (Air Compressor Not Included) Hose Length24 Inch 14mm Flex Hose Adapter Thread Sizes10mm, 12mm, 14mm, 18mm Special FeaturesQuick Couplers, Chrome Bezels, Protective Boots, Blow Molded Case, Operating Instructions Under Lid Case TypeBlow Molded Storage Case DiagnosesBad Piston Rings, Worn Valves, Leaking Head Gaskets Included ComponentsTester Unit, 24\" Flex Hose, 4 Adapters (10/12/14/18mm), Storage Case Item Weight1.79 lbs Item Dimensions (L x W x H)9.2\" x 10.25\" x 4.45\" WarrantyLifetime Warranty UPC / GTIN731413418549 ConditionNew 📝 Product Description

🔧 OTC 5609 Cylinder Leakage Tester – Professional Engine Diagnostics

⚠️ PLEASE CONFIRM: This tester requires 100 PSI shop air from an air compressor (not included). Designed for gasoline engines only.

The OTC 5609 Cylinder Leakage Tester Kit is the professional\'s choice for pinpointing internal engine problems. this leak-down tester quickly diagnoses bad piston rings, worn valves, and leaking head gaskets – saving time and money on engine repairs.

🔹 Pinpoint the Problem – Rings, Valves, or Head Gasket
Unlike a compression test that only tells you a cylinder is low, the cylinder leakage test pinpoints the exact cause. A leak-down test identifies whether the problem is piston rings, intake/exhaust valves, or a leaking head gasket – so you know exactly what needs repair before opening the engine.

🔹 Dual 2-1/2\" Gauges – Precise, Easy-to-Read
The kit features dual 2-1/2 inch gauges with chrome bezels and rugged protective outer boots. One gauge shows input pressure (0-100 PSI) and the other shows cylinder leakage percentage. The dual-scale design (0-100 PSI / 0-700 kPa) provides precise readings for accurate diagnostics.

🔹 Pressure Regulated Manifold – Consistent Results
The aluminum manifold with pressure regulator and quick couplers delivers consistent, accurate air pressure to the cylinder under test. This professional-grade manifold ensures reliable results every time – no guessing, no false readings.

🔹 Complete Adapter Set – One Kit Covers Most Engines
This kit includes 10mm, 12mm, 14mm, and 18mm thread adapters – covering most gasoline engines from small displacement to large bore. The 24-inch 14mm flex hose makes it easy to reach recessed spark plug holes in modern overhead cam engines. All components are organized in a durable blow molded storage case with operating instructions printed under the lid – so you always have the instructions when you need them.

🔹 How It Works – Quick Overview
Connect the tester to a 100 PSI shop air supply, thread the appropriate adapter into the spark plug hole, and introduce air into the cylinder. The gauge shows the percentage of air leaking past the rings, valves, or head gasket. Listen for air escaping – from the crankcase (rings), intake/exhaust (valves), or cooling system (head gasket) – to pinpoint the exact source of the problem.

🔹 Lifetime Warranty – OTC Quality
OTC stands behind the 5609 with a lifetime warranty – a testament to the quality and durability of this professional-grade tool. When you choose OTC, you\'re choosing a tool that will last a lifetime.

👥 Who Should Buy This?
This cylinder leakage tester is perfect for professional automotive technicians, engine builders, advanced DIY mechanics, and classic car restorers. If you diagnose engine problems, rebuild engines, or want to pinpoint the exact cause of compression loss before tearing into an engine, the OTC 5609 is the tool you need.

✅ Why Choose OTC 5609?
→ Pinpoints bad rings, worn valves, and leaking head gaskets
→ Dual 2-1/2\" gauges – 0-100 PSI / 0-700 kPa – precise readings
→ Pressure regulated aluminum manifold – consistent results
→ Includes 10mm, 12mm, 14mm, and 18mm adapters
→ 24\" 14mm flex hose – reaches recessed spark plug holes
→ Blow molded case with operating instructions under lid
→ Requires 100 PSI shop air – professional-grade diagnostics
→ Lifetime warranty – OTC quality you can trust for a lifetime 📦 What\'s Included

• ✔ OTC 5609 Cylinder Leakage Tester (Dual 2-1/2\" Gauges)
• ✔ Pressure Regulated Aluminum Manifold with Quick Couplers
• ✔ 24\" 14mm Flex Hose
• ✔ 10mm Thread Adapter
• ✔ 12mm Thread Adapter
• ✔ 14mm Thread Adapter
• ✔ 18mm Thread Adapter
• ✔ Blow Molded Storage Case with Operating Instructions Under Lid

❌ NOT Included – Must Purchase Separately
• Air Compressor – Requires 100 PSI shop air (not included)
• Air Hose – Shop air hose and fittings sold separately
• Vehicle – Vehicle for testing sold separately
• Compression Tester – Used to identify problem cylinders before leak-down testing (sold separately) 💡 Pro Tip: Use a compression tester first to identify problem cylinders, then use the leak-down tester to pinpoint the exact cause – rings, valves, or head gasket. This two-step approach saves time and money on engine repairs. 🔧 Usage & Testing Tips

• Step 1 – Prepare Engine: Warm up the engine to operating temperature. Remove all spark plugs from the cylinder(s) you plan to test.
• Step 2 – Identify Problem Cylinder: Perform a compression test first to identify which cylinder has low compression – this tells you which cylinder to leak test.
• Step 3 – Position Cylinder at TDC: Rotate the engine until the piston is at Top Dead Center (TDC) on the compression stroke for the cylinder being tested. This prevents the engine from turning under air pressure and ensures accurate results.
• Step 4 – Connect Tester: Thread the appropriate adapter into the spark plug hole. Connect the 24\" flex hose to the adapter and the manifold. Connect the manifold to your 100 PSI shop air supply.
• Step 5 – Read & Listen: Read the leakage percentage on the gauge. Listen for air escaping: crankcase = rings, intake = intake valve, exhaust = exhaust valve, cooling system = head gasket.

💡 Pro Tips – Getting the Most from Your Leak-Down Tester
• Listen for air: Open the oil fill cap and listen – air here means rings. Remove the air intake and exhaust – air here means valves. Open the radiator cap – bubbles mean head gasket
• TDC is critical: Always test with the piston at TDC on the compression stroke – otherwise, the engine may turn over and you\'ll get false readings
• Compare cylinders: Test all cylinders and compare readings – 5-10% leakage is acceptable, 10-20% indicates wear, over 20% indicates a problem
• Consistent air pressure: Always set the input pressure to 100 PSI before each test for consistent, repeatable results
• Safety: Always wear safety glasses – air pressure and debris can be dangerous
• Follow the instructions: Detailed operating instructions are printed under the case lid – refer to them for step-by-step guidance 📞 After-Sales Service

• ✅ Fast Shipping – Dispatched within 3 business days from US warehouse
• ✅ 30-Day Returns – Free & easy returns via Money Back Guarantee
• ✅ 100% Genuine – Authentic OTC product with original packaging
• ✅ 24/7 Support – Reply within 24 hours – any issues? Contact us FIRST, we will do our best to resolve
• ✅ Lifetime Warranty – Covered by OTC – contact us for claim assistance

🔒 Dual Gauge Leak-Down Tester – Lifetime Warranty . Disclaimer: \"OTC\" is a registered trademark. This listing is for the OTC 5609 Cylinder Leakage Tester Kit. This product is an authentic OTC product. We are an independent seller and not affiliated with OTC. IMPORTANT: This leak-down tester requires 100 PSI shop air from an air compressor (not included). Designed for gasoline engines only. For accurate results, perform a compression test first to identify problem cylinders, then use the leak-down tester to pinpoint the cause. All warranties are subject to manufacturer\'s terms. California Prop 65 warning: This product may contain chemicals known to the State of California to cause cancer or reproductive harm.