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Block Tester BT-500 Combustion Leak Test Kit – Head Gasket CO2 Tester | Free Fast AU Shipping
Professional combustion leak test kit designed to quickly detect head gasket and engine cooling system leaks.
🚗 Engine Diagnostic Tool
🧪 CO₂ Combustion Leak Test
⚙️ Manual Hand-Operated
🔍 Fast Colour-Change Result
🛠️ Workshop & DIY Use
$119.99
SAVE $25.00
$94.99
🔒 Secure checkout · 🇦🇺 AU stock · Brand new & sealed
🚗 Limited stock — essential diagnostic tool for head gasket & engine checks
Quantity
🇦🇺 Australian Owned Business
📍 Ships from Victoria, Australia
⭐ Trusted by Professionals & Home Users
🔁 90-Day Money-Back Guarantee
🚚 Free Shipping Australia-Wide
⏱ Dispatch in 24–48 Hours
🚚 Free Shipping Australia-Wide
Fast local delivery from AU stock
Limited-time offer on engine diagnostic tools
✔ Ideal for Automotive Diagnostics, Head Gasket Testing, Engine Cooling System Checks, Workshops, Mechanics & DIY Car Maintenance
Couldn't load pickup availability
✔ 90-Day Money-Back Guarantee • ✔ Australian Support • ✔ Secure Checkout
❌ Guessing engine issues can lead to unnecessary repairs, wasted time & high costs
✅ This combustion leak tester gives a fast, visual confirmation of head gasket and cooling system problems — so you diagnose accurately before damage worsens
✅ This combustion leak tester gives a fast, visual confirmation of head gasket and cooling system problems — so you diagnose accurately before damage worsens
Block Tester BT-500 – Combustion Leak Test Kit

Professional diagnostic tool used to detect combustion gases in the cooling system — ideal for identifying blown head gaskets, cracked heads or block leaks.
The Block Tester allows you to quickly and accurately test for CO₂ exhaust gases present in your radiator or expansion tank. A colour change in the test fluid clearly indicates a combustion leak.
Key Features
- Detects combustion leaks in cooling systems
- Helps diagnose blown head gaskets early
- Simple hand-operated bulb design
- Clear colour-change test result
- Reusable tester body
- Suitable for petrol engines
How It Works
- Warm engine and remove radiator cap (when safe)
- Insert tester into radiator or expansion tank
- Squeeze bulb to draw vapour through test fluid
- Fluid changes colour if combustion gases are present
Applications
- Head gasket leak detection
- Cooling system diagnostics
- Automotive workshops & mechanics
- DIY vehicle maintenance
- Used car inspections
Product Specifications
- Model: BT-500
- Type: Combustion Leak Tester
- Colour: Black
- Weight: Approx. 454g
- Power Source: Manual (no batteries required)
- Condition: Brand New
Package Includes
- 1 × Block Tester Tool
- 1 × Bottle of Test Fluid
❌ Guessing engine problems can lead to costly repairs
✅ This block tester gives a fast, visual confirmation of combustion leaks before major damage occurs
✅ This block tester gives a fast, visual confirmation of combustion leaks before major damage occurs
🔒 Secure checkout · 🇦🇺 AU stock · 🚚 Free & fast Australia-wide delivery
Mark H. — Parramatta, NSW
★★★★★
Used it to confirm a suspected head gasket issue. Clear colour change and easy to use.
✔ Verified Purchase
Jason K. — Dandenong, VIC
★★★★☆
Solid build and accurate results. Saved me from tearing the engine down unnecessarily.
✔ Verified Purchase
Luke R. — Toowoomba, QLD
★★★★★
Great diagnostic tool for the price. Works exactly as described.
✔ Verified Purchase
Andrew M. — Rockingham, WA
★★★★☆
Simple hand operation and quick results. Handy to have in the workshop.
✔ Verified Purchase
Paul S. — Wagga Wagga, NSW
★★★★★
Helped diagnose a cooling system problem fast. Clear instructions and reliable test.
✔ Verified Purchase
Chris D. — Launceston, TAS
★★★★☆
Good quality tester. Colour change is easy to see and results are consistent.
✔ Verified Purchase
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