🚗🧪 Combustion Leak Tester — Quickly Detect Exhaust Gas Leaks in Your Cooling System!
🚗🧪 Combustion Leak Tester — Quickly Detect Exhaust Gas Leaks in Your Cooling System!
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🚗🧪 Combustion Leak Tester — Quickly Detect Exhaust Gas Leaks in Your Cooling System!
Check for Combustion Gas in Your Cooling System
Sample cooling-system vapor with a handheld tester and use the fluid’s color to guide your next diagnostic step.

When Coolant Loss Needs a Closer Look
Made for home garages and automotive service work, this tester helps you investigate one possible cause of unexplained cooling-system trouble.
Start with what the cooling-system vapor can tell you.
From Setup to Reading
Follow your vehicle and tester instructions. Wait until the cooling system is cool and depressurized before removing its cap.

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STEP 1💧
Fill to the Mark
Add compatible combustion-leak test fluid to the indicated level.
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STEP 2🚗
Seat the Tester
Position the tapered cone at the appropriate compatible radiator or reservoir opening.
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STEP 3💨
Draw a Vapor Sample
Squeeze the bulb repeatedly to pull vapor through the chamber. Keep liquid coolant out of the test fluid.
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STEP 4👀
Watch the Fluid
Compare the fluid’s color during sampling with its starting blue reference.
A Clear View of the Sample
The transparent body lets you follow the bubbles and watch the fluid as you sample.

Lower Splash Buffer
The lower chamber helps intercept coolant splash before it reaches the test fluid above.
Upper Test Chamber
The upper chamber holds the indicator fluid where you can see its color during the check.
Built-In LEVEL Marks
The markings show where to stop when filling the chamber.
Rubber Squeeze Bulb
The included bulb lets you draw the sample by hand.
Where a Vapor Check Fits
Use the tester when a combustion-gas check would help narrow the next step.

Trace Unexplained Coolant Loss
If the level keeps dropping and you see no puddle, check the vapor for a possible clue.
Prioritize a Sealing Inspection
If the fluid changes color, use that finding to decide whether to investigate engine sealing further.
Add to a Used-Car Inspection
Where access and fit allow, include the vapor check alongside the rest of your vehicle inspection.
Compact, Manual, and Easy to Observe
The tester combines a handheld body, a tapered connection, and a fluid you can read directly.

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Handheld Size
The compact body is designed to be handled at the cooling-system opening.
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No Batteries Required
The bulb operates without a cord, compressor, or external power supply.
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Tapered Rubber Cone
The cone seats in compatible radiator or expansion-tank openings.
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Visible Bubbling
See vapor pass through the fluid while you work the bulb.
Two Times to Reach for the Tester
A vapor check can fit into planned maintenance or an active repair diagnosis.

A Pre-Winter Check
If you’ve been topping off coolant, add a vapor check to your inspection before colder weather.
Before Ordering Another Part
If you’re considering a water pump because coolant keeps disappearing, add a combustion-gas check before committing to the repair.
A Practical Pick for Hands-On Drivers
Choose the kit around the recipient’s vehicle access and whether they already have compatible test fluid.

The Home-Garage Regular
A dedicated diagnostic tool for someone who handles their own cooling-system checks.
A First Diagnostic Kit
The fluid-inclusive option gives someone building a toolbox the indicator fluid for this check.
The Mechanic With Fluid on Hand
The tester-only kit suits someone who already keeps compatible fluid in the shop.
Choose Your Fluid Setup
Both kits include the tester and rubber squeeze bulb.
Leak Detection Kit
Choose this option if you already have compatible combustion-leak test fluid.
Leak Detection Kit With Test Fluid
This option also includes a 250 mL (8.45 fl oz) bottle of compatible test fluid.
Different Jobs, One Specific Check
Use it when the diagnostic question is whether combustion gas may be entering the cooling system.
DIY Maintainers
For owners comfortable following safe cooling-system service procedures at home.
Garage Technicians
For adding a vapor sample to an engine-sealing investigation.
Used-Car Shoppers
For inspections where the seller allows the check and the cooling-system opening is accessible.
Drivers Tracking Coolant Loss
For drivers who want another observation to discuss with a mechanic.
Combustion Leak Tester Details
Fit, Safety, and Reading the Result
What does the tester check for?
It checks cooling-system vapor for signs that combustion gases may be entering the system.
Will the tester fit my vehicle?
Check whether the tapered cone can seat at your vehicle’s radiator or expansion-tank opening and whether there’s room to handle the tester.
What does a shift toward yellow mean?
It suggests possible combustion gas in the sample. Further diagnosis is needed to identify the source.
What if the fluid stays blue?
Blue is the starting reference color. If the fluid stays blue and symptoms continue, use other mechanical checks to investigate.
Can I remove the cap while the cooling system is hot?
Never remove a hot or pressurized radiator or reservoir cap. Let the system cool and follow the vehicle and tester instructions before opening it.
Can I use my own test fluid?
Yes, if it’s compatible combustion-leak test fluid. Use the tester’s LEVEL marks to guide filling.
Give Your Cooling-System Check a Visible Reference
Check access at your vehicle’s cooling-system opening, then choose the kit that matches the fluid you have on hand.
Choose Your KitBoth options include the tester and hand bulb.
