

🧪 Detect leaks before they detect you — stay ahead with BT-600!
The BT-600 Replacement Combustion Leak Test Fluid is a 16-ounce solution engineered for up to 16 precise tests. Compatible with Block Tester devices and other fluid-based testers, it works across gasoline, diesel, propane, CNG, and alternative fuels. Its color-changing formula instantly signals combustion leaks by turning from blue to yellow, empowering professionals to diagnose engine issues swiftly and confidently.
| ASIN | B06WLKWB8T |
| Best Sellers Rank | 119,104 in Automotive ( See Top 100 in Automotive ) 478 in Fuel Systems |
| Brand | Block Tester |
| Customer Reviews | 4.8 4.8 out of 5 stars (397) |
| Date First Available | 2 April 1971 |
| Item Weight | 0.28 g |
| Item model number | BT-600 |
| Manufacturer | Block Tester |
| Manufacturer part number | BT-600 |
| Model | BT-612 |
| Product Dimensions | 6.99 x 6.99 x 18.11 cm; 0.28 g |
C**D
Block Tester BT-600 Replacement Combustion Leak Test Fluid 16 Oz
Quick shipper. Great item as described. Well packed. Great price. Thank you.
R**S
Unbelievable product
Does as it should the best brand there is out there for testing exhaust emissions in the coolant to see if the headgasket is gone
S**R
does exactly what it says
I own a garage and do these tests all day long. Works just the same as the more expensive stuff and came next day :-)
A**D
Block tester
A good item easily used with good results
J**H
BUY ME!!!
Excellent value for money. Have been buying these for years.
C**G
Replacement fluid
Does what it's supposed to do.
E**E
x
x
A**R
Nice
Just the thing
D**G
You're paying for the peace of mind you'll have, it will confirm whether or not you truly have a blown headgasket. Some cars (looking at you BMW) like to overheat even when the headgasket is not blown, so this is an essential tool for being able to say 100% that you have hydrocarbons in your coolant. The hydrocarbons are what this detects, and exhaust gasses create them. If the headgasket is intact, you won't have hydrocarbons in your coolant. So it's a pretty darn good test. I was able to use this on a car that ran fine, showed no issues, but slightly overheated at red lights. It confirmed that the headgasket is indeed blown and will save me tons of time and money.
D**Y
Need it for my tester
T**R
Not much to say. It show up a bad head gasket if you have the proper suction device.
M**.
This is a very reliable way to detect carbon gasses and possibly others. When used as prescribed, it detects the smallest combustion leaks within an engine. This can save thousands by early detection, or avoiding purchasing a vehicle that will need major engine repairs soon. It also rules out a mis-diagnosed combustion leak.
A**R
Orchard it should
TrustPilot
1 周前
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