Can this be used to diagnose an exhaust leak?

While the tool will detect exhaust gases (fluid turns from blue to yellow while squeezing the bulb), it probably wouldn't be able to pinpoint exactly where the leak is coming from. But, it may be useful in ruling out an underhood exhaust leak if you're trying to determine whether or not a particular sound (like ticking) is caused by an exhaust leak or some other mechanical problem.

How do i clean the the tube after use. Does any tester fluid leak into coolent while testing?

You can pop the top cap off and rinse it with water (distilled water if preferred if you have it handy). Tester fluid won't leak down into the coolant as there is a one-way valve in the cone end. Even if test fluid does somehow get into the coolant, there will be no adverse effects.

Can it be use for diesel fuel engine?

Yes, it works on diesel engines. A positive test might show a greenish-yellow color to the fluid rather than the full transition to yellow that you'd see when testing a gasoline engine with a combustion leak.

Does the engine have to be running to work or can we turn the engine over and over to test. will not start, we want to be certain of HG before scrap

I understand your concern. The block Tester detects combustion gases in the coolant system. It will not work if there is no combustion. I would say, if it is igniting the fuel in all cylinders while cranking, but will not remain running it may bleed enough combustion carbons into the coolant system. However, I honestly do not think it will work unless it is running. This block tester is only for head gasket combustion carbon leaks into the coolant system. It is not for head gasket leaks that result in water leaving through the exhaust system. I hope this helps.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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BT-500 Combustion Leak Test Kit

Product ID: 92405746

Details

Brand
Block Tester
Power source
Battery
Style
Handheld" or
Colour
Black
Item weight
1 Pounds

⏱️Instant results in seconds

🛠️All-in-one kit, no extra purchases needed

🔵➡️🟡Color-change fluid for clear leak detection

E£ 9319

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Don’t guess—know instantly with BT-500’s color-shift magic!

TRUSTED ACCURACY - Reliable identification of head gasket failures, cracked blocks, and warped sealing surfaces.
RAPID LEAK DETECTION - Diagnose combustion leaks in seconds with a simple color change from blue to yellow.
USER FRIENDLY DESIGN - Easy-to-use kit favored by automotive pros and DIYers alike for quick diagnostics.
OEM QUALITY PACKAGING - Packaged in a professional white box, reflecting industry-grade standards.
COMPREHENSIVE TESTING KIT - Includes all necessary fluid and tools—no hidden costs or extra buys.

The BT-500 Combustion Leak Test Kit offers a professional-grade, all-inclusive solution for detecting combustion leaks caused by head gasket failures, cracked blocks, or warped surfaces. Featuring a unique fluid that changes from blue to yellow upon detecting leaks, it delivers rapid, reliable results in seconds. Packaged in OEM-quality materials and highly rated by thousands of users, this kit is the go-to choice for automotive diagnostics without the hassle of extra purchases.

Specifications

ASIN	B06VVBSFTF
Best Sellers Rank	8,158 in Automotive ( See Top 100 in Automotive ) 124 in Fuel Systems
Brand	Block Tester
Customer Reviews	4.6 4.6 out of 5 stars (3,512)
Date First Available	13 Feb. 2017
Guaranteed software updates until	unknown
Item Weight	454 g
Item model number	BT-500
Manufacturer	Block Tester
Manufacturer part number	BT-500
Model	BT-512
Product Dimensions	25.4 x 7.62 x 12.7 cm; 453.59 g

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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