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Your cart is empty.Block Tester BT-500 Combustion Leak Test Kit
Jester
2025-08-13 12:09:22
Easy to use. Works exactly as advertised (unfortunately, because I know I have a head gasket leak). That said, it's peace of mind, because I had no other symptoms of a head gasket leak, other than losing coolant over time.
Max
2025-08-06 12:49:43
My 2007 Ford Econoline (E250) with the 5.4L 2 valve v8 overheated recently on 500 mile trip in 100F temps going up 7k foot elevation. I was able to just barelly limp it home driving it at night stopping every hour when it got hot. When i got home i suspected a blown head gasket but it was loosing very little coolant and no smoke from the tail pipe and still running great. So I bought this chemical test to test the coolant for exhaust gases. Well let me tell you at first i was kinda thrown off since the color from my test barely changed to a dark greenish blue. But i did the test 3 times and got the very slight color chage every time. Everything i read said that ANY color change means gases in the coolant. I did a full compression test of ALL 8 cylinders to confirm the test and low and behold after 7 cylinders pumping out 200+psi i found the bad cylinder with 120psi. After gathering parts and 25hrs of my own labor i changed both my headgaskets and replaced everything in the cooling system and the van now runs better than New and doesn't overheat!A+ for this chemical test!!!!!If your ride is overheating and you suspect a blown HG this test should be your first step!
M. Franklin
2025-06-24 16:55:02
High quality construction. Arrived quickly on Prime.BACKGROUNDI used it to confirm (?) the Honda dealer's diagnosis of "coolant was two quarts low -- seeing bubbles in the radiator -- don't drive it -- must diagnose further."After they saw bubbles, they said the opened up the engine and gave it a leakdown test. All cylinders less than 3%. Then they said they needed to do a "five-gas" test, but didn't have time that evening. They wanted to keep it overnight and do more work on it, but that didn't work for our schedule.I kind of wondered why they didn't do that ten minute long "five-gas" test first before spending an hour tearing into the engine. And I wondered why they didn't just spend the five minutes it takes to use one of these testers. The story was a little fishy, or maybe they were just clumsy and less than highly skilled. Anyway, I didn't trust them 100% at that point, so I needed a second opinion.ENTER THE BLOCK TESTER TOOLUsed my tester. Lots of YouTube videos available if you're not familiar. They basically follow the proper directions on the card. Lower the radiator level by 2-3 inches with a turkey baster. Fill the tester. Place tester tightly over the radiator opening and start working the bulb to draw the gases through it for ONE MINUTE.1) I ran the engine warm. Didn't see bubbles.2) I took it on the interstate for a while. Didn't see any bubbles.3) I tried it from dead-cold overnight. Still didn't see any of the bubbles mentioned by the dealer.After each visual test I ran the Block Tester with fresh fluid. Pretty much the fluid stayed imperial royal blue. Fresh fluid for each test.After one of the tests just for fun, I waved it in the exhaust tailpipe plume -- instant translucent hot chrome yellow. So the fluid works, but it just didn't find any combustion gases in the radiator.Also, after one of the tests I kept vigorously pumping for at least another five minutes and it went slightly off of the deep imperial royal blue (almost faintly indigo) toward being still strongly blue but having the slightest hint of aqua. I had some concern. But then I also tested with fresh fluid out in the clean air, and it took again about five minutes of vigorous (spastic?) pumping go get that slightest hint of aqua. Conclusion here, again, is there there were no combustion gases present in the coolant system.I wonder what the Honda mechanic saw?CONCLUSIONThis tester is awesome. Super easy to use. I would recommend it to friend.
Joseph D'Erasmo
2025-06-23 14:42:08
The only issue I experienced is that it doesn’t fit the radiator cap snug, but it still works.Picked up even the minimal hint of fuel in the coolant. So minimal I couldn’t even small it.But I used a head gasket sealer and now the jeep runs perfectly. No more misfires.
Chris
2025-06-04 10:20:49
I was having cooling issues and before I swapped too much (the radiator) I decided to buy and run this test. No issue with the head gasket and for fun I put the solution/test near the tail pipe to confirm the solution color changed.Definitely worth the cost to do the test before you move forward.
David
2025-05-28 11:20:32
It worked so well in fact I thought it wasn't working. I pumped and pumped, waited, nothing. I for sure was expecting my issue to be exhaust gasses from a blown gasket. There was not, the fluid didn't detect any. I put the nozzle of the tool near the exhaust, and took 1 pump of the exhaust and it immediately turned yellow. Clear as day. I'm very confident this tool saved me time troubleshooting an issue that didn't exist. I figured out it was a bad radiator cap all along.
Mobile Mechanic
2025-05-02 16:24:55
Can’t beat this price and quality
John P.
2025-04-12 17:37:21
I hope this tester works as advertised because it's telling me I don't have a blown head gasket.Pinch off the overflow hose if the tester doesn't pull properly. Plenty of extra fluid for more tests.
Jason Chow Realty
2025-02-27 10:02:43
I received the item in front of my door.
Jdavila
2025-02-22 17:36:18
Exelete producto, muy eficaz , no puede faltar en un taller mecanico
Frederik
2025-02-19 14:31:03
The media could not be loaded.
Customer
2025-02-17 14:49:38
Worked exactly as expected. well worth the money. Diagnosed head gasket failure. 100% would recommend over cheaper alternatives
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