BT-600 Replacement Combustion Leak Test Fluid 16 oz

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.

This stuff detected a head gasket leak in about a minute. Unless your leak is so bad that it immediately blows all the fluid out of the tester, it only takes about an ouce of fluid for one test. If the fluid does blow out, no need to retest. :-P

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.

Works great, found out the hard way cigarette smoke will cause it to change keep the lid on the bottle right away after filling tester lol

Accuracy is important when block testing .This product is the best for it's purpose .Dark Blue and changes clearly to a yellowish green when combustion gases are present in the cooling system .

Worked good. And i got it fast.

i love it and it's great too

I had purchased some discount auto store version of this test fluid. Didnt show any color change. Purchased this stuff and had an immediate color change showing head gasket failure. This stuff is very sensitive and way better than anything you're gonna buy at a discount auto parts store.

Just the thing