Lisle 75730 Diesel Detector Fluid

Works great!

Used this to confirm what was pretty certain, a head gasket leak. Sure takes the guesswork and time out of detecting head gasket leaks. I was already 95% certain one or both head gaskets were leaking using cylinder compression and leakdown tests and radiator pressure test. I like the ability to shutdown a cylinder bank and test for a leaking head gasket on one head or the other. Caution, if you do this, you will most certainly trip computer codes and the engine service light on the dash. You need to be aware that you have to check that your code reader (if you have one) will reset the engine service light. Not all will. Many will clear codes but not reset engine service light so you may have to got to a shop to have light reset. Some car models can be manually reset or there is some trick to reset.One of the other anecdotal aspects of this test is that you can tell which cylinder bank is leaking faster or slower. The color change for my testing was gradual, ie it went from blue to green to yellow. This shows that the color change is relatively proportional to the amount and rate of leakage. The color change for the right bank was pretty quick and the color change for the left bank took several minutes. I ran this several times on both a hot and cold engine. The results were generally reproducible.

This kit is super easy to use and I prefer this style as I already have a hand vacuum. I use the same one as for brake bleeding. This as opposed to the other kits that have a built in bulb but that's a spot where it can break and render the kit useless.Its super easy instructions to follow and can give you a look to see if exhaust gases are present or not in the coolant knowimg if there is head gasket integrity issues.

The product is for my husband to do a combustion leak test on my land rover range rover. The product once obtained was just fine, however your cutomer service dept. took it upon themselves to order the wrong one from my choices to have it delivered in a timely manner. That would mean it would be ordered from an outside source and I would pay shipping. I also had a choice to order from the amazon product and then there were two in my cart and I could not get the second one out. I have ordered from Amazon for many years and am very familiar with how to do orders, whether it be one click or regular, and even how to get free shipping. Imagine that. I was treated like a loser, like I had no intelligence on how to order products and tried to explain this but encountered difficulty with agent. The agent took one off and then proceded to charge me shipping although it would mean it would delay the delivery time of my product, if I ordered the amazon product. Like 3-5 weeks; I needed it sooner: well, I called and complained as the agent had promised he would make the change to free shipping as the item qualified: after an arguement, I was able to get the free shipping since they messed up on my order. It was not pleasant and I must say this is the first episode of this having happened; it was purely the agent treating me badly,trying to instruct me on how to delete the one click order as it apparently looked as if I had chosen that method. I think you could have avoided this all together if your agents weren't outsourced to a foreign country, where you get what you pay for. A country where women are second class citizens and that was the tone of this transaction. I did get the free ship, but I should not have to write and let you know that this particular employee, the second one, not the first, was rude and thought I needed to learn how to shop properly online. LOL on that. I shop online all the time....Imagine that.

Over the years of using a block tester, I never thought there could be a difference in quality of the fluid being used.Make no mistake this fluid is the fast responding to combusting gasses. When compared to the competition out there this fluid out performs in every aspect.Good quality, easy to use, easy to store and it doesn’t leak.

Not sure why but typically this stuff turns green sitting on the shelf. So far this batch is holding up.

Glad I found this on Amazon. I haven't opened the bottle yet, but if it works as good as the stuff that came with my combustion leak kit (which I expect it will, since the bottles are identical), it will work like a charm and at half the price of ordering a replacement from the catalog. Make sure to test your results. That is, if a combustion leak ISN'T present judging by the lack of color change, exhale into the tube and see if the CO2 in your breath is enough to cause the blue to turn greenish-yellow. If not, then the chemical itself is faulty. The process I use is to let the car idle for about 5-10 minutes with the hood open, then get in and raise the RPMs to about 1200-1500 while in Park or in Neutral with the parking brake engaged. Then, I get out, open up the expansion tank cap, and a vacuum line to the engine, and use the vacuum to draw whatever gas is present in the expansion tank into my testing kit tube. I let it do that for about 2 minutes - if the color doesn't change, you're good to go.

The package arrived wet and the outside of the bottle was wet. The seal under the cap wasn't sealed. Regardless, there was enough product left to do a test.It's hard to tell if it's working unless it turns color, and mine didn't. So, I assume I'm all set.