

🔍 Don’t guess, test—engine confidence in your hands!
The RELD Cylinder Head Gasket Tester Kit is a professional-grade CO2 combustion leak detector designed for petrol and diesel engines. With a universal adapter fitting 25-55mm cylinders, it supports cars, motorcycles, trucks, and heavy equipment. Offering 99.9% testing efficiency and up to 50 tests per kit, it empowers users to quickly diagnose gasket leaks, saving time and costly mechanic visits. Manufactured in the EU, this compact, easy-to-use tool is trusted by thousands for reliable engine maintenance.









| ASIN | B07RS3N98V |
| Alarm | Visual |
| Best Sellers Rank | 1,610 in Automotive ( See Top 100 in Automotive ) 68 in Diagnostic, Testing & Measuring Tools |
| Brand | RELD |
| Colour | Multicoloured |
| Country of Origin | Poland |
| Customer Reviews | 4.5 out of 5 stars 7,371 Reviews |
| Global Trade Identification Number | 05907440789067 |
| Item Dimensions D x W x H | 17D x 9W x 5H centimetres |
| Item Weight | 240 Grams |
| Item weight | 240 Grams |
| Manufacturer | RELD |
| Model Number | 7777252 |
| Operating Humidity | 90 percent |
| Product Style | Classic |
| Product dimensions | 17D x 9W x 5H centimetres |
| Style | Classic |
| Unit Count | 1.0 Count |
G**S
SAVED ME A FORTUNE
"Saved me a fortune" I wasn't sure if my head gasket had gone after my coolent reservoir was empty on my van and heaters were blowing cold air. I called a local garage and they gave me a quote for an inspection which I could not afford. Then I saw this. Arrived in good time. I followed the instructions and turns out my head gasket is fine after all. This kit has everything you need for up to 50 tests. Value for money is excellent and the quality of the parts is really good. Functionality is spot on as it's a very easy to use kit. Highly recommend product.
W**S
Great item
Worked as stated and easy to use
S**S
Accurately diagnosed head gasket failure
I'm sure no one wants to have to buy a head gasket testing kit, but sometimes necessity demands it. I brought this kit to test the head gasket of my Rover 45, with a 1.4 k series engine, renowned for head gasket failure. I had seen some symptoms of gasket failure, so brought this kit to be sure before taking to a garage. The kit contains instructions for use, which are easy enough to understand, but a little vague in some areas. We were left wondering if we were doing the right thing at some stages. The rubber bung looks like it would fit a wide variety of expansion tanks, as it has a fairly significant taper. There is enough liquid for probably 30 tests. The liquid is supposed to turn green, or yellow after about 5 minutes if exhaust gases are present in the coolant system. Sure enough, after about 5 minutes then liquid turned very slightly green. The colour change was so slight that we were still not 100% confident. But the garage confirmed that even a slight change is a smoking gun. After taking it to the garage, they confirmed that the head gasket was blown. So this test is definitely accurate. Just not to be used as the sole test, just as a guidance. The kit is good quality, and does what it says, so functional.
B**N
Cheap and effective
Cheap wee kit to test for combustion gasses in the coolant. Unfortunately often gives you the bad news your expecting. Works well and tells you if you have a head gasket leak
R**D
Positive
I'm thrilled with the RELD Cylinder Head Gasket Tester Kit. It's incredibly easy to use, and the results are clear and quick. I was able to confirm the integrity of my head gasket with confidence, saving me a lot of worry and expense. The kit is well-made, and the reaction liquid works perfectly. Highly recommend this for its accuracy and convenience!
A**R
Works well!
It works well - easy to use. Now I know it will cost me a fortune to fix the engine, be conscious, knowledge comes at price 😅
R**Y
Worth buying.
Quite good, but it did give me a false reading once.
S**M
Does a great job
A great product at a great price
Trustpilot
2 weeks ago
2 days ago