Does it work with diesel engines?

I think it will work but may turn green rather than yellow. There are fluids designed for Diesel engines and I believe those are red in colour.

is this safe for the coolant system? i have it and i think some got sucked into the coolant tank

Yes, It's safe for the coolant system if you use the liquid in accordance with the instructions.

How can I use this if my radiator does not have a cap?

It should go into the opening for the cap on the overflow bottle which should be where you can top up the coolant level.

think if you put this on during warm up it will give a false negative. Doesnt do full green but very very light blue due temp chemical react ?

I used it on my Capri and had it in place from start up. I ran the car until the thermostat opened and the car was operations at full temp. Thankfully there was no colour change at all. Shouldn’t give a false negative and shouldn’t react with temperature. Only if the system contains exhaust gasses.

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Reld Cylinder Head Gasket Tester Kit CO2 Combustion Leak Gas Test Universal for All Cars and Motorcycles Petrol Diesel Block Rapid Engine Leak Detector for 50 Tests

Reld Cylinder Head Gasket Tester Kit CO2 Combustion Leak Gas Test Universal for All Cars and Motorcycles Petrol Diesel Block Rapid Engine Leak Detector for 50 Tests

Product ID: 136048058

Details

Alarm
Visual
Brand
RELD
Colour
Multicoloured
Global Trade Identification Number
Item weight
240 Grams
Operating humidity
90 percent

🔧Universal adapter fits 25-55mm engines

⏱️99.9% efficiency rapid testing

🛠️50 tests per kit for long-lasting use

¥7076

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔍 Don’t let leaks drain your drive—test smarter, drive safer!

COST TIME SAVER - Avoid costly repairs and downtime by catching gasket leaks early with 50 tests included.
INSTANT LEAK DETECTION - Skip the mechanic—diagnose cylinder head gasket issues yourself in minutes.
HIGH ACCURACY GUARANTEE - 99.9% efficient CO2 combustion leak detection ensures reliable results every time.
UNIVERSAL COMPATIBILITY - Works seamlessly on cars, trucks, motorcycles, and heavy machinery with a wide adapter range.
TRUSTED EUROPEAN QUALITY - Crafted in the EU by RELD, a top brand with 4.5-star reviews and proven durability.

The RELD Cylinder Head Gasket Tester Kit offers a fast, reliable, and universal solution for detecting CO2 combustion leaks in petrol and diesel engines. Compatible with a wide range of vehicles and machinery, it delivers 99.9% accuracy and includes 50 tests per kit, empowering professionals and enthusiasts to diagnose engine gasket issues efficiently without mechanic visits.

Specifications

ASIN	B07RS3N98V
Alarm	Visual
Best Sellers Rank	2,902 in Automotive ( See Top 100 in Automotive ) 120 in Diagnostic, Testing & Measuring Tools
Brand	RELD
Colour	Multicoloured
Country of Origin	Poland
Customer Reviews	4.5 4.5 out of 5 stars (7,940)
Global Trade Identification Number	05907440789067
Item Dimensions D x W x H	17D x 9W x 5H centimetres
Item Weight	240 Grams
Manufacturer	RELD
Model Number	7777252
Operating Humidity	90 percent
Part Number	7777252
Power source	Battery-Powered, Corded Electric, Solar
Product Style	Classic
Unit Count	1.0 count

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