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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🔍 Catch leaks before they catch you – be the boss of your engine health!

FAST USER FRIENDLY - Get reliable results quickly with an easy-to-use, classic cylindrical tester.
LIGHTWEIGHT PORTABLE - Compact 220g design lets you carry professional-grade diagnostics anywhere.
DIY ENGINE HEALTH CHECK - Skip the mechanic—test your cylinder head gasket yourself and save time & money.
PRECISION YOU CAN TRUST - Engineered in the EU for 99.9% accurate gasket leak detection.
UNIVERSAL COMPATIBILITY - Fits cars, trucks, motorcycles, and heavy machinery with a 25-55mm adapter range.

The RELD Cylinder Head Gasket Tester Kit is a professional-grade, EU-manufactured diagnostic tool offering 99.9% efficiency in detecting combustion leaks. Its universal adapter fits a wide range of vehicles and machinery, enabling fast, accurate gasket testing without mechanic visits. Compact and lightweight, it empowers vehicle owners to proactively maintain engine integrity and avoid costly repairs.

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Manufacturer	RELD
Part Number	7777252
Product Dimensions	15 x 10 x 5 cm; 220 g
Item model number	7777252
Colour	Multicoloured
Style	Classic
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Item Weight	220 g

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

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