ERRECOM Brilliant Coolant – 100 ml, Car Radiator Coolant Cooling System UV Leak Detector Dye

There's loads of liquid here, you only use a bit. With a cheap ultraviolet torch from Amazon I found my 1 leak and glad to say there was only that 1. This stuff does exactly what you expect it too. The leak was in a hard to spot area where no daylight can reach so with the ultraviolet torch this stuff stood out well, nice bright reflection. It will last for a long time this bottle as there's so much in it. I nearly poured the bottle in, good job I read the instructions. Incredible value for money tbh, I've let somebody else use it on their car too with similarly excellent results.The only thing negative was the bottle leaked in transit so I had to take it out of the packaging in the sink with the tap on but only a little bit had come for m under the lid and the packaging had taken a beating too.

Was really struggling to see where my coolant was leaking from but I could see steam coming from the back of the engine. Thought I'd give this a try and I'm definitely glad I did. Make sure you buy a UV torch rated at least 395nm and you'll be grand.As you can see in the pic, there was a tiny puddle right down at the bottom (on the subframe?) but no coolant at all above that general area so that narrowed it right down. There was a coolant pipe that goes from just next to that puddle and back up and into what I think is the heater core inside the van. The pipe had a hole in it.This has saved me a fortune. We all know if I took this to a mechanic there's a 50% chance I'd have been absolutely ripped off or they'd have had the van for a week.Chuffed to bits with this 👍