Coolant leak found with UV fluid.

4.2 V8 32v FSI - 444 bhp
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Clickme
Neutral
Posts: 1
Joined: Wed Jan 04, 2023 10:31 pm

Coolant leak found with UV fluid.

Post by Clickme » Wed Jan 04, 2023 10:43 pm

Hi all,Hoping to get some help

Been noticing after a few hundred miles or so I would have a slight loss in coolant that would require a top up every now and again. Couldn't find any noticeable signs of a coolant leak so I thought id try the RING automotive coolant dye. Plopped it in and noticed a slight weeping of UV fluid on the bottom right of the radiator, Is there a common part to fail? More interestingly a few days ago I changed the plugs and HPFPs on both sides as I was having warm start issues, fuel smell in the oil cap which was making me believe that one of the pumps was failing. The bit I'm puzzled by is that after changing them I seem to have a UV buildup on one of the fuel rail connectors and a very slight fuel leak. I'll be reseating the connector just incase it isn't totally sitting home correctly but how on earth is the UV fluid making its way into the fuel system?

Pics as attached.
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Bendelaurence
2nd Gear
Posts: 130
Joined: Tue Apr 03, 2018 2:38 pm

Re: Coolant leak found with UV fluid.

Post by Bendelaurence » Fri Jun 16, 2023 6:39 pm

It’s not the dye mate. Petrol is fluorescent under UB light

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