yellow leak

[Lucalare]

Water wouldn't turn yellow by contacting rusty metal. If anything it might get a tiny bit of orange in it, but not enough to make a stain, and certainly not yellow.

[03Sleepr]

my car doesnt make yellow snow either, thats usually me.

[Lucalare]

The only thing I could see coming from water leaking on exhaust would be maybe slightly red snow, if you had an exhaust leak before the cat, and a consistent dripping onto said leak. Then the water could potentially dissolve some of the NO2 that is in the fumes before the converter, making it red. However, a condition such as this would warrant an pre-cat exhaust leak and a faulty EGR valve, either of which would throw a check engine light.

[TheEdgeofSanity]

Originally Posted by robalero

I know what it is.

believe it or not its common and happens to every vehicle in the winter, its the water from the snow it hits your exhaust and then drips onto the snow in the yellowish/neonish color hence why its all over and around your car mostly if you follow the exhaust its right on spot with it

I'm going to agree with this because it happens to every single car we own - some of which have absolutely no neon yellow fluids.

[Lucalare]

Then it must be something that's on your roads, because I've never seen it happen here, and as I said previously, just water dripping on an exhaust pipe couldn't explain the conditions you have.

[robalero]

spc your right don't worry about it because you now know the answer to it

[robalero]

Originally Posted by Lucalare

Then it must be something that's on your roads, because I've never seen it happen here, and as I said previously, just water dripping on an exhaust pipe couldn't explain the conditions you have.

I think it has to do with the Salt they use on the roads something like that but its a chemical reaction thats causing the color

[zzyzzx]

Originally Posted by robalero

I think it has to do with the Salt they use on the roads something like that but its a chemical reaction thats causing the color

My vote goes for other chemicals applied to roads instead of salts .

[Lucalare]

Agreed, the only salts I know of that are yellow would be lead salts, or maybe chromium, neither of which would be dumped on roads due to the fact that both are toxic. My guess is that it's some compound that gets on the exhaust pipe, and reacts to the high temperatures, turning yellow. As to what that is, I haven't a clue, maybe I'll do some research.

[kwhauck]

Mag Chloride?

[Lucalare]

No, magnesium chloride is a white salt, whether anhydrous or hydrated.