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Discussion Starter #1
Hello all,

Thinking of buying a 308 HDi and while examining it noticed that this part had a sticky fluid underneath it.

Unfortunately not being familiar with the engine I don't know what it actually is (although I know lots of things it isn't). Can anyone help me out here?

I've made a handy picture, but can't attach it because I'm a noob so I'll have to describe it. *sigh*

OK. It's on the left hand side of the engine compartment near the radiator as you look in, right next to the power steering fluid filler cap. It's a silver, upright cylinder about the size of a yoghurt pot with a smaller black screw cap (?) on top of it. It has two silver pipes (one thin, one thick) leading to it from the windscreen end of the engine compartment.

Thanks to anyone who can help!
 

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Don't have a 308 HDI but sounds to me in your description similar to the air con system on my 307 HDIm can't imagine what the sticky stuff is though.
 

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Discussion Starter #4
Aircon it is

Don't have a 308 HDI but sounds to me in your description similar to the air con system on my 307 HDIm can't imagine what the sticky stuff is though.
Perfect!

Looking at replacement parts it does indeed look like it's the aircon system.

That's curious then, because that would leak gas not fluid.

I was suspicious of this part because it was over the stain and felt wet underneath, but it was probably just unconnected condensation.

The fluid is slightly sticky, slightly brown, and has formed a sort of spotty splat under the area by the aircon valve (where there are few other pipes - just the engine coolant, which it isn't) and I couldn't smell an odor on it.

Perhaps someone just spilled their coffee? More likely it's left over from a clumsy top-up of the power steering fluid, as the filler cap is near it, made messier by condesation dripping on to it. I'll wipe it up with a cloth, drive around a bit and see if it comes back.

As The Tick says, we're probably OK if we don't lick it.
 

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The Aircon gas also contains a lubricating oil which could be the fluid you have described. Is the aircon working or not? If you have a gas leak then it would not blow out cold air.
 

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Will recheck aircon.

Aircon seemed to be working. I actually found a sunny day to test it, but will revisit it and see if I can simulate arctic conditions in the cabin.

TBH I'm not too worried if it is the aircon. A problem with that is non-critical and pretty easily fixable. Would have worried more if this was a defect in something more important. My old car didn't even have aircon, and I lived with that happily for 4 years.
 
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