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Discussion Starter #1
Ok, so I was driving my 156 2.5 V6 down a road with speed humps, slowly. went over a bump, accelerated away and suddenly heard the sound of hissing fluid as if a pipe had burst. The hissing lasted about 5 seconds and stopped once pressure had balanced it seems.

Fearing the worst, I coaxed the car home a mile away. Had a look underneath... nothing obvious.

Opened the bonnet and I could see a pipe dripping fluid (see attached images and video). Followed the steel pipe back to it's origin and it appears to go to the power steering reservoir. Or at least it disappears into the firewall underneath the power steering reservoir. Also there appears to be fluid dripping from beneath the reservoir.

Does anyone know what the pipe, pictured, is for? and has anyone encountered the same problem?
 

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They look like the pipes for the air con.
Just beat me to it :)
 

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100% A/C pipes.

Does your A/C compressor still kick-in...?
 
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Discussion Starter #8
PHEW! So at least its safe to drive. Just my luck the weather will pick up now I bet and my aircon won't work.
 
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Discussion Starter #10
OK so next question. Does anyone know any good aircon specialists to repair said pipe?
Around High Wycombe.
 

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I had a aircon pipe fail on my old 145 QV a few years ago. I had stopped at a petrol station (not for fuel luckily) and was in the shop queuing when someone pointed out that my car was 'on fire' as loads of smoke was pouring from under the bonnet....

There were no flames and it died away quite quickly, but i was really worried what had happened and did not want to start the engine, so called the AA. Took them a while to identify, but it turned out an aircon pipe had split where it ran quite close to the exhaust manifold, the aircon refrigerant had sprayed straight on to the manifold, hence the smoke!!!
 
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Discussion Starter #12
Aircon is blowing out nice cold air still. Will have to see how long it lasts I suppose. Fingers crossed.
 

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Wouldn't leave it too long to get it checked. If you've lost the refrigerant the compressor will be running with little lubricant and will suffer. Also moisture will get into the system which can be bad news.

That said, was the pipe frosty and white? Could just have been condensation :)
 

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If you've lost your refrigerant the low pressure switch will cut out and prevent the compressor from running.

On a healthy system with the engine running you should hear an audible click when the compressor clutch is activated, and be able to observe the central part of the pulley rotating.
 

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Hmmmm if the A/C is working I'd be trying to find out where the hissing really was coming from...!!!
 
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Discussion Starter #16
Coolant level is fine.
Power steering fluid level is fine.
Brake fluid level is fine.
Fuel level is fine.
 
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Discussion Starter #17
The A/C clutch is audible when switching it on and off.
 

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Then the hissing clearly wasn't your A/C leaking, otherwise ECU would not enable the A/C clutch.
It needs the correct pressure in the system, too much or too little and it won't allow it.
 
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Discussion Starter #19
Hmmm... back to worried.
Although checked all the reservoirs and all seem nominal.
 

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Checked the ATF Fluid...?
 
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