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  1. Hissing from Expansion tank. 2.5V6 156 alfa.

    Alfa 147, 156 & GT
    So i bought a alfa 156 some months ago. Had a sudden leak from the radiator. Changed it. Leaked again it was the water pump. Changed it. Stoped leaking anywhere and one day it started trough the expansion tank. Changed teh cap. Continued to leak ( not as much ). And one fine day ( yesterday it...
  2. AR GT Q2 170 HP Hissing Sound on Acceleration - EGR valve/hose leak?

    Alfa 147, 156 & GT
    Hello everyone, once again. Today I figured out that my GT is making an hissing sound while accelerating. It seems that it makes no strange sounds while idle, but it starts hissing from 1500 rpm on. In order to be more specific, I'll attach a small video to show you what's going on...
  3. Hissing at idle, when clutch is pressed it goes away.

    Alfa 147, 156 & GT
    Hey there I have a '02 156 1.9JTD 8v, recently I noticed that when the engine is idling(neutral) some hissing comes from the engine bay, i can tell it's coming from the gearbox. When I press the clutch it goes away. what could this be ? is it dangerous ? because I am travelling soon (1000km) and...
  4. Hissing exhaust?

    Alfa Giulietta
    Hi Gents, I have an 1.4 MA Turbo where the front pipe "flex" had given up! When I removed the front pipe it came off in two parts :-) I had noticed a "hissing" noise from the exhaust - especially at low revs, so I thought that it was because the pipe/flex was leaking, a lot! BUT - new pipe...
  5. Hissing Sid & questions

    The Classic Alfa Romeos
    Woke my S4 up on the weekend after a four month sleep. Started easily (CTEK) & drove superbly. When putting back in the garage, it started to his. Fearing the worst (coolant leak) but not finding it, it sounded like air escaping. Tonight I found ( and temporarily fixed ) the cause. The...
  6. Hissing sound after pouring antifreeze.

    Alfa 159, Brera & 946 Spider
    Hello, I'm new owner of AR 159 1.9 JTS and previuos owner told me to pour some antifreeze, which I did it was on min line (I didn't overfill it). After some driving when I stopped car, car released some of antifreeze and I didn't drive it that day anymore. Today, I had some issues. Car...
  7. 147 JTD no boost, loud hissing noise (guessing an air leak)

    Alfa 147, 156 & GT
    Happened a few days ago, I noticed power losses but it still had a bit of a kick when you put the foot down. Today, full throttle almost no acceleration (but it could all be in my head). Loud hissing noises around 2500 RPMs. I passed through a tunnel with full throttle and it sounded like a jet...
  8. Hissing noise from Airconditioning.

    Alfa Giulietta
    Noticed a couple of days ago there was a noise coming from the vents like a noise from a puncture! Never had any issues or work done but any ideas on this anybody?
  9. Rad and thermostat change, now overheating and hissing coolant cap

    Alfa 147, 156 & GT
    Hi guys, I have just replaced my radiator and thermostat on the 156 jtdm sport as the thermostats never worked and the rad got a hole in it. Now it's my first radiator change so it's probably something I have done, well haven't done, after I replaced the rad and thermostat I filled the car up...
  10. hissing on accelleration, shakey at speed, shakey when braking

    Alfa 147, 156 & GT
    So....after a year of neglecting my alfa because i have zero spare time ever....she has now decided to bite me in the ass :) Over the last few weeks i have noticed things start to deteriorate, and still failed to sort anything. So now I think the car has decided to force my hand to take more...
  11. GT coolant expansion tank 'Hissing'

    Alfa 147, 156 & GT
    A few times recently on starting the car I have heard a hissing sound from the engine compartment, sounded like water dripping on something hot. But yesterday I was checking under the bonnet with the car running & sound was coming from the coolant expansion tank. I cold see bubbling around the...
  12. Hissing from rear

    Alfa GTV & 916 Spider
    After a nice I switched off the engine but as I approached the boot I could hear a hissiing sound. Only can be heard from the passenger side rear wheel area. Initially thought the tyre had a puncture but turned out to not be that. Thinking fuel pump or maybe something leaking on to the hot...
  13. Hissing servo

    Alfa GTV & 916 Spider
    My servo fails the 'air tightness under load test', so i need a new, second hand or reconditioned servo for my V6 1999 GTV. Can't find much on the net. Dealers say discontinued. Can anyone help?, thanks, Gaz.
  14. Air con hissing from vents

    Alfa 147, 156 & GT
    Hi all! A couple of weeks ago I had my air con repaired as it was empty, and it turned out it was leaking. I got a new hose, and some form of seal conditioner was put into the system by the aircon technician). For a couple of weeks it was excellent, but earlier this week I noticed it hasn't...
  15. This sounds Dangerous! Hissing.

    Alfa 147, 156 & GT
    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...
  16. Alfa GT, Kangeroos, Turbo Sensors, and hissing? Possible Boost/Turbo Problem

    Alfa 147, 156 & GT
    Hey Guys, So had my GT for ages now and people keep asking me the age old Alfa question, and my response, after 5 years of trouble free alfa-ing (more or less) has always been its a myth! However, recently in the past few months there has been an odd 'kangeroo' effect from 2k-3k revs on...
  17. Hissing Sound when on boost

    Alfa 147, 156 & GT
    All, new Alfa owner, fantastic board! Searched the forum trying to diagnose the popular whoosh/hissing sound (lower or upper split hose. But looks like mine has a lower SAMCO hose fitted but this is what I found (definitely a pipe/hose missing). What kind of pipe/hose is missing and where does...
  18. Hissing noise from steering wheel

    Alfa GTV & 916 Spider
    If I put sterring wheel on full lock then release about 1 inch, I get a strange hissing noise from the top of the steering wheel, sounds a bit like gas escaping. Any ideas?
  19. Hissing sound under acceleration

    Alfa Giulietta
    Hi all. Been lurking for quite some time now, but never posted. Now, I've a question. A week ago I got my hands on a brand spanking new 1.4MA Giully, and I'm in love. :) I might have an issue, though. Whenever I press down hard on the throttle, I hear a hissing sound seemingly coming from the...
  20. 147 TS Hissing Sound

    Alfa 147, 156 & GT
    Hey guys, have just returned from a week long work assignment and took my 147 out for a drive upon getting home :thumbs: Curiously when I parked after about a half hour, there was a very noticeable hissing noise coming from the rear of the car. At the time I thought it was the tyres but checked...