Hissing sound at pulley side. Any ideas?

[DCC]

I was getting to work today and when I was at the garage ramp waiting for the barrier to open, I noticed some hissing sound coming from the passanger side. Did a quick check, alt and PS pulleys seem ok, but the noise starts as soon as the engine starts turning.

I will be checking all belts, pulleys and Tbelt tensor thoroughly later on. Any ideas of what else to check?

Thanks in advance.

[rabbitman]

I was getting to work today and when I was at the garage ramp waiting for the barrier to open, I noticed some hissing sound coming from the passanger side. Did a quick check, alt and PS pulleys seem ok, but the noise starts as soon as the engine starts turning.

I will be checking all belts, pulleys and Tbelt tensor thoroughly later on. Any ideas of what else to check?

Thanks in advance.

T-belt tensioner comes to mind.......

[DCC]

T-belt tensioner comes to mind.......

We have a winner! 

And it is (was) a new tensioner, from a new SKF T-belt kit with barely 15.000 km on it. Guess I'm not lucky with spares lately. Will find another one and replace it, even if the noise became quite quieter now.

[rabbitman]

T-belt tensioner comes to mind.......

We have a winner! 

And it is (was) a new tensioner, from a new SKF T-belt kit with barely 15.000 km on it. Guess I'm not lucky with spares lately. Will find another one and replace it, even if the noise became quite quieter now.

  Was it a constant hiss or did it vary?

Mine does an intermittant/regular timed hiss, it did it with the old tensioner a year or two ago too though so maybe it's something else.

[DCC]

Was it a constant hiss or did it vary?

It is variable in loudness.. sometimes it's almost impossible to hear above the "clackaclacka", but sometimes not.. it's like a giant hairdryer.

Tomorrow I have some spare time, will check it up with my trusty ol' mechanician.