Quote:
Originally Posted by Mr 286
The hiss is definitely not normal. I had a similar sound occur about a month or two before the pilot bearing went out on my clutch (something I was told by a mechanic is quite common on Subarus). So, if you're hearing a sound like you've got a vacuum leak or hiss when you blip the throttle, it may be a sign that the clutch pilot bearing is about to go soon. Hissing will go away and come back intermittently. Then there will be a rattle when it does go.
Keep an eye on this and don't just write it off as normal noise. If it isn't something you expect to hear, then it is never normal noise. Hopefully yours is not as severe an issue.
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If it was clutch related, would pressing the clutch in have any effect on the noise?
I will try to get a vid tonight.