Sports Exhaust - slight clattery sound when cold

[ellism]

Hi all - this is my first post on the 997 forum since graduating from my 996 just over a week ago. I've seen a number of posts about the relative merits of the various 911 models. I'm on my 4th now and I have to say that my experience so far is that finally I am driving the 911 I always wanted (although in a perfect world with more cash and storage space I would gladly have my old 993 back as well frankly).
Anyway, the reason for this post is to mention that I am noticing when I start the car up that my exhaust sounds a little clackety. It very soon goes away when the car warms up though. Is this normal?

Thanks and regards

Ellis

 

[johnk]

what you find with the 997 sports exhaust is either the valve's on them clatter or the insides of the silencer fall apart causing noise

 

[Terry]

In my experience they are a bit noisier until they warm up. I do not think it is anything to worry about.

Terry

 

[ellism]

Thanks Terry. That's a little more reassuring. I was hoping the fact it goes away after a few minutes means it isn't too serious.

 

[garyw]

Although a differnet engine to yours Ellis, I have to say mine makes a right noise when starting up from cold! not a noise I dislike in any way but it does settle down once a bit warmer []

garyw

 

[circleace]

Hi Ellis
I have noticed this also whe cold and I believe it just something you put up with.
Must say nice collection of previous cars......

 

[berty987]

I have a 987 boxster with the PSE fitted. As described above the valves have a tendency to clatter in the closed position often just after start up. Looking under the rear of the car I found that pushing the pivot pin on the flap back into the silencer removed the clatter. I think the issue is that the flap on the pivot pin can drop and fret against the inner bore of the bypass pipe, thus causing the noise. The only way I can think of solving this problem would be to fit a small spring or wave washer on the top side of the exhaust pivot pin to hold the flap more central in the pipe.A brief tap with a pin punch often solves the problem for a few weeks or actuating the PSE on an off. I did get some benefits from smearing a dollop of hi temp silicone grease on the pivot pin which finds its way into the mechanism and gives some relief for a time.