Strange noise - can anyone explain? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

mptoledo · 07-25-2009, 11:29 AM

I found this on another site, see if it sounds familiar. They describe it as a howl. see link below for full thread.

You may have to join to view, but it is free and painless. Decent site.
http://www.babblers.org/forums/showthread.php?t=9838

In my case it turned out to be a bad right rear wheel bearing. If you stop by the dealer or other mechanic they should be able to diagnose it for no charge. I had hoped it was just tire noise as it didn't seem to change much based on side loading. A test drive at the local dealer and subsequent inspection of the tires showed it most likely to be the wheel bearing and $500 later the noise was gone.

Here is another "hissing" sound thread:
http://www.babblers.org/forums/showthread.php?t=9998

barvid · 07-25-2009, 03:01 PM

Thanks! I think the hissing one is probably more on the mark than the howling one, but it still sounds like it's a physical (mechanical) thing rather than escaping air. I've decided I'm going to swing by my local Porsche dealer next week and ask them to take a look, which is probably no bad thing anyway given that I didn't get the car from a Porsche place. If there is a problem, I'll go back to the place I bought it.

Frank M · 07-25-2009, 04:37 PM

I thought I had read somewhere regarding the vent line to the gas filler inlet coming off or cracking.

barvid · 07-27-2009, 05:58 AM

Well, I had the car examined by Porsche this morning and it turns out the noise was nothing to worry about - an operational engine noise that can sometimes be made by the fuel injector systems, apparently. Which is good news. I'm really pleased I had it checked out, even if it did lighten my bank balance a bit, because now I can enjoy the car fully without worrying. The only items the report turned up was non-standard tyre foam and that the previous owner had inexplicably disconnected the front boot/trunk light, which they've rewired for me.

Thanks for all your help, guys - this forum has been a discover and I intend to stick around, either for future problems or to see if I can help or advise anyone else.