Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

LinkBack Thread Tools Display Modes
Old 07-19-2009, 10:25 AM   #1
Registered User
Join Date: May 2007
Location: Denmark
Posts: 71
Exhaust or cats rattle...

Hey Forum,

I have a situation here with my exhaust/cats system. I hope some of you might be able to help me give me some advice regarding repairs or perhaps a DIY fix...

My car is a Boxster 98, tiptronic, 143.000 km with stock exhaust system.

For the last 1-2 months my car has developed a rattle - In my opinion it has become worse over time, but maybe it has simply just become more obvious during the summer due because I have the roof down all the time.

I have a rattle from my exhaust/engine area. It's not constant and it's not a rotating sound, but very metallic and clattering. Its most obvious when the car is standing still and if I just tap the throttle lightly..

It gets better when it warm, but doesnt go away. Today I got underneat the car and took a water bottle and hit the two cats and that defenetly replicated the same metallic noise.... they weird part is the noise came wether I hit the left or right catalysator box so mabe the problem is not the actual boxes but something before the cats...

When I hid the exhaust tip the noise also appears, but not as loud so I think I am closer to the source of the rattle if I hit the catalysators.

The car drives nicely and I don't think it has lost performance or 'smoothness' when I accelerate.

I dont have a lift, and I am not very mechanical.. so I got these couple of questions...

But what should I do here?
- I read about hitting the cats with a happer when they are cold as a fix?
- I also wanted to hear if I can exchange one catalysator at the time or if they need to be changed as a pair?
- Any experience with the approx. costs of a catalysator exchange?
- I will have to take it to the mechanic, but before they simply say new cats I would like to know if there could be any metal/heat shields or sort of fittings/mountings that could have come loose they should check for - my mechanics have a history of just telling me to replace everything!

Thank you in advance!

williamsF1 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 03:16 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page