Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

odd sound from engine compartment after driven hard

Recommended Posts

I only noticed this sound recently, kinda like a gear drive or blower. I've never heard this before, or since. It occurred a handfull of times, when we had short breaks between autocross runs, and was coming from the engine compartment. It didn't do it earlier in the day, when it was perhaps cooler and we had longer breaks between runs. You can hear it in this video.


It only started at the end of a run and was dependend upon engine RPM, and not dependent upon the car moving. It went away after about a minute or two. It didn't last long enough for me to park and pop the hood and maybe get a better idea of where it was coming from. When I got home I took the accessory belt off to check the idler pulleys, alternator, etc. and they all felt fine. I replaced an idler pulley quite some time ago, which sounded a lot different (loud screeching, bearing self destructing sound) when it needed replacing. Any ideas?

Link to comment
Share on other sites

it's never, ever, been that loud before...I know what that normally sounds like and this isn't it, unless it's changed it's tune very significantly and gotten 50x louder. What do they sound like when they die?

Edited by kpl
Link to comment
Share on other sites

  • 3 months later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.