Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

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)

strange sound from engine

Recommended Posts

Hi Guys,

Initially I thought I need to replace a water pump on my 98 Boxster, now it seems, it may be even a bigger problem.

So here it goes,

Recently I noticed that my car would produce whistling sound around 1000~2000 rpm, especially at stop, noise is just unbearable.

So I did some research here on the forum and many of you have had this problem and it points to a failed water pump and/or pulley.

So what I did was to drive my car for a while to warm it up, the noise kicks in after the car got warmed up. Got back and then I removed the cover to gain access to the engine.

Took off the serpentine belt and started the engine and the noise is still there, sounds like it is coming from the main crank shaft "pulley" , initially I thought, this is it, the engine is on it's way to ruin.

But this is what I observed, the noise would last about 1 sec, after I turn off the engine, in fact I noticed that the crank shaft pulley would stop turning and the noise would last about 1 sec and it dies down.

Would this point to some problem other than mechanical failure of engine parts. :(

I recently changed the spark plugs, and somewhere in the forum mentioned that if the sparrk plugs weren't torqued correctly, it would also produce some strange sound.

If the problem isn't asssociated w/ the spark plugs, what other problem would it be.

Any help is greatly appreciated.

Link to comment
Share on other sites

A loose spark plug will cause a whistling sound - so I would re-check the torque of each plug.....

The sound could also be caused by a failing AOS (air/oil seperator). To check, remove the oil filler cap with the engine idling - if the cap is difficult to remove (a vacuum) then there is a good chance the AOS is on its way out. Are you experiencing a smoking exhaust at startup - this is another classic of a failed AOS.

Hope this helps.....

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • 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.