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)

Engine vibration and noise

manud
 Share

Recommended Posts

manud Member

manud

Posted
Posted

Hi guys,

I own a 98 Boxster since now almost 5 years. No major problem so far. I replaced the air flow sensor and the coolant fluid reservoir. Nothing really serious until (I hope not) now...

I recently opened my engine compartment and I found out that my engine was making some weird "grindy" noise and was vibrating at 2500 RPMs and at 3500 RPMs. These vibrations are so strong that they can be felt while engine braking.

I had the Porsche mechanic checking that out and he mentioned that the problem could come from either a bearing from the crankshaft or a faulty chain tensioner. However, he wanted to investigate further. As he was performing the usual maintenance on the car, he found out that the used oil had some small aluminium and bakelite part in it. He diagnosed it as an issue with the variocam unit. He fears that the chain is rubbing the cylinder head (hence aluminium pieces in oil) and that the bakelite comes from the variocam unit.

The car runs really well! Good accelerations, no stall or loss of power. No CEL and No P-codes reported.

Any ideas? Thoughts?

Thanks

ManuD

Link to comment
Share on other sites

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
 Share
Go to topic listing
×
×
  • 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.