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)

Tapping On Start Up


Recommended Posts

Don't know whether anyone else has come across this before, but on my 99 996 C4 (3.4) I get a light tapping noise on start up, a bit like a noisy tappet. This noise goes after approx 5 to 10 seconds, and is more prominent when the car hasn't been run for a couple of days.

My OPC thought it was the cam chain tensioners and replaced those under warranty, but this didn't cure the fault. The car is now booked in again for further investigative work. It sounds like a lazy hydraulic tappet to me, which are fortunately covered by the warranty.

The car has just had a 24,000 mile service, and so the car has recently had some fresh Mobil 1 (0W40) oil in it.

Anyone else had this problem and solved it?

Any help or advice would be appreciated

Bill

Link to comment
Share on other sites

Thanks for the advice - I did wonder whether I was being paranoid. When the car is hot and running it sounds fine.

I suppose there's no harm in letting the OPC have a look at it if the work's covered by the warranty - so I'll see whta they come back with.

If the work's not covered then I'll leave it unless it gets worse.

btw Do you guys all run on Mobil 1 (0W40) in the US?

Link to comment
Share on other sites

I have a similiar experience with my '03 996; just a few seconds after start up and then into the 'normal' engine sound. During the very hottest days of the summer it last longer, perhaps as long as a minute; both the dealer and two indie mechanics provided the same answer as Loren's.

I use the Mobile 1 0 W 40. The car is a daily driver, approximately 35 miles a day in the furnace known as Las Vegas.

Link to comment
Share on other sites

I use Red Line 5W40. Full synthetic. Love it. Great oil. Expensive- $9/qrt. Car sat for 5.5 months during winter storage. At first start-up, car sounded like it had been pre-warmed.

I drive it about once a week, 350-450 miles in that one day, all at once!

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.

Guest
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.