Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

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)

Recommended Posts

I took my C4S (about 85k miles) into the shop the other day, and my mechanic noted that there was some (not a lot) coolant weeping from the head gasket.  He said it would probably self-seal, but suggested that I might want to look toward upgrading to a 997.2 or a 991.  Any commentary on whether it is ever worthwhile (financially) to grin and bear this repair bill, sell the car, or take some other path?

Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

Has the head (on the leaking side) been removed before? The head gaskets are quite strong on these engines and they seldom fail. Also, is he sure the leak is from the head gasket and not dripped from somewhere higher above? A photo of the leaking area might help.

Link to post
Share on other sites
  • Moderators

Have to agree with Duncan on this one; in all the years we have been working on these engine's, I have never seen one of the MLS head gaskets fail, simply because the head gasket is stronger than the cylinder head it self.

Link to post
Share on other sites

Self-sealing coolant leak on an M96?? That's even rarer than an M96 head gasket failure. I think a bit more diagnostic work is in order before you go dropping the engine or selling the car. Has the coolant level dropped? Is there any oil in the coolant? How about coolant in the oil? 

Your real question was, "is it ever worthwhile (financially) to grin and bear this repair bill, sell the car, or take some other path?"

996 C4S is likely worth between $28-32,000. Replacing the head gaskets is going to be minimum $4,000, but because there are so many "while you are in there" jobs, (AOS, clutch, RMS, rebuild lifters, fuel injectors, assorted sensors, broken exhaust studs, etc) it could easily go to $8,000 or more.  

Link to post
Share on other sites
On 6/22/2017 at 7:57 PM, gnetwerker said:

I took my C4S (about 85k miles) into the shop the other day, and my mechanic noted that there was some (not a lot) coolant weeping from the head gasket.  He said it would probably self-seal, but suggested that I might want to look toward upgrading to a 997.2 or a 991.  Any commentary on whether it is ever worthwhile (financially) to grin and bear this repair bill, sell the car, or take some other path?

Get thee to a different shop...:closedeyes:

Link to post
Share on other sites

OK, thanks for the input, I'll explore this further.  The coolant level in the tank dropped severely.  Don't (yet) know if there is any coolant in the oil or vice versa -- that's the next thing to look at.

 

I trust this mechanic, but I'll talk to them again about it and explore some more.

 

Being able to say to the SO that I **really** need to upgrade to a 991 had a certain amount of native appeal, however.  OTOH, manual transmission 991 C4S Cabs are as scarce as hen's teeth.

 

Link to post
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.