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)

"It looks like it's my turn" follow up


Recommended Posts

Earlier this month I posted:

A few weeks ago, our 02 Cab started losing a bit coolant. At first I thought that I had one of the common leaks or just needed a new coolant tank cap. No such luck. Now, on cool starts, I’m seeing an obvious plum of vapor coming from only the left exhaust pipe. There’s no sign of intermix of either type and no CEL though.

With any other car, I would be thinking "head gasket" but Jake Raby of LN engineering has said on the Rennlist Forum that it is never the case.

Does this sound like a cracked head or can it be anything else? The car has nearly 90K miles on it but has recently had the IMS retrofit and other preventive work done so it would be a real shame to have to replace the engine.

To follow up:

I had my engine's cooling system pressure tested and the engine bore scoped. Bad news! They found cracks in #4and #5 cylinder walls. I thought cylinder cracking was only a problem in the early 996. Now I find that that's not so and my mark II engine is not immune. Apparently the M96 engine block has issues with torsional rigidity and overtime can crack cylinder walls. Unfortunately, unlike the air cooled cars, the M96 has cylinders that are integral with the block and can't be just popped on and off. So, I have a major problem.

I see only two remedies; either replace the engine in total or have it torn down and its cylinders resleeved. Needless to say, either is expensive

Why this happened to our car is a mystery. It's a much loved and maintained Tiptronic "daily driver"and its engine never unduly stressed in any way. I guess its just another of those 996 zingers and like I said before, it looks like it's my turn.

Link to comment
Share on other sites

We had an 03 S come in with a cylinder liner failure last summer --

Sent engine off to LN Engineering (actually Millenium Technologies does the work) and had it bored out to 3.8L.

Stout engine -- but the rebuild isn't cheap as the Nickies (ring and pistons) will set you back 4K themselves.

I've read there are one or two places in England that are doing something similar. H something (slipped my mind) and Autofarm?

m

post-34429-0-23251900-1348208783_thumb.j

post-34429-0-49143100-1348208807_thumb.j

post-34429-0-83366500-1348208860_thumb.j

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
×
×
  • 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.