esam1152

HELP HELP HELP. Novice 996 owner just got the kick in the ******* call from mechanic.........oil in coolant, coolant in oil. Auto is currently at Eruopean performance in Raleigh [by fairgrounds]. I need any and all information folks have concerning options. Initial estimates for work are very high. Auto is a 2000 996 with I believe a 3.4 L.

Thanks

Ed S

Gator996

Damn, so sorry to hear this. My first call would be to Flat 6 Innovations for a phone consult. Jake can certainly tell you what your best options are.

Macster

While I have no direct experience with Porsche engine rebuilds, generally an engine rebuild is an expensive job. It can be extremely expensive if the wrong shop is chosen to do the job.

IIRC the 2000 MY cars came with a 3.6L engine.

If not, if the engine is a 3.4l engine, well of course you can replace the engine with a 3.4L sourced from another car. The risk is the replacement engine could be sick. Ideally you and your best mechanic would want to hear the engine run before you buy it.

You can install a larger (3.6L) engine. You could still get a bad engine. Also, there are some issues with installing an engine from a newer MY into an older MY car but the issues have all been resolved Imm sure.

Mark I

Search terms: intermix, AOS, cracked head. With some luck, Doug/Dharn55 will impart some words of wisdom from his experience. GL with solution.

targa996

How many miles on engine ? How often was oil changed ? While there are a few possible causes here .. Search d-chunk. Seems to be a problem on some 3.4l engines due to weakness induced in casting process. Temp cycling the metal will eventually cause big crack. New engine is probably on the order of 16-20k .. At that point the car may not be worth much more. You could try and find a wreck where the engine is good .. But even that is probably 8k plus and the 3.4 can still be susceptible to the same problems. Some said early '99 motors were cast in different factory and didn't have same issue .. Not sure about rebuild options .. But yes talk to flat six.

Not sure what the car is worth without e fine .. But sat $5k .. You might consider just upgrading to a 2002 -2004 with ims done ... Probably similar cost to a rebuild ...

Good luck .. Hopefully this is not the worst case scenario

nick49

Happened to my '99 C2, @ 4 years out of warranty. With lots of work, persistence and help from the dealer Porsche NA good willed a new updated motor. I paid for coolant and the dealer's labor to install.

Your options are a fairly expensive repair, chancing on a used motor install, a new reman motor from a P dealer if still available but very expensive.

GL

dgk996

Send it to Flat 6 Innovations. Stay away from your local Porsche dealership. They know **** about these engines. I'm experiencing the same issue you are with my '99 911 and sending it there.

infrasilver

The intermix issue could be something as simple as the engine oil cooler corroded and allowing the two liquids to mix. Fingers crossed its something simple but more often than not its going to cost.

A 3.6 engine option may not be compatible swap from a 3.4 due to E-Gas depending on year.

Cosmo Kramer

If both the coolant and the oil have intermix I would get a leakdown test done and the AOS checked first.

infrasilver

There's no coolant in the Air/Oil Separator.

Gonzo911

There is coolant in the AOS.

KrazyK

Infra, just to clarify, they are referring to the oil vapor separator (which has coolant flow) on the top left rear of engine not the AOS system in the sump. The "AOS" acronym is sometimes used to refer to either system.

insite

what were the symptoms that had you take the car to the shop

Gonzo911

A year ago, I had a major coolant leak. Thought it was the water pump. It was the AOS.

KrazyK

Hopefully just this.