my 993 engine smoking

[markstephens]

Hello I have been busy rebuilding the bodywork of my 993 for the last 9 months but today I decided to take it for a blast up the road ( for the very first time )
I drove it for about half a mile and decided to give it sum, anyway to my horror in my rear view mirror all I could see was smoke , I switched off the engine and had a look too no avail so I drove it back home very slowly, the car was pumping out smoke, anyway I got home checked to see the problem and found oil running out on to the floor.
I stripped down the air filter and found oil in the filter and oil in the air flow sensor.
I then checked the oil which was very very full, I havent checked the oil level before dont ask my why because I know its a basic thing too check.
I cleaned up the oil on the engine that had overflowed and started the engine again to see if I could find the source of the problem, the engine stopped smoking and I could not find any leaks the engine ran almost normal a little lumpy.
I then undid the oil filler cap too find oil running out of the filler pipe?
Is the problem simply that the engine is overfull with oil or could it be something more sinister
Any advice would be appreciated.

 

[IndischRot]

Critical question - did you check the oil level with the engine running or switched off?

 

[markstephens]

The engine switched off for at least 10 mins giving time for it to settle
Oil still run out of the oil filler it was full to the top of the filler.
I cant imagine why anybody would fill to the top of the filler neck but my engine is that full
Im a aircooled novice this been my very first one so im open to any suggestions

 

[Graham-S]

Mark

Air cooled 911's you check the oil with the engine running and hot.
Normally 8 o'clock on the temp gauge the thermostat opens and the oil flows to the cooler at the front. You then let it tick over on idle for a few mins. Then you can check the level on the dip stick
I'm guessing you have over filled it from what you have said

Graham

 

[markstephens]

Thanks Graham
I didnt realize that you had to have the engine running but now I do and will check in the morning
Thanks Again
Mark

 

[T911UK]

Wow! oil at the top of the filler pipes means you have way too much oil in there, like 3 or 4 litres, maybe more. I would drop it all out, change the filters and clean all the residue up, this may involve removing all the intake though. It may take some time to get back to normal!

 

[markstephens]

Hello Maurice
I have not touched the oil as previously mentioned I have been busy with the bodywork.
I am only now working on the engine and suspension, the oil in the car was as i bought the car
I should have checked the level properly before driving it but I didnt, the car has been only driven on and off a trailer and in and out of the garage,cant understand why the previous owner would have overfilled it though.
I've cleaned the air mass sensor and the inlet pipes this morning and just ordered a complete filter kit and oil so I know its right!
I have checked the flexible pipe in the filler neck it looks fine.
Fingers crossed thats all it is
Thanks
Mark

 

[Chrissss81]

The smoke can have various reasons, but it seems that your car has too much oil.
I had a problem recently where one of the sealings at the engine failed and oil dropped on the heat exchanger next to the exhaust...

It was badly smoking, but luckily the sealing was easy to replace... but it was a shock when I saw it

 

[RM993turbo]

Most people run their cars on the half way mark on the dip-stick, and keep an eye on it. It seems to cause a multitude of issues for the Turbo in particular if there is too much oil. You've already been given great advice to drain it all and start again. Remember to get the right oil filter, due to the anti-drainback valve. This valve is surprisingly non-existent in the Mahle or MANN branded filters. Either of the aftermarket units will empty themselves of oil, which leaks back into the crankcase, seeps past the piston rings, and causes smoke on startup. The Porsche branded filter, alone among these three, will seal itself from any backward flow through the filter.

Hope that helps you!