89 911 Oil Over Fill

[D200]

I'm looking at buying an 89 911, exc. condition, other than the owner over filled the oil during a change. The car idles and runs well, but does not seem to hold much oil without burning it up. When the car is hot, the oil level on the dip stick is well below the low mark, which is also consistent with the gauge in the car. When we add oil, it burns it up and you can see the white smoke. Any ideas on what would need fixing? The engine seems to run very well, other than it can't hold oil!

Rick

[Washtech]

Probably blew out the seal on the valve guides. Put them back in problem will go away. Been there.

[tshih]

Guys,
The oil gauge is not meaningful unless the engine is idling at 900 rpm and the oil is warmed up to operating temperature and the car is on level ground. That is when the dip stick reading should have oil level just slightly over the low mark. The 911 engine has a drysump oiling system that takes about 10 quarts of oil with a filter change. Over-filling is not good for the engine's seals and there will be a breather hose that will spurt oil out over the top of the engine. The oil will also gum up the air flow sensor if you really overdo it. get a professional porsche tech to do a pre-purchase inspection for $100-200 money well spent to assess true condition of engine and car. If you take a reading of the dip stick any other way except as I posted above you will not get the correct reading of oil level in your 911.