Gas in the Oil, 5KCST

[Ameer Antar]

I'd check to see that the injectors aren't leaking. The sound is the fuel 
pump. You should jumper the f.pump relay and pull out each injector to see 
if any fuel comes out [car/ign. off, f.pump on]. Also you could have a 
problem w/ a leaky cold start valve. Remove the valve from the back of the 
manifold but leave the fuel line connected. Turn the ign. key to ON, and 
check for any leaks. Also a really rich mixture could cause fuel wash on 
the cylinders. But this would make the car noticeably less powerful.

I bet it's just a leaky injector pouring fuel into the cylinders when the 
engine shuts off and ends up in the oil, and you mention a lot short trips. 
A residual fuel pressure test would tell you a lot about the fuel system 
including leaky injectors, but you need a fuel pressure gauge. Be careful, 
cuz fuel in oil means more cylinder wear. The gas sort of dissolves the 
oil...gas is a solvent...good luck.

-ameer


At 02:54 PM 1/29/2001 , you wrote:



>  I looked up this problem,- gas in the oil, in the archive, and it was
>discussed three years ago but it didn't have an answer.  My symptom are very
>similar to the lister in 1997.  Like the lister in 1997, I had recently
>changed the oil and filter, drove the car often short distances, and found
>gas in the oil.
>
>  I also noticed that when the ignition was turned part way on, a small motor
>was running.  Trying to trace the sound, I believe it was coming from the
>fuel pump running continuosly.  I first smelled gas then.
>
>Then the car wouldn't start.  I started checking all sorts of things and
>eventually found that the oil was too high, and when I drained it, too two
>many quarts drained out.  The oil was mixed with gasoline.
>
>Is this very dangerous?  What should I look for?
>
>
>Here what was said aobout this type of problem three years ago,
>
>Audi Gurus:
>I just changed the oil and filter in the 88 5KCST.  I drive it one mile each
>way to work.  After driving a week, the oil level is above the full mark,
>watery thin, and smelling like gas.  Oil sample goes for analysis and guess
>what; they call saying there is gas in the oil.  My quess is the injector(s)
>are remaining open after shutdown and fuel is running into the cylinders and
>eventually past the rings.  Help. I figure I can test the injectors easy
>enough, but before I tear into it ...any other ideas or wise experience out
>there?
>
>TIA,
>Carmen
>88 5KCST
>my other car is AWD
>
>Reply
>
> >My quess is the injector(s) are remaining open after shutdown and fuel is
> >running into the cylinders and eventually past the rings. Help. I figure I
>can >test the injectors easy enough, but before I tear into it ...any other
>ideas >or wise experience out there?
>Just drive it and get it fully warmed up (oil temp, not just coolant),
>there is nothing wrong with the injectors. If you are going to keep driving
>it 2 miles a day you will have a lot more trouble: rings, bearings,
>muffler, seals, and many many more
>how about walking to work?
>Avi Meron
>