Hello I bought myself an Audi 90 20V (MKB: 7A) yesterday. First registration 04.1991. 5-speed, front drive. The engine has already over 260 000 km down. Now it only starts with a lot of gas and does not start properly (the engine fibrates easily). But in the stationary gas it actually runs at constant speed, it just fibrates a bit. An oil change has probably not been done for a long time, since it is totally black and the painting of the oil filter is also completely “road rusted”. The oil level with the oil measuring rod was not detectable anymore!!! So I first made an oil change (but without a filter). So get to work and see what it is that the engine has such a mute. At first I thought that maybe the engine has a light screw, but the oil pressure was there… . I looked at the engine, and I noticed that it sucks quite nicely behind the 5th cylinder. Besides, the engine could run a light air outlet solidest during If you have held your hand behind the 5th cylinder (over the flywheel) about the height of the cylinder head gasket, where it is powerfully sucking. Could that be the head gasket? So I guess it’s pretty strong (especially since the original owner suspected it too). The cooling water is OK, but the oil smells like gasoline. Oh yes, and when the engine is running it always makes the pfff pfff pfff. And if you give a sudden gas, then it’s so weird.. So I hope it’s the K opf gasket and not an eating flask or a mechanical defect (especially at mileage). So what do you think?? mfg steftn