Ive an audi a4 1.8t 2001 model and engine code is avj and head gasket went on it a few months ago. I sent it into a garage here locally to look after it, they fixed it up again with a new gasket kit etc.. but never got the head pressure tested and in a matter of weeks the car was in worse state because the head was cracked. He told me the reason why he didnt get it tested is that where he gets them skimmed, he was told theres no need because they never crack . Ive been trying to get a new head or engine for few months now and have been told that they are impossible to get and anyone who has been breaking same car, have had same problems as me. The garage looking after my car tried to fit an A6 1.8t engine into it but it wouldnt fit(forget reasons why it wouldnt) but they have took the head off and fitted it onto mine as its a straight fit apart from the egr. HE showed me exactly what was different and on the avj engine(mine) theres a hole running into it right behind the egr thou when he stuck a camera down it, the hole didnt really go anywhere or conected to anything. On the A6 head the egr doesnt have the hole behind it running into the engine thou its an exact fit so hes put this head in to see if itll work. Is there anyone on here who knows anything about this. I am not familuar with cars so thought id pop in here to see if this can be done because i wouldnt want this to be fitted and a few weeks/months down the line the engine seizes. I dont even know what an egr is or what it does so can anyone on here confirm would this be a major problem for my car.