Hi. I am new to this forum. I own a Audi A4 B6 2002 with a AVJ engine. Seems to me there is a pipe coming from either the head or block not sure goes to the pcv valve and then to the top of my engine. The pipe coming from the block has cracked. Spoke to my mechanic and he said the engine has no compression and needs to be changed. Has anyone encountered this problem and know if i can fix this without replacing. Thanks in advance.