Hi everyone, its my first time posting here and i was hoping you guys can help me. I have a 2005 A4 2.0 Tdi that has never given me an ounce of trouble in the 5 years ive owned it, that is until i decided it was due a timing belt (90k miles) I enquired around and found a guy that came highly recommended to do the job. Once the job was done i noticed the front rhs indicator wasnt working and i reckoned he didnt reconnect the wire, so i tried to lift the bonnet to connect it myself and then i noticed the bonnet catch wire wasnt connected. I called him and he said hed sort it out, he took the car and said hed be back in 20 mins with the problem fixed . . . . . 4 hours later the car arrived back farting and spluttering, he said the EGR cooler blew on the way back so he returned to the workshop to fix it. He tried to MIG weld the cooler, but only managed to blow holes in it, then covered it in chemical metal trying in vain to block the hole. When i looked at the part it was covered in dents as if he was trying to lever against it. I bought a new EGR cooler off Audi and fitted it, but it seems to be blowing exhaust gas out of the top of it (also seems like its running on 3 cylinders) im wondering is the EGR valve stuck shut and not allowing the gas to circulate ?? Could some of the slag or snots of weld get sucked into the EGR valve or even into the engine ??? Any help at all would be greatly appreciated.