Hello everyone, I'm new to the site, can anyone help with some advice? I have bought a 1998 A4 1.9tdi Avant SE. the engine is a 110 AFN but has a blown head gasket I was advised that it could be a can of worms fixing the engine as it wasn't known how much heat had been put into it with the problem and the last owner also about same price to just change the engine. I got a replacement from a breaker but it turns out the replacement is actually an 90 AHU engine. The breaker won't replace the engine or give me a full refund as he says it's the same engine and that all I have to do is change the exhaust manifold and the turbo over from the old engine to make it the same. Is this true or not? from what I can find it doesn't seem to be the case. The breaker swears that this is corect and he has sold lots Any help would be much appreciated.