I bought an Audi 80 with ABT engine about 2 months ago. Various things about it were renewed (crossbar bushings and other Audi wear parts… you’ll already know what I mean 😉 ) A “problem” still has the box: the engine sounds like n diesel. At first it was particularly bad, since it clacked both in warm and cold conditions. I set the ignition angle a few days ago, now it pulls significantly better and the clacking is also away in the warm condition, but when it is cold in the morning, it still rattles like a sewing machine. I have to say that it only rattles when you give gas. As soon as I walk away from the gas, it is gone. Even in idle (unloaded) nothing to hear. Exchanged at the engine: – Lambdasonde (was already full in the ass… engine went out after about 2 minutes) – both cracks incl. seals – the entire cooling system (pumps, hoses etc…) – candles – petrol hoses in the engine room – carburetor flange – oil (now is t 15W40 inside) – throttle dampers – etc…div. gaskets and other “small parts” Oh yes: The car is BJ. 92, km-Stand: 182000, with drum brakes at the rear and the throttle dampers with 4 connections (if that tells someone something) The hydros definitely can not be, that sounds different (the clacks also for about 2 sec. after starting).