Hello together, I got a built-up VW Golf 2 diesel engine with 54 hp. According to the seller the engine ran until the removal. Before it was reinstalled, a friend prepared this engine. 2 new valves from my old engine were replaced with head seal damage in the used because these defects were according to my acquaintances. The valves were regrinded. Furthermore, he renewed the timing belt. The pistons all had no room for manoeuvre and all sat nicely tight. There were no bars in the running surface so that my acquaintance did not see any reason to replace them. For this reason they were not replaced. The cylinder head seal has also been immediately renewed in this train. The engine was installed and also jumped directly on. The engine runs without flashing noises or knocking, flaps etc. as he says impeccable. We have now determined that as soon as the engine comes to temperature, and at high speed is brought already over 2000 tours, oil at the measuring rod exit. In cold condition this can not happen even at high speed.