Hello everyone, I hope I’m right here. My name is Peter and I’ve had a GMC pick-up for about 15 years with the 6.2 diesel Bj.84. 8years ago I retrofitted a bench turbocharger, otherwise the engine is still original. Has never let me down since, except cover parts such as starter light mesh and water pump. Last year I had a defective head seal and then changed both. With heads plan valves and some new pre-burning chambers. The car ran like a clockwork again. I just registered because I have the following problem. Since a holiday in Denmark the engine is no longer running round, makes the impression as if only seven pöttes run. When I give gas it is not so audible anymore. When driving you notice a little the power loss and at lower speeds the whole engine “shakes” itself. In the cold condition also a dull knock can be heard. In a Wekstatt they meant crankshaft bearings defective. But from now on geich??? And the diesel always sounds a little “rapid”. Oil pressure is full there, engine starts well and also takes good gas. I haven’t driven since. (In winter I don’t drive, so the car was standing for quite a long time.) Does anyone have an idea? Greeting Peter