Good afternoon,
Please tell me this isn't main bearing time?
My TDI has developed a very loud knock from the lower end of the engine. The stethoscope suggests that it's nearer the water pump, than the crankshaft. Disco timing chest, defender induction system.
This sounds goes away once above tickover, gone under power. Oil change had no effect, but the oil was done August last year, so that shouldn't be an issue.
It's a loud knock, mechanical, I've attached a .wav file, audio, but I don't know if it helps.
Help?
My recording 1.wav