Hello, JGolf here. I am a newcomer to the forum. My vehicle is a 2005 Golf 1.9 BEW automatic, newly purchased, 192000 miles. Previously owned a 2009 Jetta TDI. Live in Greenville NC. I apologize for the length of my post. I loved my last TDI and want this one to be as reliable as my Jetta was. My history with the Golf has been trying to say the least. When I bought the Golf from a local private party the timing chain, water pump, fuel filter, oil filter, air filter had all been newly installed with no engine light on and a clean report on the VCDS. Within 200 miles of in town driving there was sudden extreme smoking with loss of power, the oil dipstick showed extreme overfilling and there was diesel in the oil. Towed it home, replaced the Tandem pump, oil and oil filter and MAF sensor and it was running again for a few days. The Golf stopped suddenly at an intersection and would not restart, cranked over but would not catch. Towed the car home again. No sound from the lift pump when the key was turned so replaced the lift pump and it was running again. There was dark sooty looking diesel at first as I drained the diesel from the tank through the supply line by pressurizing the return line to the tank at the fuel filter. The engine started right off with no excess smoking and was running well. I began to hear a medium pitch whirring sound as I was driving the car that was not apparent on revving the engine. Sounded like maybe a vacuum leak/ gear whine sound. The car was accelerating well, easy to start and was preparing to purchase a VCDS to check out the car and clear the error codes. On a short drive in town there was a sudden burst of white smoke out of the car with rapid loss of power. Pulled off the road, opened the hood, checked the engine and the oil dipstick had blown oil over the front of the engine. Towed the car home again, now on first name basis with tow driver. On inspection at home there was an oil level just above the bottom mark, no visible oil in the coolant, the oil filler cap was clean oil with no milky substance, the oil cap when loosened on the valve cover would dance about so it seemed there was excess pressure in the head. Boost pressure leak with a homemade tester ( as outlined in this GREAT forum) indicated there was no major leak; Turbo Actuator was functional; N75 valve was bad and replaced; no visible oil leak at rear of engine. I filled car with a little more engine oil to mid fill level and restarted the engine. Immediately there was white smoke coming from the engine compartment, however the engine would start easily and run roughly at idle. I stopped the engine and checked the oil dipstick and oil fill cap. This time there was a little bit of coolant mixing with the oil showing. There also was a small bit of sooty looking drops in the bottom of the coolant reservoir. At present I am preparing to replace the head gasket and check the head, valves, etc. My questions are: Am I correct in assessing this as a blown head gasket? is there any additional mechanical maintenance I should consider while performing this? What could have happened to cause the head gasket failure? The engine did not overheat or show signs of stress before this. I have read the excellent DIY sections on the head gasket repair. Could the head gasket have suddenly failed without warning? I am unsure of the history of the vehicle before I bought it from the private party. Thank you for your help!