I was hoping someone could chime in, and give me some direction of hope. I've had nothing but European cars, so I usually know my way around them pretty good. But this 1 has me completely stumped. Long story short - I bought this 2011 Tiguan 2.0T TSI 4 motion Not running, already knew timing chain failure. So I had head checked 1st. Pressure and straight / level. So far through my journey with this I've put in New - 8 intake & 8 exhaust valves with new seals. Every gasket. Pulled oil pan to clean and reseal. Replaced all 3 chains, guides & tensioners. Water pump, thermostat (twice), belt & drive pulley. Intake. Cam & Crank sensors. Oil cooler. Waste gate control valve N75 which I broke. VVT valve & Magnet. Oil separator. And your normal routine maintenance.
Now to the problem, I'm having - sort of overheating issues, you can say. Idling in garage, as if you were bleeding out air of cooling system with heater on. It all functions as supposed to. Gets up to temperature, radiator gets hot after thermostat opens, then fans kick on. And so on, I let it run 4 fan cycles and thought all was good. Until I drove it. After a few miles, on take off from a stop sign I heard the chains rattling. So I went straight home and checked it out. Radiator was cold & fans running. Checked temps with VCDS and clearly thermostat should of been open, 218F coolant, 82F outlet temp and oil temperature was at 256F.
From my experimenting, It all operates normal if you run the heater, within 5 minutes of shutting heater off, the coolant level rises in jug, no bubbling - fans kick on - radiator is cold, but according to my VCDS readouts thermostat should be open.
Now to the problem, I'm having - sort of overheating issues, you can say. Idling in garage, as if you were bleeding out air of cooling system with heater on. It all functions as supposed to. Gets up to temperature, radiator gets hot after thermostat opens, then fans kick on. And so on, I let it run 4 fan cycles and thought all was good. Until I drove it. After a few miles, on take off from a stop sign I heard the chains rattling. So I went straight home and checked it out. Radiator was cold & fans running. Checked temps with VCDS and clearly thermostat should of been open, 218F coolant, 82F outlet temp and oil temperature was at 256F.
From my experimenting, It all operates normal if you run the heater, within 5 minutes of shutting heater off, the coolant level rises in jug, no bubbling - fans kick on - radiator is cold, but according to my VCDS readouts thermostat should be open.