Hello
Just a couple of question to help me understand. First is this a turbo 4 cyl? Is it a ESi or TSi or standard Talaon?
Next, the car has 133,000 miles on it. It is possible you are not getting good circulation. Has the water pump ever been changed? Are the cooling fans turning? Are the heater hoses going into and coming out of the firewall hot?
Blue smoke out the exhaust is a sign it is burning oil. This could be due to the valve seals, piston rings in the worst case.
As for it coming out the AC vents, have you looked really good to see if you have a exhaust leak under the car or in the engine compartment that is being drawn into the outside vents to the inside of the car?
Air in the system will also keep heat from getting to the core and not allow the car to heat up properly.
Has the radiator cap ever been changed?
If you can provide me with this info I will be able to assist you better.
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Sunday, November 2nd, 2008 AT 7:58 PM