Not getting much love in the 2.0T forum... maybe you guys can help.
I have a 06 A3 2.0T 6MT. I took in in due to a flashing check engine light on a cold start a few days ago. I thought it would be the flapper valve and fixed under warranty.... It was not. The codes were for misfires on Cylinders 1 and 4. Tech also stated those were running lean based on his look at the spark plugs.
Tech also showed me a cracked intake housing (edit: cracked airbox housing) near the right front of the motor... Said that might be the cause of the misfires/lean contition due to unmetered air. I pointed out that the air would be unfiltered, but not unmetered, and he agreed.
Then he tells me my brake pads are low, which I knew.
Then he unscrews the coolant resivoir and shows me oil mixed in with the coolant. Being that the timing belt was replaced 7K ago, and the T stat about 3 K ago, I had not heard about this from my mechanic. BUT, it definately looks like oil in the coolant. He said it could be the oil cooler, trans cooler (I don't think there is one on a 6MT) or a blown headgasket.
Being that I was now stuck with $140 bill on the engine diagnosis alone, I asked him to button up the motor. They want $200 MORE to diagnose the oil in the coolant. So thwey buttoned it up and sent me on my way.
SO... how serious is the situation here, and how can I diagnose this issue myself? Can I? Or should I take it to a regular mechanic. Has anyone done a headgasket on one of these? Should I even need a headgasket after just 82K miles and not even driving it hard or being modded? OR is this just another thing that just goes wrong with these cars?