Questions after a TB/Waterpump Change

[DBA4_1.8t]

I had an overheating issue recently and had come to the conclusion that my waterpump had died. So I ordered a timing belt/waterpump/thermostat kit from Euro Technik (AZ advertiser) for only 372 with 2 day shipping. I was planning on having a local mechanic do this for me but being a college student about to start a new year, I couldn't afford it (thanks to Colin for his help/advice anyways). So today I used the DIY and some luck to dive into a very tricky fix. In doing so, I encountered a few obstacles or rather just points of confusion. The DIY didn't mention removing the rest of the hoses from the radiator so I assumed from the picture that removing everything would be ok. I removed the larger hose to the turbo underneath, but above it were two hard lines that used 10mm bolts to fasten them to the radiator. I knew they weren't to the AC but when I removed them, a dark fluid came out of them not like an oil and there wasn't too much of it but I have no idea what it was. Also, I had a huge amount of oil on the front of the engine which I intially thought was my VCG but it seemed like more than what a VCG would normally leak. I just replaced it 4 days before my water pump went out due to this, but upon further inspection, most of the oil seems to be in the vicinity of the head gasket. I didn't find oil in my coolant and I never have any visible exhaust so I don't know if it could just be going bad without the usual symptoms or if in fact my valve cover gasket did leak that much oil. Last thing, I ran out of time/daylight to finish everything and I would just like to know how most people mixed their coolant. I remember reading somewhere it is a 70/30 mix, and I have 2 bottles of g12. Am I going to need both bottles plus 30% water? I figured I would premix it and fill accordingly but does running the motor after a fill change the level? And is the only way of avoiding air pockets to use the breather screw on top of the engine? Anyways, sorry for the long post but it was a very long day trying to get all of this done (7hrs, I know I am slow). So far everyone's advice has been great.
Thanks

[FourRings80]

Most people use 50% water / 50% g12. But some living in warm areas use 70% water/ 30% g12. It is also recommended to use distilled water when refilling the coolant. If you go the 50/50 route you will use about 4 liters ( 1gallon ) of each. when I did mine, I filled up the coolent reservoir a little over the max mark and let the engine run a few minutes. Then loosen the cap on the coolant reservoir (careful hot) and air pockets came up. Refilled a little and good to go.

Or you can (on a cold engine)open the coolant reservoir. Then open bleed screw on the hard line and let the air out.

[DBA4_1.8t]

I got two 1.5 liter bottles of G12 with my kit, am I going to need more? Also, does anyone have any idea of what the two hard lines on the back of the radiator are? I hope they weren't power steering lines or anything. I have some pics of the oil leak that I'll post up later.

[ttay1977]

Your two bottles of G12 will be enough.
The 2 hard lines you are asking about should be coming from your automatic transmission. If that's the case, you'll need to make sure to check the DIY about filling the tranny oil. I just did mine and swung the radiator in the opposite direction as the DIY. I had to disconnect the power steering hoses. It's much easier to fill that than the tranny fluid. Good luck.

[DBA4_1.8t]

I have everything back together and it seems to be working properly (no codes). Is there any way to check the tranny fluid level? I probably lost about 8-12oz of fluid when I removed those lines. Plus the fluid seemed pretty nasty like an old oil but thinner. Should I be trying to flush that soon? I haven't seen an interval for tranny fluid on this car so I'm not sure if it's even necessary, but I am assuming it is. Anyways, thanks for the help.

[ttay1977]

There isn't a dipstick or easy way to check the level. Just read the link below and you'll understand. I don't remember if there is a DIY on this forum for tranny oil change but you can use this
http://www.taligentx.com/passat/maintenance/atfchange/
There's a lot of discussion in the forum on when and what type of oil to use.