If you have any trouble codes; please post them here.
For the timing belt job; best to buy a whole kit with the waterpump and all the other parts that are on the timing belt path. I have been using FCPEURO.com lately for my VW parts and they sell high quality oem parts, fast free shipping, lifetime warranty and excellent customer service. The timing belt job is not very hard; the first time, is a bit more time consuming but if you are mechanically inclined, definitely doable.
Coolant leaks are very common; some tough to find, in that case, I use a cooling system pressure tester and that makes pinpointing them easier. I use one from HF but there are others out there as well (this has adapter for all vehicles; so, useful to work on anything you have):
PITTSBURGH AUTOMOTIVE Radiator Pressure Tester Kit
www.harborfreight.com
When, the waterpump wears out; it will leak coolant, possibly make a whining noise and it will get worse, as time goes on. The leak, will be on the passenger side and come out from under the harmonic balancer and typically, is pretty obvious. If it is leaking, I would address the repair right away; the waterpump, is driven by the timing belt and so, if the bearing causes a catastrophic failure, the timing belt will fail and bend valves in the head.
If you end up repairing your cooling system; you might consider, replacing many of the failure prone plastic cooling flanges with aftermarket cast aluminum versions, which won't fail again.
For leaks from the roof into the car; you might first check the drains and make sure they are not clogged.
On the 2.0L oil leaks; the valve cover gasket is common and then, the oil cooler seal, is rubber which gets hard and this leaks at the front of the engine.
For the timing belt job; best to buy a whole kit with the waterpump and all the other parts that are on the timing belt path. I have been using FCPEURO.com lately for my VW parts and they sell high quality oem parts, fast free shipping, lifetime warranty and excellent customer service. The timing belt job is not very hard; the first time, is a bit more time consuming but if you are mechanically inclined, definitely doable.
Coolant leaks are very common; some tough to find, in that case, I use a cooling system pressure tester and that makes pinpointing them easier. I use one from HF but there are others out there as well (this has adapter for all vehicles; so, useful to work on anything you have):
PITTSBURGH AUTOMOTIVE Radiator Pressure Tester Kit

Radiator Pressure Tester Kit
Amazing deals on this Radiator Pressure Tester Kit at Harbor Freight. Quality tools & low prices.
When, the waterpump wears out; it will leak coolant, possibly make a whining noise and it will get worse, as time goes on. The leak, will be on the passenger side and come out from under the harmonic balancer and typically, is pretty obvious. If it is leaking, I would address the repair right away; the waterpump, is driven by the timing belt and so, if the bearing causes a catastrophic failure, the timing belt will fail and bend valves in the head.
If you end up repairing your cooling system; you might consider, replacing many of the failure prone plastic cooling flanges with aftermarket cast aluminum versions, which won't fail again.
For leaks from the roof into the car; you might first check the drains and make sure they are not clogged.
On the 2.0L oil leaks; the valve cover gasket is common and then, the oil cooler seal, is rubber which gets hard and this leaks at the front of the engine.