The 200 Tdi that I bought from RN has had 1500 miles on it scince I bought it. there is now a oil like liquid leaking fron the head gasket on the vacum pump side (passenger side). Are there common problems here, is this normal, it only happens after the motor has heated up which by the way takes forever. The engine running cold does't seem like a bad thing to me, but I thought I would mention it. The one cause of this problem could have been from the over filling of the resovoir tank leaving no room for the expansion of rthe coolant. the tank doesn't have a pressure release for some reason, could the coolant expanding have caused this, if so, ill just do a head gasket, and it will be done wit hopefully. the engine is by the way fit into a IIA 109, It is a great replacment and was fairly easy to install. feel free to ask if your interested in doing this yourself, there are a number of modifications that make this 109 very unique.