I got a crack in the top tank of my radiator last night. I have used the search tools and found out a few things, but the following questions I have I have not found an answer for: 1. The crack happened last night on a cool night and was not boosting at all. Should I be concerned there is a failure somewhere else in the cooling system, which has led to the crack? Or given the car is 15 years old, it was just a matter of time? 2. Do standard vr4 radiators have plastic top and bottom tanks? 3. Is it possible to have a professional to plastic weld these? 4. Can the top tank be replaced? If so, where do you get a replacement tank? And how does it come off? 5. I have been recommended to buy a Golpher Radiator off ebay. The seller on there doesnt seem to have any stock. Anywhere else I could get one of these in Adelaide? 6. Is the golpher radiator a straight swap for a standard one? I dont want to muck around modifying things. 7. This one looks pretty good (http://www.ebay.com.au/itm/RADIATOR-FOR-MITSUBISHI-LEGNUM-VR4-Log in to view-AUTO-HIGH-QUALITY-/161767504856?hash=item25aa183bd8), is half the price of the Golpher, and says its a direct replacement. Anyone else bought this one? FYI not planning on keeping the car for another 10 years, so the replacement doesnt have to last forever. And obviously want to keep the costs as minimal as possible!