I have been following all of the = engine swap options, and have just about decided to stick with the Waterboxer for my = 90 Carat. If I want a newly rebuilt motor, I can probably get it done = for about $3k, assuming about $800 removal and replacement of the old one, = and a new waterpump. The Eurospec I4 is what I was saving for, but it costs = twice as much as the WBX -- no matter how I look at it. The 5 cyl is $4500 = with the rebuilt motor, and I would have to still find the FI system from a donor = car, and then pay for the removal and replacement. The TDI is the most desirable option, but it is too expensive and still too much of a = science project. While I agree that a new I4 or a rebuilt I5 will last = more than twice as long as a new WBX, I don't have twice as much money now to make = the investment. I also have no time, no machine shop, no patience, and = no mechanical talent. My present waterdripper is starting to leak = more than 1 drop / second while the engine is running, and I don't know how much = time I have before it catastophically blows. If I do get another waterboxer, I = promise to change the coolant every 2 years.