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I recently bought a 1990 740 GLE Wagon, manual M46 transmission, with 317,000 km on it and in great shape. This has the 16V B234F engine, as you most likely already know. This is quite a sweet engine - and yes, I will be religious about replacing the timing belt at 80k intervals. As I understand it, this engine was produced in 89 and 90 only. Why was that? The B230 is rugged but underpowered. The Turbo is nice but it is expensive if it breaks - as is the 16V no doubt. It is hard to tell from the stories on the net if the 16V is more or less reliable than the Turbo so I don't know if relative reliability was the reason for dropping the engine. Was it a marketing issue? A cost issue? Seems strange to go to the trouble to design such a sweet engine and drop it after just 2 years.
Bill
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