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Change to M73 (archive)
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Posted by Tyrone on June 18, 2001 at 23:12:34:

In Reply to: Re: E38 is 5.4L posted by Big-T on June 18, 2001 at 06:59:40:

I'm not sure if this was the only thing, but it's all I could find. Beginning in MY '99 the M73 engine adopted electrically heated exhaust catalytic converters to help meet LEV standards. The catalysts are heated at engine start up, and the heaters then switch off after a maximum period of thirty seconds.
The cooling system also changed, but this was not exclusive to the M73 (M62 as well, maybe others outside of US). The new components consist of a new radiator, coolant expansion tank, transmission fluid heat exchanger, DME controlled coolant thermostat and auxiliary fan. Ah, yes, and a new water-cooled generator


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