Quote:
Originally Posted by Qsilver7
Ditto upallnight..the variable speed aux fan used after 9/1998-up (like in the M54/M52TU/M62TU/M57/M57N/N62) is controlled by the ECU/ECM/DME which sends a PWM signal to the aux fan to turn on under specific circumstances (approx 4-5 criteria).
The aux fan is not like the 2 & 3 stage aux fans used in earlier BMW models with the M62/M52/M50/M30 engines.
And at start up...the aux fan will turn on briefly as a test for the DME to know that the aux fan is okay:
(here's more info about the variable speed aux fan)
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Good info here but,
To my knowledge, m52tu engines in E36/7 and E36/8 chassis still used the old fan system. BUT, these were "parts cars"
. On mine I have, E30 rear suspension, E36 front suspension, and an engine from an E46
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2001 E53 4.4 Alpine White, Sports Package
2000 E36/7 2.8 5 speed Bright Red w/ a HT!
