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Old 06-14-2017, 05:07 PM
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Join Date: Nov 2014
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fan blade

On my 1983 300d turbo, I have the 6-blade metal fan. I know they changed the design to the 11 blade plastic fan. Is there a big difference? Less drag? Quieter operation? Less susceptible to failure? Is having the original 6 blade metal fan a sought after part? Should I replace it? My car runs fine, doesn't overheat, but don't know if my engine needs it?

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Old 06-14-2017, 07:11 PM
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Join Date: Dec 2006
Posts: 2,762
There's some marginal improvement to be had by lightening the fan, but these motors rev too low for it to be noticeable. I turned the fan from my old 300CD into a Martha Stewart project:

An idea for all the old 123 Fans out there (literally)
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