You could just bolt a 240D fan on there, or bolt the existing fan without the clutch, if either of those would work, then just take it of in winter like the truckers do. slightly inefficient, but gets the job done, and won't just stop working again like a clutch could. The Clutch is definitely the most efficient when its working, but there's something to be said for the dependability of a bolt on fan.

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83 240D four bagger stick diesel 276K