Dear David,
thanks a lot for your very on point description of the possible solutions. This is most helpful.
The water pump and radiator core were already replaced before I started disassembling the engine, which led me to the initial thought of the radiator not being capable enough.
Since you mentioned the change from pusher to puller fans the old pusher units are my prime suspects. The fans turn suspiciously slow. When I got the car the wiring was in quite a sorry state with a negative earth conversion running a lot of things backwards, this including the fans which avoided airflow at all.
I'll run through the cables again. If they are fine I'll also consider changing to puller units. If I change them, would you mind if I consult you for some more details on your conversion?
Have a great weekend,
Justus
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