How can I repair a small leak the radiator and is my fan belt drive or electric on 1993 BMW 740i

My car out of the blue starting running hot

1 answer
Given the fact that your radiator plays such an important roll in keeping the engine/transmission oil properly cooled. I would NOT repair radiator. I would replace it. Worst case scenario (engine failure) is too expensive to attempt to save on a radiator cost replacement. Your vehicle has both mechanical hydraulic fan clutch (main engine cooling fan) & an electrical auxiliary fan that works w/ air conditioning and as a secondary back up cooling fan if primary were to fail. Good luck.