Snagger Posted September 15, 2016 Share Posted September 15, 2016 Fridge, the rad is supposed to be cooled by the viscous fan, and that should be sufficient by itself even with an ac condenser in front if the ac is off. The condenser has two electric fans controlled automatically by a thermostatic switch in the thermostat housing on Tdis (the two blind holes int he top of the housing on 200s, and in the 180 degree elbow on 300s), and I think in the same location on V8s, boosting the airflow if the viscous fan isn't coping when the ac is on (more engine load plus warmer air going through rad due to the heat exchange in the condenser). The second hole in the thermostat housings ahs another thermostatic switch which disengages the ac compressor clutch if the temperature continues to rise with the electric fans on. So, with the ac off, the main fan should suffice. I think the rad is shagged or there simply isn't enough airflow through it because of an ineffective fan or a widespread blockage in the rad or condenser fins. Quote Link to comment Share on other sites More sharing options...
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