Posted this on peach as well. This applies to the years in which the tach pickup(speed sensor) is on the crankshaft up until some time in early '84.
I had read the factory/advertised method of changing the crankshaft pickup/speed sensor for my tachometer which involved removing the upper radiator hose, radiator fan, fan shroud, alternator belt, water pump belt, and the water pump pulley to access an 8mm nut. From the DIY article: "Due to the location of the sensor behind the water pump...
Replace Tach Pickup/Crank Sensor in 10 Minutes - W123 thru early '84
I had read the factory/advertised method of changing the crankshaft pickup/speed sensor for my tachometer which involved removing the upper radiator hose, radiator fan, fan shroud, alternator belt, water pump belt, and the water pump pulley to access an 8mm nut. From the DIY article: "Due to the location of the sensor behind the water pump...
Replace Tach Pickup/Crank Sensor in 10 Minutes - W123 thru early '84
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