2016 W212 OM651 Thermostat / Waterpump Replacement (Guide / How To)
In its continued fashion, this car has been fighting against me and this time the thermostat housing has cracked and the water pump is leaking through the bearing. When I replaced the AC compressor, belt tensioner and drive belt I told myself the water pump would be next – maybe the new belt tensioner was too much for a water pump bearing that had covered 384,000 miles. Also replacing the header tank / coolant bottle and cap, as it’s getting old and I can no longer see the level very easily.
