Description Thermostat Cap that bolts to the housing, also used on OM603 water pump upgrade. The parts below are required to complete the upgrade:Water Pump - OM606Water Drain Pipe - OM603/OM606Water Pump Housing - OM606Thermostat - OM603/OM606 - 80���������Water Pump Housing Gasket - OM606Water Pump Pulley - OM606
