At Push-in Some Volvo radiators (including some ofthe Nissens radiators offered by WORLDPAC) have changed from a push-in type fan switch to a threaded-type switch. If a threaded-type switch is required use #823 959 481F (92°-87°C), 175 959 481 (94°-90°C), or 251 959 481 (102°-97°C) in place of the original switch and rubber bushing. -