No special tools. The solenoid is plugged in and sludge can result in it being seized. Try to slowly twist it to and fro and spray some WD-40 around it. Carb cleaner might be better to help loosen the sludge as it can penetrate better but it dries up fast as well.
Spray the carb cleaner into the filter area to help clean it and also the cleaner would be able to loosen the sludge internally.
Usually when this occurs, the likelyhood of taking out the solenoid intact is slim.
Btw any fault with the solenoid can result in slight rattling noise when engine is running, do you have this noise problem?
Saturday, September 1st, 2012 AT 6:16 PM