Not all otterstadts are created equal. When I first installed a Fanzilla it didn't seem to come on right and took too long for it to go off. Rob Grady said I should replace the otterstadt with a new one from him, his works better with his thermostats and Fanzilla. Always replace the seal with the otterstadt and if the clip is missing it is alright to just use a strap-tie. NEVER put anything on the seal except anti-freeze. I thought I was smart and used some silicone. It failed soon after. I can't speak to how well John H's parts work, I only have experience with these parts from Rob. If you have to continually bleed the system and you get air out you have a leak somewhere and the system will never run right. If the radiator is half full of air (an exaggeration) then it can only work at 50% efficiency. Even with the auto bleeder that you can install on the fitting by the thermostat it can't get all the air out of the radiator. A "tight" system only needs to be bled once (when you initially fill it). Another possability is that the car was overheated and you have a blown head gasket putting combustion gases into the cooling system. Now you can NEVER bleed all the air out! A simple test can confirm. BTW to test the otterstadt remove it from the car and put it over the stove in a pot of water with a continuity meter and a thermometer. Heat the water and note the temperature it closes at and as it cools the temp it opens. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "dmcorlando2003" <SundeQuick@xxxx> wrote: > The system worked fine...ie everything cycled on and off like it > should no problems until there was some air in the system from > haveing a new condenser installed. Radiator, thermostat and water > pump have been replace within the last couple of years. > > > the missing coolant with cool 50/50 mix. After putting aobut 1 > gallon in the fan cycled off and the temp gage was lower. > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/