503recheck
Member
My decision to upgrade to a 3 row radiator when my radiator was being serviced was the start of this thread which can be found elsewhere in the forum under fan clutch questions. My thanks to SF DON who had the correct special order lower radiator hose part number needed to correctly connect a 3.5 motronic motor to a original lower radiator hose connection. Part number is 11531268750. can be found elsewhere in a forum search. I attempted to install a modern spin on fan clutch with a new upgraded 9 blade fan and after much modification and trashing a new part I came to the conclusion that I could not easily do it with the reduced clearance caused by a thicker 3 row radiator. Plus I like the clean appearance and modern technical advantages of electric fans. I started with a forum tip using a flexlite 16" fan at 2500cfm which is rated for both pushing and pulling as a primary fan (more than just a aux fan). It has curved blades for quiet operation and efficiency. I ordered a flexlite thermocouple sensor which threads into the water outlet housing to a avoid that cheap thermocouple that sticks in the fins and ran the wiring into the engine harness for a clean install. I ordered a flexlite electronic speed controller which is temp adjustable and runs at 60% at 190 and goes to 100%with a 10 degree rise in temp from 190 (adjustable). It also has a input for a 12 volt positive signal from the ac clutch signal which will run at 60% whenever the ac clutch is engaged for low speed condensor fan operation. I mounted it on the fan support as seen in the pic. I built a 1"x1" alum angle support framework with corner brackets and mounted it on the existing 3 condensor fan support brackets and spaced the condensor farther toward the radiator for a flush appearance as can be seen in the pics. It took some time and patience but I like the end result. all parts enter the front valence thru the radiator opening so radiator r&r is a must.