Last I looked the Echlin catalog is broken down by section, once you find the temp switches you should be GTG.
IIRC you may get lucky on the fan switch, the Buick GN was running a lower temp thermostat than most engines did/do, fair number of part numbers and info here: http://www.thirdgen.org/forums/cooling/402305-any-cooling-fan-switches.html
Won't hurt anything, but realize the colder you try and keep the engine, the more work your cooling system (in this case mainly the fans) is going to have to do. The higher the differential between ambient and coolant temp, the more efficient heat loss will be. Almost certainly won't be an issue, but thermostat governs the minimum engine temperature, and has zero bearing on maximum engine temp when working properly, other than the time it takes to get from say, 180* to 195* (if you were to swap temps). If the engine will stay at the thermostat rated temp of 180*, it will do so at 195*.
195* is generally an emissions function, but there are other ramifications, I'd have to look at the .bin (data that is on the ECM's PROM) to see how engine temperature affects fueling. Some people have no problems keeping their trucks cool, others have issues. Fan efficiency along with a good radiator is what will determine whether the engine temp stays consistent or not.
BTW, here is one of the Echlin switches, man they are pricey! https://www.napaonline.com/napa/en/p/ECHFS113/ Can probably find a non-Napa piece for considerably less.
IIRC you may get lucky on the fan switch, the Buick GN was running a lower temp thermostat than most engines did/do, fair number of part numbers and info here: http://www.thirdgen.org/forums/cooling/402305-any-cooling-fan-switches.html
Won't hurt anything, but realize the colder you try and keep the engine, the more work your cooling system (in this case mainly the fans) is going to have to do. The higher the differential between ambient and coolant temp, the more efficient heat loss will be. Almost certainly won't be an issue, but thermostat governs the minimum engine temperature, and has zero bearing on maximum engine temp when working properly, other than the time it takes to get from say, 180* to 195* (if you were to swap temps). If the engine will stay at the thermostat rated temp of 180*, it will do so at 195*.
195* is generally an emissions function, but there are other ramifications, I'd have to look at the .bin (data that is on the ECM's PROM) to see how engine temperature affects fueling. Some people have no problems keeping their trucks cool, others have issues. Fan efficiency along with a good radiator is what will determine whether the engine temp stays consistent or not.
BTW, here is one of the Echlin switches, man they are pricey! https://www.napaonline.com/napa/en/p/ECHFS113/ Can probably find a non-Napa piece for considerably less.
Last edited: