A real good friend of mine owns a Harley shop and we discussed the thermostat and the Bosch intercooler pump at great length. I actually got the drawings for the Ford Lightening pump and by those drawings looked like it would work, however when I received one of the pumps it was NOTHING like the drawings. The Bosch part number we tried was 0392022002.

 

I have the Ford Lightning pump and another Bosch Pump. Ordered from Amazon. , and . Similar pumps but the OEM pump has 1/2 inlet and outlet. The two pumps above are 5/8 inlet and outlet. I could make either of them work but since my pump isn't bad I am sending these back. I have a bad thermostat. Im still considering just bypassing the thermostat instead of replacing it.

 

Since the 2018 bikes don't have a thermostat from the factory and just cycle on and off controlled by the ecm I don't see why we can't do away with the thermostat . If we had to regulate the water temps, why not use a temprature switch to control the grounding circut for the fans and the water pump? It looks to me like a mini relay and a temp switch would be about all the circutry that would be required.

 

Make sure the Bosch pump has sufficient flow and pressure. Don't know what the bike requires, but normal production cars run 16-18 psi, high performance cars run 22-24 psi.

 

I found the my problem is the thermostat. I have found an even better solution for the whole cooling system. I'm taking it all off this winter and replacing it with a jagg 10 row oil cooler and a better tune. Kevin at Pro Performance V-Twin has done several of these with zero issues. He has cut open one of the wet heads and found the passages don't flow a high volume of water anyway. So far so good on the ones he has done. No ill affects whatsoever.

 

Sure glad when I am riding around and smell coolant , I know it is not me!!!!