If you are going to take the radiator in to a radiator shop for them to fix take the gas tank in too. I had a gas tank that was all gummed up on a car one time and took it to the local radiator shop and they cleaned it just like they did the radiators and it came out looking like new inside and out. Never had any other trouble with the gas after that.

 

Real good advice from ibrauer.

Or you can just buy two carb rebuild kits and 10 fuel filters.