i used this tool i made out of plastic water line and i drilled a hole for the suction port it works pretty good on my radiator i got alot of dried grease and fuss off. it needs to swivel at the point that you hook it to the vacuum cleaner hose in order to work right and get the size that fits your vacuum hose. i made this long enough to go to the bottom of my radiator,if you are careful you can remove alot of stuff without bending any radiator fins.i made the long shaft out of 1/2 inch line so it will fit between the radiator and the brace the runs at an angle on second gen trucks across the front of the radiator. If you find a mod for this that works better please let me know about it.

 

Nice! That is similar to my rad cleaner tool I mocked up. I took a water hose fitting and soldered it to a 2' stick of 1/4" copper pipe and capped the end. Then I drilled two small holes in it for a spray pattern. When hooked to my hot water heater outlet it blasts hot water thru the rad fins nicely. I usually doused it in Super Clean before I did the puke bottle relocate...

Cheap and effective!

Thanks for serving Jigdog!!