you gotta be kidding me! haha we can use clr in our heater core?!?!! this is amazing because i had a dodge ram last year and the heater core on it was a nightmare to get to so i never changed and thus never had a heater cause it was clogged but i always wondered if clr would work to clean it. thats awesome some one out there thought the same thing and was actually ballsy enough to try it and it worked haha this is too cool

 

I wouldn't just use CLR... .they make stuff specifically for doing flushes, Restore and Restore +. Ford also has VC-9.

Like I said before the impellers suck on these, they crack and fall apart all the time.

 

Thanks mdub! Hope my truck will b ok after this !

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