Hmm, not good to hear about your trouble cleaning the sealer out block and head...Guy at parts store didn't hesitate to say to try it. Even a mechanic said go for it. Kind of in a pinch so figured why not. The bottle sais to just leave it in there, but u think it would be wise to flush the rad?..Hope for the best.

I think I'll change the fan clutch regardless, not too expensive and seems easy enough.

Still wondering if anyone knows if that will require a fan clutch wrench. Assuming that's for a big bolt that might hold the pulley on?

Cheers