Here's a crap pic of my heater core:
The guy from the scrap yard I bought it from told me to just let it set in a bucket for a few days with some grease cutting soap or deterrgent... I did that, and then did a similiar trick with the garden hose (cut an old hose up and clamped it to the inlet and turned it on full blast
... that pretty much cleaned it.
Rich W
[This message has been edited by Rich W (edited 03-20-2000).]