Posted by Don in Missouri [172.68.59.156] on Thursday, September 22, 2016 at 23:07:54 :
I've got a water jacket aftercooler for a 4bt. I pressure tested it, and it does not leak, but it has a lot of rust scale clogging some of the air passages. Is there any way to clean these things?
The rust is not in the water side. It's on the air side. It came off a core motor that had been sitting around, and the whole intake is full of rust. I first suspected that the aftercooler must have leaked, but it holds good pressure. It must have just been poor storage.
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