an old piece of speedometer cable works with a drill quite well. You can thread it in the small holes and between the cylinder blocks and the sides.
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Originally Posted by Farrell In Vancouver
Like Panning for Gold!
Great info Tom and I like the plumbing you've designed to do this.
One block I recently cleaned up (before having it checked out at the shop) I got about 2.5 Lbs. of junk out of by using a coat hanger on a 14volt drill. You can bend the wire in various positions to scrape and loosen the rust out, and go through every opening in the jacket. I'll do this for about an hour, then dump the block upside down and put a long air nozzle in to blow out the debris. Amazing how much rust can be removed and still have enough iron to run an engine. The machine shop will tank it as well, but at least most of it is out before I take it in for a magnaflux and crack inspection.
I am quite impressed with your solution for the back-flushing and I think I use this on one engine thats been in a couple of years and see how much rust it's accumulated since it was cleaned out.
Thanks for the pix!
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