Berryman's Chem Tool in the aerosol can. Then I used something to rub the porcelain clean, probably sand paper. Don't remember but I wanted something that wouldn't leave a residue on the porcelain. Went back and forth on it several times.
I read up on how it works in a motor repair manual, Chilton as I recall, and understanding how it worked, cleaned it up. Took about 30 minutes start to finish for whole job.
Didn't look squeaky clean, but was cleaner than it was. Trying to recall, I think the porcelain looking part of it absorbs exhaust gasses, in doing so measures the O2 and with a layer of exhaust residue over it, it was unable to do that.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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