Assuming you verified you don't have a mechanical problem, Ford has a cleaner called VC7 Iron Out. It's safe for aluminum as long as you don't go over 10% concentration. It's pretty strong stuff. I use it for doing a heavy duty flush on 6.0L Powerstrokes after a clogged oil cooler took out the EGR cooler. In the event oil gets into the coolant, something like Simple Green concentrate can be used. With either cleaner, remove the thermostat and run the engine for an hour at 1200 rpm to fully circulate the cleaner and give them time to work. After allowing engine to cool somewhat, take the upper rad hose off and run the garden hose into the rad and let it run until you get nothing but clean water out.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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