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Join Date: Nov 2007
Location: Chandler, Arizona
Seafoam will not do anything to clean up coolant/water in the oil. It only works on petroleum residue. Also if you did the mod without removing the stator cover, you likely have bits of metal shavings floating around in the engine as well. SeaFoam won't help that, in fact I don't know anything that will, even a complete engine teardown cannot get to every part. There could already be metal bits embedded in the bearings, or plugging up oil passages. Even a tiny bit of metal shavings can destroy and engine. Whenever I take an engine apart, I do it in an area that is almost as clean as an operating room. I clean around the oil filler and drain, and spark plugs real good before removing them, to keep any dirt out of the engine.
I definitely recommend changing the oil several times (use Walmart SuperTech oil, it's cheap) check the oil filter and screen for pieces of metal, and hope you don't find any. Flush the cooling system, and fill it with 100% distilled water for now. Glycol and oil mixed together make glue, and will destroy an engine in a hurry. It has a white color, and looks kind of like cottage cheese. Once it has reached that point, the engine is toast.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike