If you use Simple Green, be sure to totally immerse the piston, or head, etc. Removing the head & cylinder enables the head to be soaked in something like Gunk (brand) Hydroseal (up to a week!) or Simple Green (50%, overnight). Leave the valves and springs in the head. I suggest that you do NOT take the top end down too far just to de-carbon it. I suggest you leave the rings on the piston. on a BMW Airhead Motorcycle is best done with the pistons & rings removed & separated from each other, & the head disassembled. De-carboning of the top end, heads, pistons, etc. Snowbum's BMW Motorcycle Repair & Information WebsiteĬlicking on them at every visit helps support this website!Ĭlicking on something inside an advertisement helps even more!!īe sure to read these articles (don't forget!):ĭe-carboning is done for various reasons, but especially to keep compression ratio from increasing, & for keeping hot-spots out of the cylinder head.
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