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Big Twin
Posts: 1,956
Join Date: Mar 2005
Location: Normally in my own little world
Mood: I own a flame thrower
Pain to see, use a torch or inspection light to help.
Fill the system via the rad' filler cap and then top up the expansion bottle so that the coolant is between the lines.
Take it for a good run at normal running temp and then check the level in the bottle.