Man of Honour
- Joined
- 12 Jul 2005
- Posts
- 21,439
- Location
- Aberlour, NE Scotland
If you didn't flush the rads before use then you have to strip even the blocks down now. If there is flux or some other crap from the rads in the blocks then flushing them won't clear it out as it will be jammed between the pins/fins. Always flush rads out before use. Fill with warm/hot water and a mild distilled vinegar mix and leave for 10-15 minutes giving it a occasional shake, then empty and flush through. Repeat until the water coming out is clear.