Currently have the cylinder head off my 998 Mini 30 because of a blown head gasket.
The surfaces are far from ideal but my more pressing concern is that 2 of the water channels in the block appear to have been completely blocked by rust, (see picture).
Any ideas on how I can go about remedying this? How ruined could the inside of my block be?
Obviously I don't really want to throw it all back together in this state, any advice would be much appreciated,
Cheers
David