03-07-2019, 03:59 PM
I gather you have removed the water branch nuts or studs because "it is loose as far as the filler neck".
In which case, if you are going to have trouble with it, you have incurred the problems already and may as well remove it after you have undone the filler.
A 12"/30cm hacksaw blade is a good thing to poke between the cylinders middle cylinders, and if you can get something like the old curtain wire - maybe an old bike or car brake cable - and run it slowly in an electric drill, that may be fiddled round some of the other passages in the block.
If the water branch and associated opening in the head is clear of gunge then you probably don't have a problem with water passages, anyway.
If it is completely blocked with stuff, you may need "stage two" - which is removing core plugs (you cannot normally get at the rear one) - to get at the gunge, and drilling out (carefully) the water passage holes in the head and the block.
And if the block has lots of stuff, the head passages will need cleaning too.
In which case, if you are going to have trouble with it, you have incurred the problems already and may as well remove it after you have undone the filler.
A 12"/30cm hacksaw blade is a good thing to poke between the cylinders middle cylinders, and if you can get something like the old curtain wire - maybe an old bike or car brake cable - and run it slowly in an electric drill, that may be fiddled round some of the other passages in the block.
If the water branch and associated opening in the head is clear of gunge then you probably don't have a problem with water passages, anyway.
If it is completely blocked with stuff, you may need "stage two" - which is removing core plugs (you cannot normally get at the rear one) - to get at the gunge, and drilling out (carefully) the water passage holes in the head and the block.
And if the block has lots of stuff, the head passages will need cleaning too.