Post #20
So it's a standard 205 Gti expansion tank.
I had a set of BBM silicone hoses that I used a few bits out of and chopped around. I made a T piece with one part being smaller than the other 2. That came off the thermostat housing. It joined to a made up copper rail along the back of the block as I didn't need a heater take off.
I used an aluminium joiner on the other end to join to a 90 degree bend off the bottom of the expansion tank.
The thermostat housing is off a 16v xsi. As it only has one outlet on the rear.
It then has a BBM alloy adapter so it can fit the 205 slip fit pipe for the top pipe to the rad. I used the top pipe off a 16v xsi again which I cut the ends off to make slip fit. This was a good shape to leave a big space on top of the gearbox as the pipe routes out of the way.
From the rear of the engine water block I used a standard pipe cut down, then an alloy joiner to a silicone 90 degree bend to be a slip fit onto the bottom of the rad.
One of the top pipes on the expansion tank was blocked off, while another had a silicone pipe which is standard 205 size to be the return from the top of the rad above the alternator. And then the other top of the expansion tank is the overflow leading to the floor.
Then the fan setup is 2 pulling fans on the rear of the rad.
I hope that's some help and not too boring!
Obviously my solution was mainly to plumb it all in without the extra heater matrix pipe work.