Thread: Coolant loss - what connects to header tank

Originally Posted by d2dave

Man that is such a nice looking piece of gear. I have to get one of these.

Do you mind disclosing the cost?
If you do, sent me a PM.

You searched for Header tank - Page 3 of 7 - AlliSport

Originally Posted by sierrafery

That port was originally for the EGR cooler return that's a fact so if the EGR was deleted this port is futile so you need a Eu2 tank which doesnt have this port at all as it didnt have EGR cooler, you can buy BMW E30 tank which has a low level warning switch too, see from the following post and beyond td5 engine saver low water level alarm

I beg to differ. The EGR cooler return is on the edge and has a smaller diameter. See the image.

header.jpg

The different pictures don’t help - but the EU3 Td5 has a line beneath the expansion tank as well. Not sure if they changed this set up between different years with the EU3 version as have also seen a second line on the side. So perhaps it depends on which bottle is installed.



I am thinking this is a red herring and the expansion tank is a cheap replacement and has failed at a different point.

Originally Posted by Bohica

I beg to differ. The EGR cooler return is on the edge and has a smaller diameter. See the image.

header.jpg

That's the coolant return from top of radiator which is there for all modells

Originally Posted by sierrafery

That's the coolant return from top of radiator which is there for all modells

Look at the bottom.
header tank_LI.jpg
Marked in green

That's what i was speaking about ...sorry i missed the pic from the OP first post cos it didnt open first time for some reason, now i see that big hole in the bottom

Just checked my old tank which rests in the garage and that "port" is there on Eu2 too but it's actually not a hole through it, it's blank from factory but it's interior bottom is thinner than the tank's body so i presume it's there to blow if too much pressure builds up in the tank , interesting, i didnt observe it untill this discussion

If it is leaking from that hole, how to fix it. I do not think that epoxy will work on nylon.
I think there is not enough room to add a very short hose and a blanking plug.
Better to get a new tank.