Thread: Repair to expansion tank on 95 Discovery tdi Can it be done?

i dont think it would weld well because of the type of plastic??
i have been proven wrong before though??

what i would do is this. try welding it with a large soldering iron
if this looks like it will work, do a good job.
but to be sure make the area where the leak is rough and
buy some kneed it 2 part epoxy and stick a patch of that over the area.
it wont come off.

i glued a crack in a fiber tank together with kneed it in my
stock car, still there works great.

cheers phil

Where it is leaking will be contaminated and will not seal properly.
Why risk the engine over $145 bucks? 8O

Trev.

seen them much cheaper than that - less than $100 for sure.

Try Alan at Jag and Rover Spares or Karcraft.

HTH

LRH

<div class='quotetop'>QUOTE</div><div class='quotemain'>Where it is leaking will be contaminated and will not seal properly. [/b][/quote]
i knew someone was think that but it dosent seam to worry the kneed it??

should be plenty of second hand ones around.


cheers phil

Your tank should be the black version - my Disco is the similar age. I've been in the near vicinity at TR spares in Sydney when a couple of people have come looking for replacement expansion tanks. It seems that the black plastic dosen't age well, with the heat and coolant. Since if you loose coolant level a) possibly won't notice it because of the location of the sender and the Tdi has a weird set up where the top of the engine is higher than the tank, then having a secure coolant setup is important.
When my black tank went a couple of months ago, I thought about repair, but you can tell that the black plastic has deteriorated and if you weld the seam, on a hot day it'd split somewhere else. The white version ( now I have got one) seems to be sturdy - ask me in 10 years I suppose.

Whilst you are at it, get some brass coolant plugs to replace the one in the radiator and on top of the thermostat - they're made from the same black stuff and surely they are on the way out too.

This is the scary bit - overheat the head, the aluminium looses hardness and say goodbye to head - can't be used again. That's why $140 for the tank and $8 for the brass plugs is worth it.


Langy

ps make sure the lower rad pipe offshoot that crosses over the waterpump pulley is secure - sometimes it flops around and rubs on the pulley, eating into the wall of the pipe.