Getting my top off....

[snapz]

the coolant/water expansion tank on a t350... Its on really tight and i couldnt get it off when i wanted to check I had enough water.

Anyone got any tips?

[gridgway]

if you did it cold, try with it warm (NOT hot). The different expansion rates might make it easier.
GRaham

[phoenix-pete]

Use a rubber glove.
Either the surgical one's or a marigold from the good lady.
Works everytime!!

[maddog-uk]

Yes a large pair of grippers and stick a sock over it. It works for me!