Good Morning

I hope someone may have the answer.

My 2006 Range Rover Sport seems to empty the air suspension tank overnight, but I have sprayed everything that I can get to with soapy water, valve blocks, compressor, air line joints and as much of the tank as I can see, but nothing.

Before I spend out on a new tank, does anyone think this may be the problem, perhaps on top of the tank? The surface of it is very rusty and pitted. Has anyone else had this problem before and a new tank cured it?

Thanks in advance.

Andy

Change the tank