E39 water/coolant leak

[Waynester]

I have an E39 and recently noticed it was losing water/coolant, literally - a puddle on the ground.

I have traced it to the side (White/clear) filler tank, where it joins at it's base to the radiator.

Does fixing this involve a whole new rad? Having looked at the radiator closely, it appears to be in very good condition.

[Fox-]

The cooling system on these cars is quite literally made of cheese. Replace the rad - if it hasn't exploded yet its only a matter of time until it does, they all split at the end tanks no matter how nice they look elsewhere.

[wolfie1978]

recently had to have my expansion tank replaced. just involves the tank it's quite an easy job but do the cap as well as they fail after time

[Waynester]

Ah ok, if I can get away with just replacing the tank & cap so much the better!

Thanks for the advice chaps


Edit: This is the tank I need but my tank itself is not split, the water is coming from the join tank to rad with the o ring.
Do you think all I need is the o ring, or is it just a question of time before my tank splits?
Tbh, it does look a little bulged...but it has looked this way for the last 4 years I have had the car?

http://www.ebay.co.uk/itm/BMW-E30-E36-E34-E39-E38-...

Edited by Waynester on Monday 5th September 20:13

[sparks_E39]

I came too close for comfort to writing off my 528's engine when the radiator let go, replace everything- £500.