Coolant Expansion Tank leaking

[luckstar69 0]

Hi all

I think my tank is leaking, I am not 100% sure though, when I top the coolant up to max level, I check my driveway and the next morning its dripped a bit and after a day or 2, I'm back down to minimum level on the tank, just under the tank seal where the 2 halves are joined. There is no leak from the cap itself, its dry around this area.

I can’t see where it’s leaking from but I know it’s dripping from a height, I can feel the back of the tank and it feels damp, just after I’ve topped it up and sometimes see a drip hanging from the bottom of the tank. I can’t pin point the leak though, it’s a slow one.

There is no oil in the expansion tank and the car is running fine, the hottest it ran was at 94 but is usually at 90/92 even when driving quite fast. The temp gauge has never gone past the half way point.

Is this a known problem? Shall I just replace the tank, is this easy? Where is cheapest to get one from?

Thanks for any help

[craggsy 91]

Look for a residue on all pipe joints.

[luckstar69 0]

They're all very dry

[Ed 2]

mine was ding this but it was due to pressure building up an pissing gout the breather in the expansion tank i think.

Im no mechanic but i put it all down to the thermostat breaking! There apparently known for going in vr's!

[Bobtrude 0]

Thermostats are like shoes.. . . . . You dont use one pair your whole life .

They are to be replaced after some time. . . . .

[luckstar69 0]

Hmm, helpful!