Disco 2 coolant leak

So I've replaced head gasket, thermostat, checked hoses, tightened everything and recently, replaced a wrecked water pump. Still I find that the coolant level gradually reduces with no obvious sign of a leak. Slow but annoying.
One issue is the long pipe from expansion tank to top of radiator has gone brittle and snapped off at the rad. I had repaired this with a length of tube. Checking on it today, I could see coolant seeping out at the top of rad and thought it was my repair failing. Turns out I have coolant leaking out of the screw hole in the top of the rad, used to hold the viscous fan surround in place. WTF? Really? a feckin screw hole! I've put some sealer in it and am waiting for it to dry to see if It will hold, but I am annoyed. What kind of design is it where a screw hole can be the cause of failure of the radiator? Mad!

Anyone know where I can get a replacement pipe and a cheap radiator?

that leak at the screw described by you is quite common, find a proper dimension temp resistant small o-ring and tighten the screw on it...that's how i fixed mine

Beyond me why Landrovers are so popular considering the number of engineering design faults. Cheers

CliffordGarrett said:

Beyond me why Landrovers are so popular considering the number of engineering design faults. Cheers

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That's one of the iffy 700 improvement the D2 has on the D1

discool said:

That's one of the iffy 700 improvement the D2 has on the D1

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yes, it was conceive this way to not let the coolant degrade too much and refresh it more often in the benefit of the system's cleanliness