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[terry paget]

"No more groping!", said the wife. Puzzled I replied,"Those days are over".
I have a new coolant leak on my last Omega. Peering up at the left hand bottom end of the radiator I see a damp patch. I have changed radiators before, but this forum has advised me to do no more heavy jobs liable to bruise my hands, lest I suddenly drop dead. Bother.

[GastronomicKleptomaniac]

Terry, you've been here for so long, I'm sure someone local will pop over and do it for a brew and a bacon butty...

[STEMO]

Terry, you've been here for so long, I'm sure someone local will pop over and do it for a brew and a bacon butty...

Long way from Teesside (the nice bit). Or did you mean 'someone else'. 

[Doctor Gollum]

It's a bit of a hike, but you're welcome to bring it over here... 

[GastronomicKleptomaniac]

Terry, you've been here for so long, I'm sure someone local will pop over and do it for a brew and a bacon butty...

Long way from Teesside (the nice bit). Or did you mean 'someone else'. 

Definitely the latter...!

[aaronjb]

If the radiator is dry above the level of the bleed screw (the red bit) then the problem is two O-rings on the bleed screw itself. (If it's wet above that then it's coming from somewhere else, of course)

[omegod]

Halfords "little pack of O rings" used to fit the bleed screw perfectly , not sure now like !

Really helpful aren't I 

[terry paget]

If the radiator is dry above the level of the bleed screw (the red bit) then the problem is two O-rings on the bleed screw itself. (If it's wet above that then it's coming from somewhere else, of course)

I will check again, but I am pretty sure it was wet above the bleed screw. I have changed those O-rings on many an Omega in the past! They are 2 different sizes, aren't they?

[Migv6 le Frog Fan]

The plastic usually splits in the top corner, near the top hose,  and runs down the side.

[terry paget]

The plastic usually splits in the top corner, near the top hose,  and runs down the side.

Quite right. It seemed to run all around the pipe, but on moving the hose back on the pipe, it appears to be a small hole right at the top. Proper repair is replace the radiator, but that involves groping; can I repair the small hole, if so, what is the best method - araldite, hot air gun, something else?;

[Doctor Gollum]

Those are all temporary bodges as the involve heat... And will fail once the radiator heats up

[Raeturbo]

https://www.easycomposites.co.uk/#!/resin-gel-silicone-adhesive/epoxy-resin/very-high-temperature-epoxy-laminating-resin.html       
                                              Have a look at this stuff

[terry paget]

Now I am confused. In post#9 I moved the top hose back along the pipe to expose the leak better, but in a 2 hour idle only a tiny leak appeared. I took it for a 10 mile drive yesterday morning, and 12 miles Wells and back last night. no leak. 12 further miles this morning, still no coolant loss. Explain.

[Doctor Gollum]

No water left or thermostat didn't open. 

[terry paget]

Rocking the car I can see the coolant level is still correct. Heater blows hot, top hose is hot.