have done the whole wiki/search thing but nowt covering procedure!
No, but there is
something in the Wiki, though only put it in a few months ago, it's here... under Diesel/Cooling
http://wiki.80-90.co.uk/index.php/Coola ... w_radiator
No serious bolt corrosion issues, maybe one was a bit difficult and worried me for a second or two..
As usual, before starting a job, have a good look around at what's involved and even try loosening the bolts and in this case checking the consition of other parts involved, so you can get them ordered 'before the crisis'..
The bottom bracket setscrews are the ones, they should come out if you use a good socket or ring on them and 'commit' to them first time out. Then the top is just slotted in.
Rest is pretty easy if you have plenty of time - like all jobs if you want to do it 'bish, bosh, bash' something will go wrong... think it through first. e.g. check for incipient hose and pipe leaks, condition of clamps and clips and make sure you have these sorted, slightly loosen and pre-lube anything that has to come apart, a quick wire brush and clean-up
before attempting to remove something.
As you'll see when you read the Wiki item, is that I hadn't reckoned on a new rad being somehwat different in design as far as allowing the cowling to seat nicely - but with a bit of time, turned it to my advantage I suppose.
Take the opportunity to clean the fan terminals and coat with No-Crode or similar, ditto, thermoswitch wiring.
Good luck. Might be best to drain the WHOLE cooling systen and refill with new 50/50 mix, although you can easily tie the hoses up high enough to prevent a flood of coolant (I always seem to have more trouble fully sraining T25 than re-filling and bleeding, which seems fairly easy).
PS. Also a good time to take a look at the heater valve, and cable connections, ensuring it turns off and on fully and has no leaks, ditto I also removed and washed out the windscreen washer bottle (Ugh stuff inside it) and replace rubber seal etc.