The new valves are a couple of millimetres larger than the old, plus the inlet and exhaust ports are also larger and smoother.
Old head (above) New head (below)
Old vs new heads. Note safety footwear.
To replace the radiator with an all-aluminium version meant that the front clam had to come off. I. haven't attempted this before (I have removed the rear clam before) but it was very straightforward. The hardest part is getting the inner wheel arch liners out. They are plastic but quite stiff so take a fair bit of tugging to get out, once all the screws are undone.
Next step was to remove the radiator surround, the rear screws were difficult to get to but mole grips helped. I may replace them with Allen-head bolts to make them easier to replace and remove.
Front crash structure cleaned up.
I drilled out the fan brackets and reprinted them even though they are hidden under the radiator and won't be seen. I will have to rivet them onto the new radiator, might have to buy a few rivets.
New radiator with welded on aluminium ends. The original has plastic end caps which are prone to leaking. The fan will be mounted underneath.
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