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Fitted the modified thermostat housing and bypass hose today.
Installation went ok, reused my existing thermostat and temp sensor so the test is fair when comparing a before and after. I'd got two lengths of hose available and after a bit of trial and error settled on going around the back of the engine. Filled it up and had a drip from the bottom O ring, took this back off and replaced it. Filled it up again and waited while the air bled itself out.
Fired it up and within 30s or so there was heat in the thermostat housing and the bottom pipe, result. Ran it for a while to check for leaks, all good and put the fairing back.
Took it for a run and the gauge hovered just around the first line above the C. Ambient was about 7degC.
I'll run it next week and see how it goes, if it still seems to run cool, I'll test both thermostats I've got to see if one is better than the other. If there's nothing in it, I'll start blanking off some of the radiator, easily removed once the weather warms up.
Total cost , £7 for both weld ons. £25 for the thermostat housing and bottom pipe.
Hoses free from old stash at work. Welding, free. Could have got away with modifying my own stat housing and pipe but wanted the ability to go back to std if it didn't work.
If I were to do it again, I'd probably make the weld on at the stat housing to suit a banjo fitting and go over the top of the engine.
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