one of my shimano spds has been clicking for a while, but today it was quite bad. they are quite old, s/h when I got then, (of course) and have been on other bikes, so I've had them 5/6 years, so time for some TLC.......NOT.
Bit of a CBA day really, so I got out the drill, heat gun, and an oil can with some EP90 gear oil, (Landrover Diff oil). Tipped Olive on it's side, drilled hole in centre of pedal end cap, squirted loads of Bike lube in, spun pedal a lot, pumped in some EP90, that was quite thick, as it was about 2 deg, plugged in the heat gun, warmed up the pedal shaft, spun and pumped and warmed. Jobs a good'n, then filled the hole with a plob of grease.Ditto other side, and took it for a spin.....
.i think one of the pedals is on its way out tho, as it was on Blodwyn when it was hit, and maybe shaft is a tad not straight. Still should last another 2/3 years (10/15k km).