Postnote - when checked with a GPS it was over-reading by about 10 miles per hour - so when i opened up again i saw a notch in the silver disk (just up from the crocodile clip in the pic) - which the hand should be re-aligned to. Was spot on after that.

this is the clock in our P4. Looks ok, but...

the previous owner has ripped the orignal out, butchered a cheap battery travel clock, stuck the old face on and held the glass section in with some blu-tak.

these are two old non-functioning clocks donated to see if they can be repaired

started with the Kienzle clock first - someone had already been inside judging by the bezel

undo the three nuts on the back (5mm)

prise off the bezel (doesn't untwist like others)

push mechanism out once the bolts undone

some electrical bits at the back and lots of mechanical bits. seems the principle is that an electromagnet causes a disc to move, which returns under spring pressure, eventually closing some points after a minute or two, which restarts the process

those blobs of solder and a thin wire have been added previously. there should be a low temp solder conenction there which fails if a short occurs. this has been soldered back up in a heavy duty manner

which probably meant next time something was failing, the fuse didn't release, and this resistor overheated, and melted that white drive wheel in the middle...

the late friday night test bed.... better than a freezing garage

now the turn of the Smiths clock

removed bezel and mechanism

large coil visible

pointer showing carbon dust where the contact hairsping meets the impulse pin on the balance wheel

look right in the centre and you can just make out a spark where the spring is hitting the pin

needed to sharpen a screwdriver to get into these narrow slotted screws

electrical cleaner helped free things up

the balance wheel is spining freely here - slightly blurred in the shot

the "n" shaped contact spring in the middle is the one that needed the adjustment. now working ok.

Four new radial tyres 185/80/15 and a "space-saver" spare of 165/80/15

comparing two new ones with an old crossply Avon as fitted

previous owner fitted wheelarch liner

perished sidewalls

old and new

old tread begining to delaminate

new tyre date on top (5th week of 2008) and old below (4th week of 1981... 27years old !)

evidence of where spring band had been rubbing on the exhaust