Pedal threads

Restoring a vintage bike and not really my thing so require some advice. The cranks have been sprayed and it seems the pedal threads need retapped.

What’s a full proof way to identify the thread diameter and tpi? No markings on crank and the mix of old and new pedals I have nothing fits. Also best place to buy said tape?

Nearly the cotter pin crank arms don’t sit and 9-3 or 12-6. One is every so slightly off. Have disassembled and reassembled with no difference. Any pointers?

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Nearly the cotter pin crank arms don’t sit and 9-3 or 12-6. One is every so slightly off. Have disassembled and reassembled with no difference. Any pointers?

Have you replaced the bottom bracket spindle the wrong way round???

@freezing77 I never had it out but did think about it. I will have a look at it over the weekend and get back. Still need to figure out pedal threads.

I would just buy new cranks to be honest. Pedal taps are pricey, you could get a decent replacement for less cost.

Or try paint stripper if it’s only paint in the threads.

For the off kilter cranks, are the cotter pins in correctly/right way round?

Pedal taps are pricey, you could get a decent replacement for less cost. should cost you no more than £20 and you’ll wonder why you didn’t buy a set sooner.

FTFY.

Yes I didn’t think raps were pricey. I need to do some more precise measurements tomorrow and figure out what size these cranks take.