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Just opened up a BP motor bought to rebuild. Not sure if the crank appearance is normal - all the counterweights have their outer edges machined, with some 8-10mm dia holes drilled a few mm deep (assume balancing drillings), and a couple of Very small drill marks - 2mm dia, less than 1mm deep. The cyl 1 counterweights have a couple of machined flats with numbers stamped in -2, K, 29.
Does this sound normal ?
Do the cams have any numbers cast or stamped on them normally?

thanks
jp 92 NA6, 96 NA8 with Turbo in a clubbie.

OEM ones look like this.

Thanks, that looks the same. Excellent!

jp

jp928 wrote:Do the cams have any numbers cast or stamped on them normally?

From memory '5A' is cast onto them.

Inlet cam on mine has BP and 05 cast on opposite sides of the shaft between 2 and 3. Exhaust has BP and 06.

Must have been thinking of the NB8A:

http://www.solomiata.com/Mx5Engine.html