16-06-2018, 02:54 PM
(This post was last modified: 16-06-2018, 02:59 PM by Stuart Giles.
Edit Reason: more added
)
(14-06-2018, 04:34 PM)Hedd Jones Wrote: Id be more inclined to put it down to steel gears (new)running against cast iron originals.
I think that amount of damage caused to the timing gear in such a short time is more likely to be the result of the actual tooth form of the new gear being wrong in some way. If the helix angle isn't slightly "off" then the new gear's "pressure angle" could be different to the factory item. Rolling an original and new gear across Plasticine on a flat surface is a good way of revealing a gear's pressure angle without resorting to complicated measurement -each impression in the Plasticine should look like a straight sided rack gear with the straight side angle being the pressure angle. Knowing the why is a bit academic though really at this stage, it's just a shame that so many motors have suffered quite major damage.