|
You know, it's strange, but the more that I think about this, the more I wonder if someone lost the previous key and 'fabricated' their own!
Judging by the Balance Shaft keys, I guess the crank key should be steel - and probably pretty tough steel. The one currently in the crank looks like it could be alloy. Also, when I pulled the pulley off (with a gear puller) it seemed to pick up a tiny bit of swarf off of the key - I guess that should never happen steel on steel.
I may be mistaken, but I also think that I see a very small (under 1mm) gap at one end - which I guess the key should not have.
Given that one of the balance shafts had been refitted about 15 - 20% out of synch, the job was clearly not undertaken by anyone with any great dilligence the last time, so I wonder if to save a few pounds, after misplacing the key, whether they cut and filed their own.
I guess this could fit with the marks on top, which could be witness marks to it having been drifted into the recess with a screwdriver.
|