[TR] TR3A timing chain lower gear

Art McEwen amcewen2 at cogeco.ca
Fri Dec 4 15:18:57 MST 2009


So how much play is too much?

http://www.youtube.com/watch?v=JdgqEHTNJq0

Seems to be when the lower (crank) gear is in line with the upper (cam) one there is side to side slop as if the woodruff key is worn down.   But the sprocket will also move forward & back, when it does there's less side to side play like it's fallen into a groove when it's in it's normal position.

Some of the forward/back play would be eliminated by the oil deflector in the cover but it's not a true thrust washer so what holds the crank gear in line with the cam gear under normal conditions?  Just the chain?

I'm hoping the gear metal is softer then the crank so any wear would be in the gear and not the crank, or is that wishful thinking??


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