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Athena Power Torque 11X3 crank, clicking noise

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Athena Power Torque 11X3 crank, clicking noise

Old 05-21-18, 12:13 PM
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Athena Power Torque 11X3 crank, clicking noise

I have an Athena 11X3 (sue me) Power Torque crank installed on a 1980s-era steel Bianchi frame. It has recently developed a clicking noise, which is far more pronounced if I am standing up on the pedals and hammering up a steep hill. I get one double-click for each revolution of the crank, when the left crank arm is at the 6:00 position. I've checked/tightened the crank arm (42 Nxm) and the crank bolts (8 Nxm) to spec. No change.

Here is the puzzling part: I get the click only when in the lowest chain-ring, under heavy load. If I am in a nearly equivalent gear with the middle chain-ring, applying an equivalently heavy load (climbing a steep hill while standing while 195 lbs), there is no click.

Normally I would just pull everything apart, but I don't own the Power Torque tool, so would either have to buy one or take it to a bike shop that might have one.

Any suggestions before I do something drastic?



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Old 05-22-18, 08:53 AM
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Old 05-22-18, 05:39 PM
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Often clicks or other noise from the crank is due to the bottom bracket cups. I expect your frame is Italian threaded so it's essential the drive-side cup (bearing holder in this case) be VERY tight to avoid loosening. Since you can't pull the crank, you are going to have to go to an LBS to have the crank removed and the bb cup threads heavily greased, or better yet, wrapped with teflon tape, and torqued to spec.
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Old 05-22-18, 08:52 PM
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Thanks!
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Old 05-23-18, 08:45 AM
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What year is your PT crankset? Starting in 2016 (I think) the PT crankset no longer requires the special Campy tool to remove.

+1 on the bearing cups, since it's italian threading, that does slightly increase the chance that it could have loosened a bit.

But, the click only happening while on the small chainring does muddy the waters a bit. Can you tighten / check the tightness of the chainring bolts without removing the crankset from the BB? If you can I'd try that first.
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Old 05-23-18, 08:51 AM
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It is older than 2016 and definitely requires the tool. The bolts are accessible and the torque spec is 8 Nxm and they were all tight. Both cups were also torqued to spec, but I did not put anything on the threads like Locktight or teflon tape.

Thanks for the replies!
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Old 05-26-18, 06:40 PM
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I took it to a bike shop. Turned out it was in fact the chainring bolts for the inner chainring. I was told the trick was to loosen them first and then re-tighten to spec. Oh well, $20 to learn a new trick.
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