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How to optically determine if a camshaft chain is still okay

Sometimes you have a stack of old parts and you need for example a camshaft chain. Now how can you optically determine which one is usable?

camshaft chain ps50

The one marked "New" is one i found without a wrapper, so i think it is a NOS chain for the camshaft of the Honda PS50.

The chain marked with A is the one that came out of the engine block that i am restoring. You can see that you can bend the chain sideways more than the new chain.

The chains marked with B are definitely worn out. They can bend much further even than chain A. Also, if the chain-links them self show a lot of space in between the so-called "8" parts and when it rattles, the chain may be worn out too. And always check for dents in the rollers!

Comments  

0 #2 foxbox 2020-04-29 14:36
Quoting Bracken2020:
Isn't it an indication if you can lift the rollers of the sprocket a little that its worn? Is there a more accurate way of checking the chain insitu with the head and barrel off? For example what should be the measurement to the rivet centres over so many links (10, 20 etc)


I think that if you can lift the rollers off the sprocket the tensioner is giving way too much slack. And I would not know another way to check the chain, to be honest. What I do know though, is that I've never heard of a chain breaking. I'm actually curious if that ever happened with normal use, that is.
0 #1 Bracken2020 2020-04-29 11:54
Isn't it an indication if you can lift the rollers of the sprocket a little that its worn? Is there a more accurate way of checking the chain insitu with the head and barrel off? For example what should be the measurement to the rivet centres over so many links (10, 20 etc)

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