I personally don't think it is worth testing it. Think about it... how many
years did you get out of it? How many miles or kilometers? Plus, timing
chain and tensioner is supposed to be changed roughly every 150,000 miles.
When you divide the miles or years from price of the new tensioner...
$63.70... don't you think it is cheap enough?
Plastic guide breaks only because timing chain was slapping against it... so
chain stretched and weak tensioner caused it.