2004 Hyundai Sonata Timing Belt Tensioner

Yes. You loosen the tension bolt on tensioner.

There isn't a bolt on the timing belt tensioner. Not the timing belt tensioner part that I have off. The hydraulic cylinder on it is fully extended, and I need to know if it's collapsable in order to put it back on. Is that possible or does it have to be replaced with a new tensioner?

Below is a picture of the part (The silver cylinder on the far right side is what needs to be pushed back in.):

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Oh okay. Sorry about that. Your vehicle is equipped with an auto-tensioner. The rod should extend from the end of housing.55" (14 mm). If it extends further or less than that, it must be replaced. If the rod is within specs, place the rod into a soft-jawed vise and ensure it is hard to push in. If the resistance is low than you will still need to replace the auto-tensioner.

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Makes much more sense now. Thank you!

So I'm guessing that the tiny holes going through the housing and the cylinder are for a pin of some sort to be pushed through to keep it in place inside in order to put it back on the vehicle?

This should be the last question. Thanks again!

Yep, you got it ;)

If the auto tensioner rod is fully etended (which looks like it is), place it in soft-jawed vise and compress rod slowly until hole in rod lines up with hole in auto tensioner housing. Then insert stiff wire to hold rod in the position. Leave wire in place when installing auto tensioner. You can remove the wire once you ensure timing marks are lined up and everything installed correctly.

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