[Balloon Bob]

Hi there,

I have a 2011 Hyundai i30, auto.

I want to change the timing belt and waterpump.
I've come across a question though, how do I keep the crankshaft in place while I untighten the crankshaft bolt which is tightened onto the crankshaft pulley?
I know I don't want to move the crankshaft counter-clockwise, but don't I need to untighten the bolt counter-clockwise? How can I loosen the bolt, but not go against the correct rotation of the crankshaft?

I only have hand tools.

[tw2005]

Getting it off will be easy enough but how will you torque this back up?

The motor rotates clockwise, a breaker bar and correct sized socket , then have the breaker so it's against something solid so that when the motor rotates clockwise the bar is already locked and then the strater motor will have enough torque to crack the bolt. You will need to disable the motor from firing for safety like removing the ECU fuses or fuel pump relay.

generally a quick bump of the starter with break the bolt free. There' s specialised tools for locking the flywheel or ring gear in place.

Here's an example of the concept

undo crank bolt with starter - Google Search

[Balloon Bob]

Hey, thanks for the quick reply!

Well, as was first question, the more I look into doing the job, I'm seeing things I don't know how to do. I've watched about six videos of people doing it on different engines, or the same as mine, and I've still not seen a way they do it, that I can. To take it off and torque it back up is my main question.
I borrowed one of those Haynes manuals about a Toyota Carolla 1997-2006. And they jam a lever in the flywheel, but I never saw anyone do that on the Hyundai. I think I'd like to find a tool to keep it in place, I'd rather not mess it up, it will be my first time.

[Endeavor]

Use a chain wrench to hold in place. I also placed a rubber band underneath the chain, so it does not damage the pulley. You need 2 more hands with that. Also get the longest extention  arm possible for the bolt.

[nzenigma]

Use a chain wrench to hold in place. I also placed a rubber band underneath the chain, so it does not damage the pulley. You need 2 more hands with that. Also get the longest extention  arm possible for the bolt.

Get the wrench tight, handle out to left side, put wooden block under it, or add short tube extension so that handle rests on the chassis rail.

All of the above to get nut off including rattle gun.

[sundiz]

Not sure if the crank bolt has to be opened from top or bottom side, but one handy tip might help if it is the latter. It is fairly common trick to use the cars jack to open stuck bolts. Especially when changing flat tyre after tyre shop has put the lug nuts with such a force you lack the strength to open them with cars crappy tools. Put the jack on the ground and use that to lift the tool you are using to open the bolt. You get much more power to the tool, unless you are one of the strongest man in the world. @5:00 Min mark. How To Change a Flat Tire Using The Tools In Your Car - EricTheCarGuy - YouTube

Of course you should not ever use this method, but sometimes you just don't have the right tools....

[nzenigma]

  
Just checked out my "right tool". Wasn't sure if the 2.0L pulley has spokes. It does which confirms I have used my trusty Navara killer tool. Its a 30mm steel shaft, 'v' section welded at the top with 2 welded  17mm bolts protruding side ways.
The arm rests on the ground, socket can fit on bolt, swing on breaker bar from above. Reverse process to torque bolt.

[Balloon Bob]

Wow, thank you for the input everyone!
I'll look into each of your methods and what you are using.
Cheers