How Can Remove This Crank Pulley?

[Atari Boy 11]

Some of you may remember that my old 1.9 8v started knocking on the way back from a rolling road session.

Well I am now trying to diagnose what went wrong. I have found lots of small copper bits in the bottom of the sump which even I know is not right. I want to have a look at the crank but want to remove the crank pulley first, there is the problem.

How can I move the crank pulley, the bottom end is on a stand, the head is off and I am not able to lock it with a dowel so that I can get it off. I don’t have access to a zip gun. I have tried locking it via the larger hole in the pulley but I just end up bending the ‘dowel’ or I think I am going to trash something.

 

 

Any tips?

 

Thanks

 

Jonny

[Saveit 0]

You probably need an air gun (dont know what its actually called in english? Zip gun?) that can "knock" the bolt around without spinning it. You can probably borrow it and a compressor from someone?

[pugman211 0]

Yup you will most probably need a zip gun. As that bolt has to be highly torqued for the oil pump, unless it has a woodruff key?

[Anthony 1,003]

Without the flywheel fitted and without an impact gun, you've made life difficult for yourself.

 

If you've got a couple of flywheel bolts to sacrifice, put a couple back in opposing each other, put a ring spanner on one locking it underneath the other, and turn the engine until the spanner locks against the engine stand. Then undo the crank pulley bolt with a socket and breaker bar. Difficult to explain, but should make sense when you try it - just make sure that the flywheel bolts are screwed in enough turns that they won't rip the thread out of the crank...

[M@tt 77]

assuming you've got the sump off, another way of doing it would be to get a block of wood and wedge it between the crank and the inside of the block. This will stop the crank from spinning as you try to undo the bolt.

[Tom Fenton 1,542]

Matts right, nice thick block of wood, sorted. Works a treat, done it many times in the past. Now I have a windy gun instead!

[skeggyrik 3]

Matts right, nice thick block of wood, sorted. Works a treat, done it many times in the past. Now I have a windy gun instead!

What he ^^ and Matt said

 

That's what I ended up doing.

[Alastairh 47]

Personally, id chuck it in the boot of the motor and take it down the local garage and air gun it.

 

But yeah, my electric impact gun would do that.

Edited May 19, 2009 by Alastairh

[Atari Boy 11]

I have taken the pistons and liners out so the is less block of wood opportunities.

There is a tyre place about a 5-minute walk away, I might look like a tit but I might take it down there on the stand.

[M@tt 77]

You dont need pistons etc with the block of wood method. Just put a chunky piece of wood down the inside of the block. so that as you try to rotate it one of the large solid webbings on the crank pushes against the wood and is prevented from turning.

 

2 minute job!

[Atari Boy 11]

You dont need pistons etc with the block of wood method. Just put a chunky piece of wood down the inside of the block. so that as you try to rotate it one of the large solid webbings on the crank pushes against the wood and is prevented from turning.

 

2 minute job!

 

Worked a treat, thanks.

[Guest dimma cakey]

just a quick question, i have the same problem, is there any damage that could be caused from the block of wood method, eg to the crank or bearing etc, thanks

[mattbenselin 0]

Seeing as quite a few people recommended doing it, and the topic author has now done it with positive results, I would say no damage can be done.

[Tom Fenton 1,542]

Remember that the crank and bearings can withstand the full torque developed by the engine, the torque needed to undo the crank pulley bolt is less than this.

[johny105_y2k 1]

unless you go through the crank casing which is very very very unlikely.

 

 

but it happened to me using said method

[ORB 227 1 Cars]

ok

 

I had the same problem a few years ago on a 1.6 (worryingly enough, I have a compressor and a windy gun, but did not think to use them!)

 

 

I too thought about the block of wood, but I was not happy with the chances of damage. So I devised this, took about 5 mins to make and works a treat!

 

 

 

 

Length of flat bar, two holes drilled and two bolts inserted to lock to the holes in the pulley. Spanner in one hand and bar in the other and away we go!

 

 

To be honest, I am shocked no body else thought of this!

[taylorspug 7]

Ive used ORBs method in the past. Then promptly lost the tool i made to do it afterwards. Great.