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Removing crank pulley with engine on a stand?


Rich.2211

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I've got my engine mounted to an engine stand at present and need to remove the crank pulley. The usual tried methods of using the starter to crack the nut and putting the car in 5th gear etc. aren't going to work. Unfortunately I don't think I know anyone with an impact gun or I would go down this route.

 

My idea being, having also seen it proposed on here before, is to put a few of the flywheel bolts back in a staggered formation and put a bar inbetween them that is wedged against the floor - thus preventing the crank from turning. Then I'm free to get a nice long piece of scaffold on a breaker bar and undo the crank pulley nut?

 

Is there an obvious floor I'm missing here or should this work? Anybody tried it?

 

Any input is appreciated :)

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Didn't work unfortunately, I've actually managed to bend two flywheel bolts in the process (thread in the end of the crank is still fine luckily!) so I must be putting a fair wack of torque through it? I've WD40'd it but not sure if it would penetrate to the threads? and also gave it a few gentle taps with a hammer to try and release the threads. :(

 

My only other idea is a large impact gun?

 

Anyone local to Cannock/Walsall with a large impact gun that wants to earn a few beer tokens shout up!

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Daz has got a decent 300lbft one mate.

 

Give him a shout on Facebook.

 

Think it'll just turn the engine over though...

 

I'll give him a shout cheers. The principle of an impact gun should mean it won't turn the engine over, but the crank is locked in place anyway to a certain degree using a pry bar between a few re inserted flywheel bolts. Fingers crossed!

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Like this! Big Bar, get a couple of pieces of wood and place them between the block and the crank, then employ a jack to support the front of the engine. Use a couple of pieces of wood to make sure the stress isn't localised. Also make sure that the crank is properly bolted in.

 

The final stage is to employ a 'Dad' with a massive bar (lol) to crack the crank nut! The wood ensures the crank isn't damaged and the jack helps you to not bend your engine crane.

 

attachment.php?attachmentid=168964&stc=1&d=1367953365

IMG_3251.jpg

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Like this! Big Bar, get a couple of pieces of wood and place them between the block and the crank, then employ a jack to support the front of the engine. Use a couple of pieces of wood to make sure the stress isn't localised. Also make sure that the crank is properly bolted in.

 

The final stage is to employ a 'Dad' with a massive bar (lol) to crack the crank nut! The wood ensures the crank isn't damaged and the jack helps you to not bend your engine crane.

 

http://www.mkivsupra.net/vbb/attachment.php?attachmentid=168964&stc=1&d=1367953365

 

I could do with one that size! and the bar is pretty large as well!!

 

Shall try locking the crank with a block of wood then. I need to remove the oil pan anyway so shall remove that first to get decent access. I'll spend some time tomorrow hunting down a decent length of bar or scaffolding, there must be something lying around at work fingers crossed. I've got a jack ready for under the engine stand to support it so should be good to go.

 

Shall report back again, hopefully minus one crank pulley! Thanks for the advice :)

Edited by Rich.2211 (see edit history)
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I could do with one that size! and the bar is pretty large as well!!

 

Shall try locking the crank with a block of wood then. I need to remove the oil pan anyway so shall remove that first to get decent access. I'll spend some time tomorrow hunting down a decent length of bar or scaffolding, there must be something lying around at work fingers crossed. I've got a jack ready for under the engine stand to support it so should be good to go.

 

Shall report back again, hopefully mines one crank pulley! Thanks for the advice :)

 

 

No worries! The best way imo is to obtain an old flex plate, bolt it to the crank and then weld some big washers on so you can secure it using the bell housing bolts. The wood method is a bit crude, but if you're stuck it's the next best way barring a huuuuuuge impact gun! :D

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No worries! The best way imo is to obtain an old flex plate, bolt it to the crank and then weld some big washers on so you can secure it using the bell housing bolts. The wood method is a bit crude, but if you're stuck it's the next best way barring a huuuuuuge impact gun! :D

 

Did it in the end mate! Tried a £500 Snap On impact gun first off to no avail, then had one last try with a long extension and locked the crank with a flywheel bolt and pry bar but this was a huge mistake! Flywheel bolt sheered flush with the end of the crank, luckily managed to retrieve the thread and check the crank was okay. Finally bit the bullet and pulled the oil pan off, chock of wood stopping the crank from spinning and a nice piece of scaffold with me and the mrs hanging off it. Went effortlessly, was almost annoyed after all the grief it gave me that it didn't go with a satisfying 'crack'. Crank pulley itself came off with a few gentle taps :)

 

image

Edited by Rich.2211 (see edit history)
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My idea being, having also seen it proposed on here before, is to put a few of the flywheel bolts back in a staggered formation and put a bar inbetween them that is wedged against the floor - thus preventing the crank from turning. Then I'm free to get a nice long piece of scaffold on a breaker bar and undo the crank pulley nut?

 

Is there an obvious floor I'm missing here or should this work? Anybody tried it?

 

 

For future readers, do not do the above!

 

image

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It works that's for sure! :thumbs:

 

Just been checking out your project thread, I'm about to paint my engine block as well, can I ask what paint you used?

 

Ooooh it is super specialist paint ........ Halfords engine enamel :D and about a week of scrubbing, rubbing and cleaning the engine beforehand lol

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