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Flywheel Stuck On Crank


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#1 detroitmini

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Posted 12 February 2020 - 03:28 PM

Hello all,

 

I have a 1978 Austin MIni 998 that I am currently rebuilding the engine this winter. I have gotten the engine mostly disassembled and am trying to remove the flywheel from the crank. I have made a puller (didn't want to wait for shipping from UK) and have been following the Haynes manual but the flywheel WILL NOT COME OFF. I have gone to the point where I have used a strong impact on the pulling bolt until the bolt won't even turn. I have tried heat, striking the bolt, etc. 

 

Looking for any further advice/wisdom!

 

Thanks

 

 

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#2 nicklouse

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Posted 12 February 2020 - 03:57 PM

Keep applying force and drink tea. Apply more force. Drink more tea. Go to bed apply more force until it comes off. It may take a week.

 

make sure the drive bolt is well lubricated. A finer thread would be better. And make sure the flywheel is locked.



#3 nicklouse

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Posted 12 February 2020 - 03:58 PM

Just a thought. You have removed the washer and you have made an insert so the bolt presses on the crank only.



#4 detroitmini

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Posted 12 February 2020 - 04:04 PM

Just a thought. You have removed the washer and you have made an insert so the bolt presses on the crank only.

 

Yeah took and old head bolt and cut it down as a push. I have also made sure to remove the lock washer (thick round plate with ridge to lock together crank and flywheel).



#5 nicklouse

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Posted 12 February 2020 - 04:08 PM

 

Just a thought. You have removed the washer and you have made an insert so the bolt presses on the crank only.

 

Yeah took and old head bolt and cut it down as a push. I have also made sure to remove the lock washer (thick round plate with ridge to lock together crank and flywheel).

 

Good. Then all you need is patience. A big air gun can work but the threads look too corse for it to really help.



#6 Twincam

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Posted 12 February 2020 - 04:25 PM

Once I torque mine up, i usually give it a nice whack with a hammer to help it along.

#7 andyapanel

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Posted 12 February 2020 - 04:52 PM

I suspect you may end up buying this:

https://kentautodeve...flywheel-puller

 

Good luck with it; as has been mentioned, lots of tea and telling it you are off to do something else may deal with its sulks.



#8 nicklouse

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Posted 12 February 2020 - 05:26 PM

a comparison of some old over the shelf pullers and something a bit more Trade.

av28DeH.jpg


 



#9 GraemeC

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Posted 12 February 2020 - 05:26 PM

Do you have the plate exactly parallel with the flywheel?

Try making the centre bolt much shorter.  Its too long to get an effective shock to the flywheel when you whack the head of that bolt - it'll just bend and absorb the force. then a good head on belt with a 7lb sledge hammer.

 

 

As said a finer thread of larger diameter on the main bolt would be better. 



#10 FlyingScot

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Posted 12 February 2020 - 06:19 PM

a comparison of some old over the shelf pullers and something a bit more Trade.

av28DeH.jpg

 

Ah one of John’s- I have one of those and it works 100 percent of the time.

 

FS


Edited by FlyingScot, 12 February 2020 - 06:20 PM.


#11 A-Cell

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Posted 12 February 2020 - 07:17 PM

The one you have made with the small diameter has insufficient leverage.maka mechanical advantage. As others have said you need a larger diameter and a finer thread.
I can highly recommend the John Guess puller.
http://www.guess-wor...play.htm?id=501

#12 Magneto

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Posted 12 February 2020 - 07:25 PM

I agree with the Guess puller - it's a mother!

 

But since you're already torqued up, maybe a couple of sharp blows with a 3 pounder to the edge of the flywheel from the backside thru the starter hole? Then turn 180* and do it again?


Edited by Magneto, 12 February 2020 - 07:26 PM.


#13 detroitmini

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Posted 12 February 2020 - 10:06 PM

Anyone know the diameter of the bolt on the Guess puller?



#14 nicklouse

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Posted 12 February 2020 - 10:11 PM

Anyone know the diameter of the bolt on the Guess puller?

Not to hand but the head is ball joint sized tool. So about 38mm, 1 1/2”


Edited by nicklouse, 12 February 2020 - 10:11 PM.


#15 nicklouse

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Posted 12 February 2020 - 10:13 PM

38mm spanner on there

uFVtGn8.jpg


 






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