Undo The Nut On The End Of The Crankshaft

932 Views 7 Replies 7 Participants Last post by 5harp3y, Apr 15, 2010

Skov

Discussion Starter · Mar 31, 2010

I need to get that 21mm nut off the end of the crankshaft so I can change my cambelt.

Tried sticking it in 1st, putting the handbrake on and chocking the wheels, but there's too much 'give'/'cushioning' in the drive train.

My back-up option is to stick a breaker bar on it and crank the engine, but that seems just a bit too nasty...

Any other ideas/tips on how to shift it?

Thanks,

-Skov

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tattoo-ron

· #2 · Mar 31, 2010

5th gear,take up the slack, large breaker bar on nut or scaffold pole over ratchet, and pull!! Whatever, I def wouldn't crank over the engine!!! Recipe for disaster and blood. Ensure you plus-gas it for a long while or similar penetrant, pref for a few days

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Billywink

· #3 · Mar 31, 2010 (Edited by Moderator)

you dont necesarily need to remove the big nut to get the pulley off in order to change the cam belt. I think that there are other methods. my last belt change was done by the nice people at Sam Goodwins, and I'm sure that it was changed without removing the crank pulley. Have you done a search on here or the web for alternative methods on changing teh cam belt?

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JohnB

· #4 · Mar 31, 2010

If the sumps off chock it against crankcase wall with a piece of wood (wrapped in clingfilm so no splinters get lost)
Worked for me on many many engines, cant see why it wouldn't work on a 5.

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mx5ash

· #5 · Mar 31, 2010

As said you don't need to take off the belt unless you are doing the waterpump at the same time. You could use the split belt method if its just the belt your doing.

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robmorphet

· #6 · Apr 9, 2010

?15 1/2" bar from machine mart, soaked in wd40 after a small ammount of heat. 5th gear and handbrake on, came off easy. Had been trying with a shorter bar for two nights with no luck. Right tool to do the job helps everytime.

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Skov

Discussion Starter · #7 · Apr 11, 2010 (Edited by Moderator)

robmorphet said:
£15 1/2" bar from machine mart, soaked in wd40 after a small ammount of heat. 5th gear and handbrake on, came off easy. Had been trying with a shorter bar for two nights with no luck. Right tool to do the job helps everytime.

Finally got the bu99er off! 5th gear, repeated doses of WD40 and a bit of persitence did the trick

Now I just need to replace two of my neighbour's breaker bars that I broke in the process...

Thanks all!

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5harp3y

· #8 · Apr 15, 2010

I've given up with manual labour on mine, calling in the big guns!

Impact gun that is!

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