Has anyone got a good idea for slackening the front crankshaft nut on an engine that is on the bench !! I have a good fitting socket , but when I apply some leverage the crankshaft just turns . How can I hord it without damage ? ( on good thing is that it has unsized the no 4 piston )
Regards Phil
crankshaft nut
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paulhumphries
- Minor Legend
- Posts: 1010
- Joined: Thu Apr 28, 2005 9:59 am
- Location: Werrington, Stoke-on-Trent
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Impact wrench is easiest way without locking crank.
I've an air operated one but find a cheap £10 one, intended for car wheels, that works off 12v volts works just as well for "shocking" nuts / bolts such as crank items.
This sort of thing but from cheaper sources than Machine mart -
http://www.machinemart.co.uk/product.asp?p=060810610
Paul Humphries
I've an air operated one but find a cheap £10 one, intended for car wheels, that works off 12v volts works just as well for "shocking" nuts / bolts such as crank items.
This sort of thing but from cheaper sources than Machine mart -
http://www.machinemart.co.uk/product.asp?p=060810610
Paul Humphries
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Alec
- Minor Legend
- Posts: 2148
- Joined: Thu Apr 15, 2004 7:29 am
- Location: Oswestry, Shropshire
- MMOC Member: No
Hello Phil,
if the flywheel is still fitted, make up a small 'S' shaped bit of flat steel with a hole either end, put a nut and bolt through the strap and the engine backplate, then fix the other end to the clutch fixing bolt on the flywheel.
Otherwise, jam a big flat screwdriver between the ring gear and the starter motor hole. If the flywheel is off, put two bolts back in and put a big screwdriver or bar of some sort to hold the crank.
Alec
if the flywheel is still fitted, make up a small 'S' shaped bit of flat steel with a hole either end, put a nut and bolt through the strap and the engine backplate, then fix the other end to the clutch fixing bolt on the flywheel.
Otherwise, jam a big flat screwdriver between the ring gear and the starter motor hole. If the flywheel is off, put two bolts back in and put a big screwdriver or bar of some sort to hold the crank.
Alec
crankshaft nut
Is this nut left hand or righthand ?, from the rotation of the engine it should be left hand , but the manual I have makes no mention of it
Phil
Phil
It's normal thread - so starting the engine would tighten it. So anticlock to undo it. You can wedsge a block of wood between the crank and the block wall once the sump is off. These things can be very difficult to undo - I had terrible problems with a Mini one a few months ago - eventually had to heat it and allow to cool. Even then it took a lot of 'shocking' with a very heavy hammer to shift it.
crank shaft nut
Ok done it this afternoon useing the bolt flywheel to the backplate method Thanks all
Phil
Phil