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How To Undo Camshaft Bolt With Engine Stripped.


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#1 noeman

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Posted 03 February 2019 - 05:24 PM

I've taken my engine out and tripped it. I want to take off the camshaft bolt to change the chain etc. But obviously everything just turns when I try to undo the bolt. I have the flywheel off too, so I can't hold it still by that. What can I do to steady it to undo?

Edited by noeman, 03 February 2019 - 05:25 PM.


#2 Steve220

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Posted 03 February 2019 - 05:26 PM

Put the flywheel back on and lock it.

#3 nicklouse

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Posted 03 February 2019 - 05:31 PM

sure there are some holes you can put a bolt through.



#4 noeman

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Posted 03 February 2019 - 05:55 PM

A bolt through a hole in the camshaft gear? O tried that and the block just toppled over. I guess I have to steady that too.

#5 GraemeC

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Posted 03 February 2019 - 06:23 PM

It shouldn't be that tight that it undoing it would cause the block to topple.

 

Is the gearbox off?  If so a piece of 4x2 timber between the crank big ends and the block wall.



#6 noeman

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Posted 03 February 2019 - 09:45 PM

Yes the gearbox is off too. I did think putting something inbetween the crank. I've put it away for tonight. But gonna have another crack at it tomorrow.
Cheers guys.

#7 Dusky

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Posted 03 February 2019 - 10:09 PM

A screwdriver through one of the holes, wedging against one of the triangle plate bolts.

#8 wile e coyote

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Posted 04 February 2019 - 09:20 AM

My fave trick - mainly for the huge nut in the gearbox, but should work here too is a couple of 6' lengths of 4 x 2"  placed top & bottom and a pair of rachet straps tightened right up - this would give you the stability needed to put some decent leverage on  and lock the crank  at the same time if positioned right......



#9 DeadSquare

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Posted 04 February 2019 - 09:48 AM

It shouldn't be that tight that it undoing it would cause the block to topple.

 

Is the gearbox off?  If so a piece of 4x2 timber between the crank big ends and the block wall.

 

 

If this piece of wood is about 36", you can hold it with one hand, with the cam spanner in the other to maximise your effort.

 

This nut shouldn't be all that tight, but if you have a break-away torque wrench with a square drive that can be inserted either side, insert it the "wrong" side, set it about 100 lbs and as it breaks away its effect is like an impact driver.

 

I always use this method, with 150lbs, on the flywheel bolt.



#10 carbon

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Posted 08 February 2019 - 05:50 PM

Rattle gun is the easiet way to get the camshaft nut undone, just make sure you have a really snug fitting socket.

 

You don't need to chock or have flywheel fitted as there is enough inertia in the crank assembly for this to work. Also works a treat for removing the damper and flywheel retaining bolts.



#11 DeadSquare

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Posted 08 February 2019 - 06:19 PM

If you have got the right socket, there is a 230volt impact wrench on ebay for £49.99






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