SOHC.co.uk Forums > CB500/550

Cylinder block stuck

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s7paul:
Hi all.  I've just removed the head from my CB500 and would like to remove the cylinder block too.  However, it seems totally stuck.  I've tried using the two pry points but this just results in bending my biggest screwdriver.  There's not really anywhere else I'd be happy to apply too much pressure, as I know how delicate the fins are.  So, does anyone have any useful tips for shifting a stuck block?

K2-K6:
I've seen but never used this way before, you'll have to reason it out for yourself as to risk.

Plumbing maintenance pipe blockers, basically two metal discs with a bolt through center sandwiching a rubber doughnut. When you tighten the bolt the rubber doughnut squashes out to seal a pipe, if you put it in the bore with a piece of wood on piston top and rotate the crank with a spanner it can be used to lift the block at alternate ends to break free the gasket or if pistons and crank removed you can put it in the bore and gently tap with a dowel from the bottom end.

matthewmosse:
Gentle but firm taps with a hide or rubber mallett onto the finsgenrally gets things moving. there are heavyer bits where bolts go though and with perseverence things genrally come free

Spitfire:
If it's bending a large screwdriver I'd look for hidden bolts that are still in place.

Cheers

Den

z1100r:
I agree somethings not right. If the heads off though there are no bolts. Hmm weird..how big a screwdriver.....?

 It should be BIG BIG. Too big to do up your house door hinges and imposible to bend without serious force.

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