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Author Topic: CB750 stuck cylinder head/block  (Read 3409 times)

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Offline Monk

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CB750 stuck cylinder head/block
« on: April 07, 2011, 06:05:02 PM »
This is a first-time rebuild for me (CB750).  The engine dismantle has been going well until now.  I can't separate the cylinder head from the cylinder block.  I have removed 16 nuts, 4 cross-head screws and 2 bolts but the two halves are firmly stuck.  The Haynes manual I am using says there are 5 bolts to remove but I can't find them anywhere (only 2).  What am I missing? I read a similar thread about a CB550 but I never saw a resolution.  If anyone can give assistance I would greatly appreciate it.
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mbspark

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Re: CB750 stuck cylinder head/block
« Reply #1 on: April 25, 2011, 02:37:06 PM »
Any luck with this?

I'm stuck at the exact same point on my 78 cb550.

I've removed 12 bolts and 2 others according the factory service manual. I see no others, but the cylinder head will not give at all. I swear I could pick up the bike by it.
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Offline OneWheelDrive

  • A journey of 1000 miles starts with your first carb overhaul.
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Re: CB750 stuck cylinder head/block
« Reply #2 on: April 25, 2011, 03:13:40 PM »
On the 550 there are 4 black rubber condom looking sealing disks/pucks that when removed will reveal 4 more nuts to loosen.
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1975 CB550 cafe
1971 CB500 stocker
2008 Ducati Hypermotard 1100S *sold*
1973 CB350F *sold*
1975 CB550K Project "Keeper" *sold*
2010 Ducati Monster S4RS *sold*
1976 CB360T *sold*
1974 CB550K *sold*
1973 CB750K *sold*
1978 CB550K *sold*
2007 Vespa LX150 *sold*

mbspark

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Re: CB750 stuck cylinder head/block
« Reply #3 on: April 27, 2011, 07:44:28 AM »
Got mine apart! I had all the bolts taken care of, but what worked for me was just using a putty knife going around the old gasket until I found a soft spot in the old head gasket and then gently used a flat head and hammer to work the two pieces apart.

The biggest thing I was missing....patience :)
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