Topic: Cylinders, removal of...Vol 2.

[jtb]

All righty, then...I poured mighty Marvel Mystery Oil around the studs, and let it soak for 10 days or so.  After a great deal of tugging, grunting and groaning, along with the requisite amount of beer, I have them loose enough to slide a putty knife all the way around on top ot the gasket.  Seems to me that they should just about lift right off.  But no, they won't budge.  What next?

John

[750goes]

Haven't found enough information on your previous post re the removal of Cylinders...
I'm just trying to determine if this was a running engine beforehand..

If the head has been removed, what are the condition of the Pistons.

If the seal is broken all way round as you say, give the crank a turn, and watch if the pistons move up and down in the bore- - if they do fine........ if they are jammed and not moving then they may be seized in the bore, and might need some penetrating oil and some gentle persuasion to get them to move.....

I'll ask the question also - are all studs removed??

[jtb]

engine is not siezed.  Studs have not been removed.  Crank turns easily.  Should I remove the studs?
Thanks,

John

[750goes]

do you see the tops of the cylinders..... head is removed, cam shaft, rockers etc???

[scunny]

sounds like there is still a bolt,cam chain etc still holding it.

[jtb]

head is gone to visit Mike Rieck, according to manual, all bolts, nuts, etc are removed.

[750goes]

thanks, that helps

If you can slide a putty knife or something thin in between the lower crankcase and the barrels, and do this all the way around the gasket, then it should only be a matter of wriggle wriggle wriggle to remove it....

stand with legs over the engine (I presume it is on the floor), and with one hand at each end of the barrels lift alternately from left to right & back to front, there should be some movement after doing this if all studs & bolts have been removed. There isn't anything else to undo...

When it does start to lift up, be careful, if you have a broken ring it could fall into the crankcase.

Its then just a matter of continuing this processs until the barrels come off.

When the barrels are up abount an inch or so,,, pack a clean cloth around the conrods and cover all open areas, just in case anything else drops out...

Don't strain and break a gonad either............

have another beer, probably a bit of sweat to go...

[jtb]

Thanks, goes.  That's about what I thought.  I was hoping someone could tell me the easy way.  Anyway, before I start again, I'll have that beer, and probably another for you

John

[750goes]

Doctors advice and prescription states -

One to be taken immediately before, and a second to be swallowed in full immediately after removal of offending barrels. No further treatment is necessary unless patient needs to self prescribe unlimited repeats of above procedure. If however this continues until medication has been exhausted, patient is required to sleep for several hours to negate any side effects of medication.

Otherwise imbiber could be known as "piston drunk" (sorry this relates to another thread- speaking chinese in 5 minutes) couldn't help myself.

good pulling

[oldbiker]

The last time I removed the top off my motor (CB400), the barrel would not lift easily and I found there was an accumulation of crud in one of the stud tunnels stopping it from coming off. You might be able to break up the crud with a length of welding wire if that is the problem.

[bryanj]

400 and 500 have "open" studs and secret addittive (SH1T) buids up in the holes in the clyinder meaning that the "wasted"  section of stud will slide through but the wider threaded part wont and the only method i ever found was to keep working the barrells up and down untill the threaded part of the stud "reamed" out all of the crap. Its been so long since i worked on a 750 i cant remember what they are like

[jtb]

Bryan, you called that right.  There are 4 studs that are really susceptable to the secret additive.  One of them was really bad.  Anyway, the cylinders are off, it took much less beer than I had allotted, and it's on to the next step.  Thanks all for your help, as usual it was stellar.

John