Topic: Big Ouch!

[kmb69]

How not to remove a stuck CB1100F cylinder!   

[calj737]

I can buff that out 

[scunny]

WD40 then the buff, good to go. WTF happened there ?

[Retro Rocket]

I see two 550 twins there, what seems to be the problem....

[MoMo]

never been a situation JBweld can't cure.    What happened?

[RAFster122s]

Suppose to inject the nitrous in the cylinders, not the crankcase!

[ekpent]

 Cal or Frank can weld it good as new !!

[Stev-o]

Wow....

[calj737]

Cal or Frank can weld it good as new !!

Now you're just trying to get somebody thrown under a bus! 

[strynboen]

did your toolmachine take damage...this is not a vay to use  it..heat and hard hammering.. vill loose the rust not a torque pull..---

[Jerry Rxman Griffin aka MuthaF'er]

You need to find a new machinist Leroy 

[kmb69]

Well......First time in my life I have ever seen such a thing! 

A design flaw by Honda in my humble opinion. The 4 studs between 1-2 and 3-4 have openings in the head that allow water/debris to collect at the cylinder level with no way to drain or flush. After 34 years, the cylinder can become bonded, like ONE, to those 4 studs. This particular one sat in Aero Kroil for over 3 months. It would not budge. I was able to remove all the other studs - no problem. I tapped 1/2-20 threads in all the surrounding cylinder holes. Then put set screws in the case threads. Started cranking down on the 1/2-20's till it let go and boy did it! Hard to imagine just how much pressure was applied but it was obviously a lot. 

Machine tool all OK. I was using a tooling plate made for SOHC cases to hold it. Rather expensive workbench but solid. But the machine tool is the answer for the next one that's stuck. Need to saw those 4 studs off close to the head and machine them out completely. Fixing to break tear disassemble another one today and see what we get. The center 2 studs between 2 and 3 had no support under them and I am somewhat concerned that the cases on this one could have been cracked/damaged in the process.

You should see the contraption the guys down in NZ use for this problem. However, I seriously doubt it would have worked on this one. 

[kmb69]

You need to find a new machinist Leroy 

Great advice! Thanks, Spanky 

[ekpent]

Well......First time in my life I have ever seen such a thing! 

A design flaw by Honda in my humble opinion. The 4 studs between 1-2 and 3-4 have openings in the head that allow water/debris to collect at the cylinder level with no way to drain or flush. After 34 years, the cylinder can become bonded, like ONE, to those 4 studs. This particular one sat in Aero Kroil for over 3 months. It would not budge. I was able to remove all the other studs - no problem. I tapped 1/2-20 threads in all the surrounding cylinder holes. Then put set screws in the case threads. Started cranking down on the 1/2-20's till it let go and boy did it! Hard to imagine just how much pressure was applied but it was obviously a lot. 

Machine tool all OK. I was using a tooling plate made for SOHC cases to hold it. Rather expensive workbench but solid. But the machine tool is the answer for the next one that's stuck. Need to saw those 4 studs off close to the head and machine them out completely. Fixing to break tear disassemble another one today and see what we get. The center 2 studs between 2 and 3 had no support under them and I am somewhat concerned that the cases on this one could have been cracked/damaged in the process.

You should see the contraption the guys down in NZ use for this problem. However, I seriously doubt it would have worked on this one. 

  Same problem a lot of guys run into on the Suzuki GT750 Water Buff trying to pull the cylinders with corrosion on the studs etc., though I have not seen one break but there is a plate that can be made to force them off. Pretty fragile around the cam chain tunnel apparently, sorry that it happened to you. Hopefully a replacement won't be too difficult.

[754]

Water buffalo, yep same problem..
Massive rust on them two studs on the leftt..

[Desert-SOHC]

that sucks

[RAFster122s]

Well, heat the cylinders until they drop the liners and then put it in the scrap aluminum recycling pile along with that bottom case set...
Scrappers should give you about $0.50 for it

[eigenvector]

Man that would really ruin my day.

[kmb69]

Well, heat the cylinders until they drop the liners and then put it in the scrap aluminum recycling pile along with that bottom case set...
Scrappers should give you about $0.50 for it

Yep, the liners are salvageable. Cases may be OK too - fingers crossed. The cleaned up top case fits nicely on it's mate. All but the 2 center studs, that flap in the breeze, were solidly supported over the mains. Gotta do a dye penetrant on the top to make sure no cracks.

Gonna send a couple sets off to Nils to get vapor blasted and then do the DPI. A bit worried the vapor blasting might hide any cracks due to the microscopic peening. What ya'll think? 

Man that would really ruin my day.

It did, but nobody got hurt so we live to fight another one. 

[kmb69]

Any body got a good CB1000C or CB1100F cylinder for sale?

[Bill/BentON Racing]

LMAO,  good one Jerry, seems I'm not z only one capable of breaking things! Lol, Damn Keith, you just had to outdo me...haha, think you mighta come close! At least mine was IC !!!!! Wow , Bill

[RAFster122s]

Anyone try using parrafin wax to see if the hot wax would get enough penetration to do its job?  Would be difficult to immerse it in a pot of hot wax, not mention take a heck of a lot of wax...  But a bake in the oven and melting the wax from the heat and feeding/ applying as much as it would take might allow you to have it suck more wax inside. Heat it up apply, bake some more, apply, repeat.....

[calj737]

Honestly, Keith, if this is a known issue, you might try and light a TIG torch on just enough lay heat it up. That alone might get the rust to release before damaging the jugs.

[Flyin900]

I will check if I still have a CB1000C set of barrels still in the garage attic? They would need to be bored at a minimum or the cylinders replaced as the motor had 75K kilometers or 50K miles and the cylinders will be worn with that mileage.
I wouldn't want much for the barrels although am in Canada and shipping will be expensive.

[kmb69]

I will check if I still have a CB1000C set of barrels still in the garage attic? They would need to be bored at a minimum or the cylinders replaced as the motor had 75K kilometers or 50K miles and the cylinders will be worn with that mileage.
I wouldn't want much for the barrels although am in Canada and shipping will be expensive.

Sounds good. Already planning to replace the sleeves. Pretty sure the 1000's and 1100's started with the same cylinder casting. Need to make sure they are the ones without air passages between 1-2 and 3-4.