The head is off...

[Anonymous]

I just finished taking the engine head off. There were a few problems:
First, the exhaust bolt broke. That should be no problem prying that one out. But, then when I was removing 12 nuts holding the head down one of them came out seized to the bolt. The bolt did not break but I dodn't know how to put it back in. Do I have to take apart engine even further or is there a way to screw it back in?

Also, what is the best way to clean up the residue from:
- valves
- both side head surfaces.
- cylinders themselves...

Thank you for any responses, I really appreciate your help!

[Anonymous]

HELLO!
I suggest that you should leave the nut on the top of the bolt (to help you screw it back into the engine), and then apply some Loctait (or similar thread locking stuff) on the bottom-end threads. Then screw it back down into your engine. Hopefully this will be the cure for your problem.
Of course it would be better if you can lift off the cylinder-block as well. But then you might get a problem when refitting the cyl-block (piston-rings) if you don't have the right tool for this operation.

GOOD LUCK!


Holen
(Sorry 'bout the spelling of LOCT.I.T.E, but it shows only ###) :?

[Anonymous]

CLEANING



I've got an excellent tip from a mechanic that I know. Take the cyl.head apart (valves, camshaft(s), rocker-arms and so) and soak it into plain cold water for a while. Over a night or two. This will make the carbon deposits in the comb.chambers and exhaust ports loosen up, and it will easily be removed. I've tried it myself and it works!
BUT I have to remind you that this operation requires a valve job afterwards, due to corrosion
Of course you can go the other way and give that old wire-brush the job. Leave the valves in place and go for it.

GOOD LUCK again

Holen

[Anonymous]

thanks

Holman,

Thanks for the advice. I don't think I want to rebuild the head. I'll just try some regular engine degreser. The bike was runing fine , with the exeption of the oil leak, so I dont want to mess with what worked just fine before. But I will try what you said about the bolt.

What I was thinking is some lock tight, then spray some wd40 on the nut, and hopefully it will losen up.

Thanks
Toolman

[Mr. Jiggles]

To get the seized nut off of the bolt try threading two more nuts on the end of the bolt opposite the end with the seized nut. Back the inside nut out while threading the outside nut in. Tighten against each other using wrenches. This will give you a way of securing the bolt in a vice, for example, allowing you to work on the seized nut. Once off you can use the same two-nut approach to screw the bolt back into the case.

Hope this helps.

Jeff