Finally managed to get it apart !!

First being happy:


Then the bad news....

The metal pieces got away just by scratching them....  I wonder if they got stuck while I was trying to get the head out..
What is more worrying is the notch in the chamber wall

More details:


Anything that could be done about that  !??!

Quote from: flank on February 13, 2012, 10:58:00 PM
Finally managed to get it apart !!

First being happy:


Then the bad news....

The metal pieces got away just by scratching them....  I wonder if they got stuck while I was trying to get the head out..
What is more worrying is the notch in the chamber wall

More details:


Anything that could be done about that  !??!

Cannot see the pictures?

If it was mine I would just smooth it out. 

How's the top of the piston look?

Ewww, pieces of piston mashed into the head ?

The carbon is nothing, a soak will get rid of it.

Pics of the piston !

Yes the bolts are made of clay!! Honestly tho they aren't the strongest... Had a ton of them strip out when I was working on the gs500e before i sold it...
Only recommendation I have is everytime you remove a bolt or nut or whatever go to your local ACE Hardware or similiar and find a grade 8 or higher chrome bolt to replace it. It will save future headaches....

otherwise http://www.emhart.com/brands/heli-coil are your friend

Iwould just blend those sharp edges in with a small file ,because sharp edges cause preignition when they glow red when running

Quote from: ohgood on February 14, 2012, 06:31:48 AM
Ewww, pieces of piston mashed into the head ?

The carbon is nothing, a soak will get rid of it.

Pics of the piston !

Here is the piston....
Looks clean for me !

Those little peices look like they have been in the head awhile because there is no carbon under them.
Infact they look like valve collets

Quote from: twinrat on February 15, 2012, 10:51:56 PM
Those little peices look like they have been in the head awhile because there is no carbon under them.
Infact they look like valve collets

I was just wondering what the heck those coulda been. lol
good eye!
they do infact look like they are those.
but how the heck did they get there?

i would take the valve buckets off and make sure everything is ok on the top of the valves.

Here is the inside of the metal pieces.

It doesn't look like it is threaded but something else ...

if they have slight hollows on them and taper from top to bottem they are valve collets .how they got in there is any ones guess.

While you have the head off, do a seal check, pour gas into the dishes and see how fast it leaks, if it will leak some gas it will leak a lot of air, if it leaks rebuild the head since you have done 80% of the work already, might as well take it to the machine shop and have them deck it and see if they will take that chip out, it could just be weak steel breaking because of the pressures, or one of those metal flakes got in the quench zone... if you want it fixed right they can weld to that and clean off the excess and make it like new.

Just rebuild the top end, and smooth out the nicks to prevent hot spots, you'll be fine.

I hate trying to split those things. Some motors are nice and have tabs meant for a screwdriver/prybar so you don't have to risk messing up the gasket surface. Sometimes I use some popcicle sticks to wedge in and keep a gap while I work my way around.