A couple of pictures that might start a conversation....

[5 Horse Fan]

2 different engines....

 

[5horsebriggs]

Whats with the second pic i cant tell what it is:laugh:

 

[vwfan79]

2 different engines....

Are you making a horizontally opposed twin cylinder Briggs?

 

[5 Horse Fan]

Are you making a horizontally opposed twin cylinder Briggs?

No, I just thought the condition of these two engine blocks was interesting.

The first one is NOS, but was sort of neglected and I knew before buying.
The second picture was a surprise when I discovered it.

 

[5 Horse Fan]

Whats with the second pic i cant tell what it is:laugh:

I think if you look at the full size picture you can figure out what is wrong.:thumbsup:.......unless your joking :doah:

 

[5horsebriggs]

Is it a briggs that was bored iver only half way down?

 

[5 Horse Fan]

Is it a briggs that was bored iver only half way down?

LOL !!!! Good guess, but no.:smile:
I should have mentioned that there is a compression ring about halfway down the cylinder.

 

[5horsebriggs]

Is that 2 cylinders put together?

 

[5 Horse Fan]

Is that 2 cylinders put together?

No, but I guess I will tell you my theory.
There are 2 deep gouges in the cylinder wall.
My guess is that it was caused by a missing wrist pin clip and a wandering wrist pin.

 

[Hogville]

Hard for me to see exactly what's going on... but I see a lot of light under that ring. The end gap clearance look pretty tight though, not sure what the spec is on it.

 

[5 Horse Fan]

Hard for me to see exactly what's going on... but I see a lot of light under that ring. The end gap clearance look pretty tight though, not sure what the spec is on it.

Yes, the ring gap is aces because that engine is NOS.
Well, it was NOS until someone did a test run and converted into a smoke machine. :facepalm:
My theory is that one of the wrist pin clips was missing during assembly and cause the wrist pin to excavate the cylinder.

 

[5 Horse Fan]

I thought I put this picture in the thread already....

 

[The Restore Kid]

NOS = New, Obliterated, Slightly.. :laugh:

 

[5 Horse Fan]

NOS = New, Obliterated, Slightly.. :laugh:

:laugh:

To be more specific, I think it was a display model.

 

[Stangrcr1]

Sleeve would fix that...

 

[Boomstick]

I thought I put this picture in the thread already....

OWWWWWWWWWWWW :doah:

 

[MB165]

Yes, the ring gap is aces because that engine is NOS.
Well, it was NOS until someone did a test run and converted into a smoke machine. :facepalm:
My theory is that one of the wrist pin clips was missing during assembly and cause the wrist pin to excavate the cylinder.

Wow, I agree, somebody forgot a clip.
Is it too deep to clean up with a .020 overbore?

 

[Boomstick]

If that's not an IC, I don't know if you could get away going .020'' over. I don't quite think a .020'' overbore would get all the way through either.

 

[5 Horse Fan]

Wow, I agree, somebody forgot a clip.
Is it too deep to clean up with a .020 overbore?

Well, If I remember right 0.010" oversize is technically 0.005" off each side.
It is an aluminum cylinder and I'm guessing the damage is about 0.020" deep or more.
That could mean I would need to sleeve it or go 0.050" oversize.

 

[MB165]

Yup .02 over only gets ya ten around, that one probably came off the line at 4:45 on a friday....:laugh:
I think you can still get sleeves from dynocams, are you going to save it?
maybe??....
http://www.ebay.com/itm/Burris-Raci...aultDomain_0&hash=item338793114f#ht_120wt_880