Take a look at this case

[Rd]

I split the cases on my recently purchased 90 K5 and found this crack. You can't see any crack from the outside just a small impact mark (rock?).Planning on taking it to a good tig welder next week and have him look at it. What do you guys think?
Sorry for the lousy pics.

[blueoval]

What is at the 10 to 11 O'clock position on the case? 

[Rd]

That is just carbon goo that had not been wiped off yet.

[Polar-Bus]

just a small impact mark (rock?).Planning on taking it to a good tig welder next week and have him look at it. What do you guys think?

Or more likely someone dropped a piston pin circlip down in the case, and just put the engine back together...

[Rd]

Or more likely someone dropped a piston pin circlip down in the case, and just put the engine back together...

That would not suprise me. You think it can be welded succesfully?

[Larry Wiechman]

 That's an easy fix. Caution your welder that sink (A low spot caused by the metal cooling and shrinking) is unacceptable on the sealing surface. It'll be as good as new.
 
Larry

[Rd]

Thanks Larry
That is good news. No sink.