Exhaust Port Images-Problem?

[TNT79Bronco]

I am looking at a replacement engine for my 1999 911. Had an engine failure. Apparently this replacement engine has 51k miles on it. The exhaust headers were removed, and these are the images from the 6 ports. A couple look weird.  What would cause this?

 

 

[DBJoe996]

That's a lot of broken manifold bolts!  You have a lot of work ahead.  1,2,3 look abnormal, like coolant or something got in there.  3 looks wet maybe from a bad plug/coil?  4,5.6 are black with carbon and look more normal.  I would investigate a lot more of  this engine before installing it.

[judgejon]

have you already purchased this engine as a replacement?  if not, you might want to think twice about it.

good comment above.  

Looks like something might have torn loose in there.  Maybe lots of red hot running at top end on a track somewhere.

the word that comes to me to describe what your pictures show is "toast."

good luck.

[JFP in PA]

1 hour ago, TNT79Bronco said:

I am looking at a replacement engine for my 1999 911. Had an engine failure. Apparently this replacement engine has 51k miles on it. The exhaust headers were removed, and these are the images from the 6 ports. A couple look weird.  What would cause this?

 

 

 

Carbon build up is common, but the corroded ports are of concern, they look like coolant was in them at some point.  I would hand rotate this engine, clock wise only, and do a leak down on it before installing it.

[TNT79Bronco]

Yep. The guy pulling the engine twisted a lot of the bolts off. I have bought the engine and he is willing to refund me the money I spent. My fear is that it is a cracked cylinder or a cracked head. Will an oil analysis tell me much?

[JFP in PA]

23 minutes ago, TNT79Bronco said:

Yep. The guy pulling the engine twisted a lot of the bolts off. I have bought the engine and he is willing to refund me the money I spent. My fear is that it is a cracked cylinder or a cracked head. Will an oil analysis tell me much?

 

Possibly, but not guaranteed.