Smoking. Cracked ring...??? What to do

[chart1]

Come on... I just want hear the outcome and then it will be all done. It's like watching a good movie and you can't wait to see how it ends. Cant we all just get along!!!!

[thejumpsuitman]

I just got 4 pics from the mechanic at W.W. Williams.  Here they are...

[luvrbus]

She has had water in there before looking at the liners has been a little warm

good luck

[Geoff]

So, what do the other three clyinders on that bank look like?

[JohnEd]

The piston top and head look like they have been shot peened or blasted with gravel.  Did the chunk of piston do this or is it some sort of normal?  If it was the piston and it got the entire innards surface hammered then why are there carbon deposits on the valves?  And I thought the valves were broken/bent and that jug had zero compression.  While it looks bad I would think that cylinder would build at least a little compression.

Water damage and "hot" would seem to have happened prior to JSM taking possession or am I missing something Clifford?

john

[challenger440]

Well, I'm not a diesel mechanic but looks like maybe a new liner, piston, mill head and fix the valves, and your back on the road.  That's assuming that the piston parts went out the exhaust.   Did they give you their thoughts?  Have they removed the valves yet?  Hard to know if the seats are damaged. I'm pullin for you.  jm
   

[thejumpsuitman]

Well, I'm not a diesel mechanic but looks like maybe a new liner, piston, mill head and fix the valves, and your back on the road.  That's assuming that the piston parts went out the exhaust.   Did they give you their thoughts?  Have they removed the valves yet?  Hard to know if the seats are damaged. I'm pullin for you.  jm
   

They said the exact same thing, so that's the plan.

Marc

[chart1]

It looks to me the engine got hot and was shut off with that piston up top and the ring bonded to the liner as it cooled. Then upon restart the downward motion of the piston broke off a peice where the ring was siezed up. Just a thought. There are no marks where it hit the valves.HUH?

[luvrbus]

Williams will probably check the rod anyway but I would replace the rod also after all it's only money Marc lol


good luck

[JohnEd]

I don't see where the valves are damaged.  Is it possible that the engine had the piston chunk come off, was taken down and the min was to replace the valves to "get it out the door"?  If water was a problem could the piston crown have been broken by hydraulic lock?  Hydraulic lock would approximate too much either....no?

I know it must seem to some that we are "beating a dead horse", and I understand that eval, but, understanding the full scope of the thing and, very importantly for those of us not savvy in matters DD, what are the lessons learned?

hank you all,

John

Chart's theory seems to have merit.  No?  does that sort of thing happen often to an overheated engine?  Wouldn't you get the same result if it "seized" anywhere on the down stroke?  Why only at TDC?

John

[Van]

First hand experience with an over heated mill, you'll crack the head. On mine, the pistons and rings were fine!  Wonder if something might have been floating around in the air box and...

[luvrbus]

2 different animals here Van he has a 71 dry liner heads are different the 6v92 will crack a head if the forecast in Vegas says 118 today lol

[chart1]

It looks to me that those are different cylinders the one that is busted doesn't show the fuel burn pattern on top of the piston.

[thejumpsuitman]

They faxed me this....

[DMoedave]

No word on the credit from the previous work? If you can get the tow $'s back those 2 figures would help alot. Got our fingers crossed. good luck.