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B230FT Blown HG = Chunk missing from piston? 700

posted by  AppleTech on  Sun Jan 11 16:37 CST 2009
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last visit: Sun Nov 13 14:40 CST 2011
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So I pulled the head off my 88 turbo wagon since it blew the gasket. I noticed the #2 piston has a chunk missing on the exhaust side - not all the way down to the ring but there is a large piece missing from the edge. My dad thought it might have burned away but I'm not sure... has anyone seen this before?? Also, as this is my first HG job, should I be concerned with the fact that there is a large amount of crusty stuff on top of the pistons? Can I get away with just replacing the damaged #2 piston (assuming the others look good)?

Thanks,
Phil








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    B230FT Blown HG = Chunk missing from piston? 700

    posted by  john sargent on  Mon Jan 12 15:40 CST 2009
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    last visit: Wed Oct 22 09:07 CST 2014
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    Does the piston look like this from above?



    The same piston in the picture looked this when I removed it from the bore.



    I threw the engine away and bought a nice U-Pull It engine for $125. It is still running nicely, and that was five and a half years ago.
    --
    john








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      B230FT Blown HG = Chunk missing from piston? 700

      posted by  AppleTech on  Wed Jan 14 20:29 CST 2009
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      This is exactly what mine looks like - although the chunk is not as big - I'm going to pull it this weekend and we'll see how far down the damage goes. I can't see any scoring or anything on my cylinder wall, so maybe the ring is still intact?








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        B230FT Blown HG = Chunk missing from piston? 700

        posted by  john sargent on  Thu Jan 15 01:55 CST 2009
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        The hole in the piston in my pictures was caused by detonation. Too much boost, summer weather, and cheap gas.

        I think you will be replacing the motor.
        --
        john








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      Beautiful pics!! 700

      posted by  KlausC on  Mon Jan 12 17:28 CST 2009
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      That one is a little too far gone for a bore and ring job :)
      I bet the piston slap was a little pronounced!

      Klaus

      --
      Volvoless. Sold the R. There is now a void...








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    B230FT Blown HG = Chunk missing from piston? 700

    posted by  AMSroadrunner on  Mon Jan 12 04:25 CST 2009
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    last visit: Mon Aug 25 16:43 CST 2014
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    Phil,

    I rebuilt a NA block for school and I was the better part of 2 grand into it before I was done. I might look for a good used block from the junk yard.

    If you are going to get really into the motor it will be worth your time to do it right. (pistons only come in sets of 4), replace all the bearings, gaskets, etc. HOWEVER, before you drop a penny into parts, pull the crank down and the pistons out and drop the block off at a machine shop and have them check it over. Make sure you didn't do something REALLY bad.

    The black to light gray crusty stuff is CARBON i.e. you were running a bit rich; perhaps related to the missing chunk?

    How does the turbo look? Does the exhaust side look like it passed a chunk of piston?

    Andrew







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