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Piston damage from glow plug

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Old Jan 10, 2023 | 05:36 AM
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Piston damage from glow plug

Hey guys
i got this junkyard engine and started to reseal it and pulled the heads and found this. Looks pretty bad but I’ve seen a lot of people say some damage is ok, can I just blend this damage down smooth and run it? They say this engine ran fine a month ago when they pulled it.


I have a old 6.9 that ran without oil pressure and destroyed the bottom end, is it better to use a piston from that engine with new rings? I just get nervous swapping used pistons, I feel like that can have more issues down the road.
 
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Old Jan 10, 2023 | 06:37 AM
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From: Edmond, OK
If you aren't taking the engine to the machinist, I would just re-use the piston, install new rings and hone the cylinders.
 
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Old Jan 10, 2023 | 09:28 AM
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If youre not doing a complete rebuild, I'd just blend out the damage with an air-grinder with a sanding disc on it. Dont even bother to pull the piston out; just blend it in-place. The cylinder walls look pretty good.
 
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Old Jan 10, 2023 | 09:47 AM
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Originally Posted by Prototypemech
If youre not doing a complete rebuild, I'd just blend out the damage with an air-grinder with a sanding disc on it. Dont even bother to pull the piston out; just blend it in-place. The cylinder walls look pretty good.
The walls are very clean, the reflection is deceiving but they are clean.
 
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