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I have a broken Spark plug in a 2SZFE engine. Oil level is not changing. Does it means the piston is safe?

There’s a spark plug part in the first cylinder because previous owner chose a low cost model not adapted to higher temperature of lpg. There’s a sealing problem on exhaust but not on admission.

The cylinder head might be damaged, but since there’s no specific sound (the engine can run on 3 cylinder) and the oil colour doesn’t change and the oil level doesn’t change, is it safe to assume the cylinder or piston ring don’t need to be replaced ?

Pᴀᴜʟsᴛᴇʀ2
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user2284570
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1 Answers1

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You can't really assume anything regarding the state of the internals until you get it open and inspected.

If the engine has been run for any length of time without spark there could be significant damage to the piston and ring from being repeatedly covered in unburnt fuel. And of course any impacts with bits of the broken plug (even relatively small flakes) could have done significant damage also.

motosubatsu
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