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Discussion Starter · #1 · (Edited)
I still think that I might have a cracked sleeve or bad head gasket, slow coolant leak (3 weeks between low coolant messages) so I took a peek with a scope while changing plugs today, no obvious coolant in the combustion chamber but what the heck is this black thing in cylinder 1??

Cyl 3 is the one I suspect has an issue (occasional P0103 error misfire in cyl 3). Anyhow, I thought this was interesting, perhaps I should get a life :)


 

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is that black thing an object or an indent? dont our pistons have a small indent to clear the valves? or am i remembering wrong?
 

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Yea looks like a notch on the top of it. 2 of them but one is more visible.

the pistons should have 2 notches on opposite sides I believe like so.
 
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