My 6 month spark plug replacement

[CertusExpo]

I only got to pull 1, 2, 5 & 6 but again, #5 was under a layer of moisture and rust was everywhere in the spark plug hole.
#1 and 2 had corrosion on the hex with a bit a moisture #2.

#5
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#2
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Any ideas about all the moisture and corrosion? Those plugs are six months old.

 

[ManUpOrShutUp]

If it was just on the hex and the portion just below it, I would say it's likely just environment (ocean air, northern winters, etc.). With that amount of moisture/corrosion down in the spark plug wells though I would be looking at the head gasket, manifold, and block itself. Sorry if I missed this in any previous threads, but any other symptoms of a larger problem?

 

[CertusExpo]

If it was just on the hex and the portion just below it, I would say it's likely just environment (ocean air, northern winters, etc.). With that amount of moisture/corrosion down in the spark plug wells though I would be looking at the head gasket, manifold, and block itself. Sorry if I missed this in any previous threads, but any other symptoms of a larger problem?

That is all feasible but I'm in Dallas/FtWorth so the environmental issues shouldn't be a variable.
I will explore the gasket/crack option (unfortunately).

 

[CaperCanadian]

You wouldn't happen to spray down your engine with a pressure washer do you?

 

[CertusExpo]

You wouldn't happen to spray down your engine with a pressure washer do you?

No but I did once a while ago but that was before the original plug change but since that plug change, no.