Engine Overheat and.... Next Steps

[use2bn83]

I read somewhere that I needed to make sure both block and head were grounded because arcing between head , block and fire ring would show as pitting in the softer head alloy. Or perhaps dissimilar metals corrosion?

My opinion is that it’s caused by dissimilar metals (galvanic reaction) and the fact the the head, and block grow at different rates so there’s movement between the two.

As long as they are both “in spec” I see no reason that decking one necessitates decking the other. The amounts we’re talking about are very small.

 

[mudgudgeon]

I'd do this before filling it with coolant and running it very much to try to minimize the risk of potentially hydrolocking it should coolant be getting into a cylinder.

Agreed.

My engine hydrolocked when the head gasket failed.
Resulted in cracked crank shaft.

If the cooling system is all fresh and it was still overheating with normal use, leaves head gasket as the main suspect IMO.

 

[mudgudgeon]

Agreed.

My engine hydrolocked when the head gasket failed.
Resulted in cracked crank shaft.

If the cooling system is all fresh and it was still overheating with normal use, leaves head gasket as the main suspect IMO.

Late to the party. Nevermind

 

[Hidec]

@use2bn83 that head definitely has less pitting than this one, thanks for sharing the pic!

And I heard back from Kiwi Cylinder Heads, super nice guy. The purchase price was attractive, but the shipping cost was 1.2x the cost of the head. I thought it was a typo when they replied!