B18B Burnt Exhaust Valve Problem

[a.pezzuto]

I completed a compression test which showed that cylinders 1,3, and 4 had compression of 180psi and cylinder number 2 had a low compression reading of 150

Upon disassembling and removing my b18b cylinder head, i noticed that 2 exhaust valves on one cylinder (number 2) were of an off white colour compared to all the other valves being a charcoal colour, and also the piston in this cylinder (number 2) is dry compared to the other pistons as show in the picture also.
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I'm unsure what has caused this problem and what will need to be fixed/ replaced to fix the problem

[iNfusi0n]

Could possibly be coolant burning to make piston that colour.

Or could be really rich mixture?

[mocchi]

maybe your cyl 1-3-4 is showing wet compression test. so maybe 1-3-4 is leaking oil
only 2 is dry compression, not leaking oil.

http://www.ozhonda.com/forum/customavatars/avatar11984_24.gif

[a.pezzuto]

yeahh the oil control rings were gummed up so that might have been part of the problem, i think it might be that the cylinder was running lean as the injectors where badly carboned up
how will the car running rich cause this problem? as i also suspect the car might be running rich as its using alot of fuel