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red or green · 08-24-2021, 06:09 PM

Not uncommon for a valve to stick open when setting for a long time.
You can verify by pulling the side cover or you could be able to look into the cylinder thru the plug hole. I have a buddy that got a real good bore scope attachment for his smart phone, cheap.
The problem is that the crud that is hanging the valve is on the top of the stem. Pulling the manifolds will let you get to the valve stems.
I'd soak, using Seafoam on the valve stem(s) to free it up. It eats carbon...Marvel Mystery oil too.
That's my plan of attack though I might just go to pulling the manifolds first and see if it is obvious that a valve stem isn't moving and save a side cover gasket.

Good luck

08-24-2021, 06:09 PM	#2
red or green Junior Member Join Date: Aug 2011 Location: On a rock pile, Tijeras NM Posts: 10	Re: "It ran well when I parked it!" Not uncommon for a valve to stick open when setting for a long time. You can verify by pulling the side cover or you could be able to look into the cylinder thru the plug hole. I have a buddy that got a real good bore scope attachment for his smart phone, cheap. The problem is that the crud that is hanging the valve is on the top of the stem. Pulling the manifolds will let you get to the valve stems. I'd soak, using Seafoam on the valve stem(s) to free it up. It eats carbon...Marvel Mystery oil too. That's my plan of attack though I might just go to pulling the manifolds first and see if it is obvious that a valve stem isn't moving and save a side cover gasket. Good luck