Help Yanmar 2210 problems head gasket and values etc just pulled here is the video

[Chris Schurmann]

Okay as of yesterday, we thought we had just a head gasket issue . But after pulling the head it looks to be a lot more going on. note the value and nosel imprint in the top of the piston, I guy I bought it from said he had the head reworked 4 years ago. I think it was planed to low on the rebuild and I know it was getting water.

Here is the video of the damage please give me your feed back on as to why i am seeing imprinting on the piston. I not they had over tighten a value and that's why I see it's imprint. video link below shows it all .

https://plus.google.com/+ChristopherSchurmann/posts/D78VMDuRZP3

Thanks
CS

 

[Stumpi]

What does the valve look like? If it and the piston have been meeting it will look smashed like hammered metal. Could just be a a result of the flow patterns inside the head or a plugged nozzle. I would check the valve to piston clearance.

 

[Chris Schurmann]

What does the valve look like? If it and the piston have been meeting it will look smashed like hammered metal. Could just be a a result of the flow patterns inside the head or a plugged nozzle. I would check the valve to piston clearance.

Will do some reading on this thanks for the link , It actually does not look as if it has hit the piston now that I have cleaned them up. may have formed due to the cylinder not firing every stroke.