Cylinder condition

kentlik · #1 12-23-2021, 11:23 AM

I pulled a jug off my 360 angle valve and just for kicks thought I would get, if possible from photos, input on the condition and repairability of the cylinder.

This is super subjective I understand that but is anything glaringly discernable from these shots?

Thanks!

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jug off by Kent Luttrell, on Flickr[/IMG]

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cylinder 2 by Kent Luttrell, on Flickr[/IMG]

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cylinder2a by Kent Luttrell, on Flickr[/IMG]

Flying8 · #2 12-23-2021, 12:41 PM

What symptoms were you experiencing? High oil consumption, CHT?

edclee · #3 12-23-2021, 03:17 PM

One thing is noticable...there seems to be no crosshatch still visible in the swept surface. You can see the crosshatch in the area below the piston travel. I would guess oil consumption might not be so great.
Ed

rv6n6r · #4 12-23-2021, 08:27 PM

Since you have the cylinder off be sure to look at the cam lobes and better yet stick a borescope in there and take pictures. Since it's impossible to check for pitting / spalling with cylinders on.

BoydBirchler · #5 12-24-2021, 05:12 AM

The rings are wiped out. A serviceable ring will have a bit of varnish all the way around, covering about 1/3 give or take of the ring top to bottom. The shiny part is the portion of the face in contact, the varnished half is the future wear surface. If it is shiny top to bottom; across the entire face, they are shot and will use oil and have lowering compression.

Dan 57 · #6 12-24-2021, 08:18 AM

Valves looking good. Large area of ancient corrosion, question is how deep it is.
Slightly puzzled by the blue spot visible on the bottom of the pictures... overheat of some kind?

Ironflight · #7 12-24-2021, 08:43 AM

Quote:

Originally Posted by Dan 57

Valves looking good. Large area of ancient corrosion, question is how deep it is.
Slightly puzzled by the blue spot visible on the bottom of the pictures... overheat of some kind?

I think the blue spot is a reflection of the spark plug hole….

Karetaker · #8 12-24-2021, 08:55 AM

Howdy Everyone. In the first picture; it appears that there may have been some sort of gasket material or sealant between the cylinder base flange and engine block pad. (where the studs are located for cylinder mounting) That is a no-no; only an O ring should be used for the seal.

Dan 57 · #9 12-24-2021, 09:47 AM

Quote:

I think the blue spot is a reflection of the spark plug hole…

Thanks Paul, most probably is. Was just thinking too much

And it also shows how difficult a photo only analysis is... no depth perception, glare, etc.

kentlik · #10 12-24-2021, 09:54 AM

Thank you all so much for the insight on this!

This motor was purchased used and I have no information on its performance prior to me buying it. So oil consumption may well have been an issue.

I will get my borescope out and take a peek at the cam. I can post a picture if I can figure out the process of doing that.

Wiped out rings, check!

It is a total tear-down as it has sat for several years so I will get a look at the whole enchilada post-Christmas. As long as my cylinder wrench comes in from 'Spruce...

Valves look good, that is good news. Will likely rebuild the cylinders as they will be out and off anyway.

The blue spot does appear to be a reflection as Paul noted.

This cylinder was loose on the case so I am guessing it was previously removed for inspection.
Thanks for the feedback on this, I love this forum and so many o the members are so very helpful in my process of learning and building!