Hopefully below you will see some images of the valves on my Lycoming O-360-A1A, bought new through Van's. First flight in August, 2002. Currently at 1392 hours.
The images were taken through the generosity of a Whitman Tailwind builder. This is a SnapOn Bk6500. Very nice!
This is my first attempt using a digital boroscope, so comments are welcome. As best I can tell, the surface of the valves looks okay. No green hot spots and the coloration seems even enough to me. Feel free to disagree.
My main concern is all the buildups around the valve seat edges. I presume this is lead and other fuel additives. Is this a concern?
Compression is in the mid-70's for all cylinders and the engine runs great. I typically run at 60% - 65% power. CHT's are normally 335 - 350F. Since this is a carburated engine, I run rich of peak, usually 50F.
I have not figured out how to post images, so I have included the Google Drive links below. Anyone with the link should be able to see the pictures.
https://drive.google.com/file/d/0Bx-KEMjH0x7mekNDbDktSVk3WXM/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7meDU3WXFkSHI3ZUk/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mLVpOVldEM0kxYlU/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mVVNxdVVsdHBoWjA/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mY1l4S09kbmdkWU0/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mcFdIanFuUmhVS28/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7md2xQamh4UEl6TFU/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7meGVwRDY3Z1NUbTA/edit?usp=sharing
The images were taken through the generosity of a Whitman Tailwind builder. This is a SnapOn Bk6500. Very nice!
This is my first attempt using a digital boroscope, so comments are welcome. As best I can tell, the surface of the valves looks okay. No green hot spots and the coloration seems even enough to me. Feel free to disagree.
My main concern is all the buildups around the valve seat edges. I presume this is lead and other fuel additives. Is this a concern?
Compression is in the mid-70's for all cylinders and the engine runs great. I typically run at 60% - 65% power. CHT's are normally 335 - 350F. Since this is a carburated engine, I run rich of peak, usually 50F.
I have not figured out how to post images, so I have included the Google Drive links below. Anyone with the link should be able to see the pictures.
https://drive.google.com/file/d/0Bx-KEMjH0x7mekNDbDktSVk3WXM/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7meDU3WXFkSHI3ZUk/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mLVpOVldEM0kxYlU/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mVVNxdVVsdHBoWjA/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mY1l4S09kbmdkWU0/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7mcFdIanFuUmhVS28/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7md2xQamh4UEl6TFU/edit?usp=sharing
https://drive.google.com/file/d/0Bx-KEMjH0x7meGVwRDY3Z1NUbTA/edit?usp=sharing
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