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Is this a bad crank plug?

Posted: Sat Jun 21, 2025 7:01 am
by Slowmo
I currently have the heads and barrels off my engine to repair the worn valve guides, but looked into the crankcase today and I think I am looking at the typical crank plug backing out and scuffing the crankcase? Any insight into what I am seeing appreciated! I believe I am up for a full disassembly?
Thanks,
Marcus.
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20250621_152324.jpg (123.72 KiB) Viewed 3439 times

Re: Is this a bad crank plug?

Posted: Sat Jun 21, 2025 8:20 am
by Tamburinifan
Looks like it is.
Try to make it spin. If so, definitely lose.