S_JH
CB750 Member
I've had a slow oil leak from the oil drain plug for some time. (My cycle is a 1982 CB750C.)
It began when I was tightening the oil drain plug at one point, and felt the threads give (or snap). After that point, the bolt would thread in and out, but never stop turning. I could thread it in until the bolt and washer were snug against the oil pan, but it would never tighten up and stop turning.
I found an oversized bolt with tapping-threads, and managed to get it in. But that oversized bolt has the same problem: it will thread in, but not tighten up.
To reduce oil drips, I would use some high-temp gasket sealant on the washer for the drain plug, and thread it in by hand until the gasket sealant would squish flat. It still left a few drops on the garage floor occasionally.
Now I'm trying to figure out if the threads can be repaired, or if I should go shopping for a replacement oil pan with better threads.
What do you guys think?
It began when I was tightening the oil drain plug at one point, and felt the threads give (or snap). After that point, the bolt would thread in and out, but never stop turning. I could thread it in until the bolt and washer were snug against the oil pan, but it would never tighten up and stop turning.
I found an oversized bolt with tapping-threads, and managed to get it in. But that oversized bolt has the same problem: it will thread in, but not tighten up.
To reduce oil drips, I would use some high-temp gasket sealant on the washer for the drain plug, and thread it in by hand until the gasket sealant would squish flat. It still left a few drops on the garage floor occasionally.
Now I'm trying to figure out if the threads can be repaired, or if I should go shopping for a replacement oil pan with better threads.
What do you guys think?
