Oil Leak - Damaged Thread

kal · August 16th, 2023, 09:52 AM

Hey everyone, I hope this finds you well. I found an oil leak coming from the plug near the oil filter (see attached). The bolt did not tighten so I thought the bolt thread was damaged. When I removed the bolt, I saw that it isn't the bolt thread, but the hole thread that is damaged (see attached). Any ideas on how to fix this? I opened the service manual to find out what this plug is for but it seems like its just a secondary drain plug?

dcj13 · August 16th, 2023, 10:02 AM

I recommend contacting a machine shop, and taking bike there to have a threaded insert installed.

DannoXYZ · August 16th, 2023, 12:09 PM

Yes, that's drain plug. Other big bolt removes oil-filtre. But can get very messy if used for draining as well.

One way to fix is drill & tap for next size up and use larger drain bolt. I'd recommend having machine shop do this. You can remove oil-pan from engine to bring to them. Easier than trying to flip bike upside down under drill-press.

Other way is use solid-metal insert like EZ-lok or Time-sert. Helicoils will unwind out after 4-5 oil-changes. You want stronger more durable solid insert. Again, machine shop can do this as well.

Triple Jim · August 16th, 2023, 12:43 PM

There are plugs made to seal a stripped drain hole. I have no experience with any of them. Maybe someone else here has used one and can tell us how well it worked.

As an example:

https://www.agscompany.com/products/...nged-universal

August 16th, 2023, 12:09 PM	#3
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	Yes, that's drain plug. Other big bolt removes oil-filtre. But can get very messy if used for draining as well. One way to fix is drill & tap for next size up and use larger drain bolt. I'd recommend having machine shop do this. You can remove oil-pan from engine to bring to them. Easier than trying to flip bike upside down under drill-press. Other way is use solid-metal insert like EZ-lok or Time-sert. Helicoils will unwind out after 4-5 oil-changes. You want stronger more durable solid insert. Again, machine shop can do this as well. Last futzed with by DannoXYZ; August 16th, 2023 at 08:21 PM.

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August 16th, 2023, 10:02 AM	#2
dcj13 Participant Name: Dave Location: South of Seattle Join Date: Oct 2012 Motorcycle(s): '94 K75 std Posts: Too much. MOTM - Aug '15	I recommend contacting a machine shop, and taking bike there to have a threaded insert installed.

August 16th, 2023, 12:43 PM	#4
Triple Jim Guy Who Enjoys Riding Name: Jim Location: North Carolina Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot. MOTM - Oct '18, Aug '17, Aug '16	There are plugs made to seal a stripped drain hole. I have no experience with any of them. Maybe someone else here has used one and can tell us how well it worked. As an example: https://www.agscompany.com/products/...nged-universal