I noticed the washer was missing when I changed the oil last week.
When I ran the engine, the plug got a tiny bit of oil on it, so I took it out and put in a little copper washer. Wasn't a specific bike one, it was a plumbing type 3/8s copper washer.
I though that would seal it, but it still gets a tiny drip of oil around the plug after a good blast.
Does anyone know if they need specific washers, either diameter or thickness or material?
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Sump plug / washer
Re: Sump plug / washer
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Re: Sump plug / washer
The right size copper washer helps - presumably this is for your Suzi so you'll need to find the appropriate size to fit. Though if you've fitted a new one (that fits close enough) and it still leaks then I'd be concerned the sump plug has been overtightened causing a crack in the sump around the threads.
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Re: Sump plug / washer
Copper or aluminium washers are ok, they shouldn't be too loose around the thread, and not a thin type you want good surface area, by that I mean for example ID of 14mm OD of 20mm as opposed to ID of 14mm and OD of 16mm, a good fit is best, I also use a steel washer that has a built in rubber seal, these I find are good too.
If your washer fitted well you should maybe check around the sump bolt area for a small crack where it's been over tightened before.
If your washer fitted well you should maybe check around the sump bolt area for a small crack where it's been over tightened before.
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2014 CRMC Post classic Superbike champion.
2014 CRMC Post classic senior production champion. On a Suzuki Katana 1100
My bikes, Firestorm, Suzuki GSX-s1000 Katana, VFR800Fi. Projects, 1986 popup Katana, 3 XJ600’s
2014 CRMC Post classic Superbike champion.
2014 CRMC Post classic senior production champion. On a Suzuki Katana 1100
My bikes, Firestorm, Suzuki GSX-s1000 Katana, VFR800Fi. Projects, 1986 popup Katana, 3 XJ600’s
Re: Sump plug / washer
Copper age hardens after time and does not seal well, it needs to be at least 1mm thick you could heat it with a blow torch until glowing red then drop into water and this would make it malubale and you could reuse it but its easier to replace it with new 

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