Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: Chris whit on September 09, 2019, 10:36:44 PM
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Hi guys , noticed I’ve got a very slight oil leak from the sump gasket, is it possible to drop the sump without removing the engine .
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Yup
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Make sure it is the sump gasket that's leaking, a few years back I changed mine 3 times and still had a leak but eventually found it was either the oil pump, starter motor or gear change lever seal that was leaking (can't remember which now 🙄🙄). The oil was running down and along the line of the sump gasket making it look like it was that what was leaking.
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Gear change seal sounds favourite to me.
Gold star 🌟 for Ken...yes, you are correct, it was the gear change seal on mine but the other 2 got changed in the process of diagnostics 🙄🙄🙄
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Thanks guys ,I’ll change the gear change seal as well .
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If you pressurise the crankcase, using compressed air on the breather pipe, a leaking gear change seal will show up.