CB550F Oil leak?

jammer415

Been Around the Block
Thinking of taking ownership of this CB550... but, it’s been sitting and not ran since 2016!

Can head gaskets or O-rings develop leaks just from sitting?

Does this look like a head gasket leak?
 

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Looks like there’s evidence of oil even above the tappet covers which would be cause to check out your breather cover gasket.
It could also be oil that’s leaking from the head side covers; the aluminum or copper sealing washers holding down the head side cover plates.

It might be worth cleaning down the entire top end, like squeaky clean and then applying some baby powder to really get some idea of where the source of the leak is coming from.


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Orange silicon is evidence someone has been in there that doesn't know what they are doing or at least don't know how to use that stuff correctly. By the looks of that leak they used too much and didn't let it tack enough and squeezed it all out when they tightened the cover down.

That stuff is known to cause issues in small engines as it can break off and plug oil passages.
 
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