Author Topic: CB550F Oil leak?  (Read 403 times)

Offline redrover

  • Posts: 193
CB550F Oil leak?
« on: Jun 25, 2018, 19:50:47 »
Thinking of taking ownership of this CB550... but, itís 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?

Offline bonbons

  • Posts: 24
Re: CB550F Oil leak?
« Reply #1 on: Oct 04, 2018, 23:27:08 »
Looks like thereís evidence of oil even above the tappet covers which would be cause to check out your breather cover gasket.
It could also be oil thatís 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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Offline frogman

  • *
  • Posts: 1965
  • '74 CB360, '71 CB450, '75 CB550SS
Re: CB550F Oil leak?
« Reply #2 on: Oct 05, 2018, 00:28:26 »
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.