SOHC.co.uk Forums > CB500/550

CB550K1 head gasket & O ring replacement advice please.

<< < (3/4) > >>

Brian.:

--- Quote from: Oddjob on April 07, 2020, 01:59:39 PM ---The part number for the O-Rings which go in the oil passage space on the cylinder head gasket is 91301-323-000 and is listed as 5 x 2.4. For some reason the 550 parts books don't show a part number but the 500 parts book does.

--- End quote ---

Hi Oddjob,

Thank you for pointing this out, I'm hoping that the leak turns out to be from the end caps, but if it isn't then I shall need to order these.

Thank you for your help, kind regards, Brian.

paulbaker1954:
Hi
Having had exactly the same issue as you here is my advice..

1) Use only OEM Head Gasket and O rings. I had bad experience with the DSS aftermarket set

2) Once the head is off I would recommend getting it skimmed to ensure it is flat. Shoul not cost a huge amount at a reputable machine shop (mine was £30 if I recall)

3) Read the manual Ash recommends and take your time especially with refitting the cam cover and cam chain etc to make sure you get valve timing right.

Brian.:
Update - it's all done.

I did suspect that my oil leaks were caused by the O rings at each end of the head gasket being the wrong ones.  However, I was wrong; the leaks were caused by there being no O rings in there at all!

I would like to thank Bryan J of this parish.  Part of his reply to my original posting was "my email is in my profile if you want any other help" and he promptly answered every one of my emails - I'm very grateful, as I am for the manual and parts book in Aladdin's cave.

I didn't help myself by dropping a nut down the camchain tunnel either - but that's another story.

Thank you also to Paul Baker 1954, Oddjob, and Trigger.  The head had been skimmed already, so I didn't have it done again, and I bought Viton O-rings from Seal Supplies in Loughborough.

I am really pleased that it's done and to be honest I am pleased with myself I've done it myself! 

Thank you again to all those who offered help, it was indeed very helpful.

Best wishes, Brian.

Bryanj:
Always a good feeling and they aint that difficult

paulbaker1954:
I didn't help myself by dropping a nut down the camchain tunnel either - but that's another story.

Sounds fun, I always now stuff a cloth in that hole when working on my top end having once dropped a battery from my head torch down there which luckily I managed to fish out.

Experience is a journey in life

Navigation

[0] Message Index

[#] Next page

[*] Previous page